Cas latency. XMP is just a profile that loads certain timings.

A lower CL Number indicates lower latency and faster response times. As long as voltages are stock I wouldn't think decreasing timings would decrease lifespan of memory by much. It's a two-step process: RAS identifies the row; CAS zeroes in on the column; This tag-team approach allows for lightning-fast data retrieval. As stated above CAS latency is latency calculated by RAM clock cycles - not real time. Jun 27, 2013. May 23, 2024 · The time it takes for memory to have a new row ready for using data. When discussing CAS, you'll often hear about CAS Latency We would like to show you a description here but the site won’t allow us. It’s a timing parameter that measures the delay between the memory controller sending a command to read data from a specific column in the memory module and the module responding with the requested data. Dec 21, 2023 · The lower the CAS Latency and RAS to CAS Delay values, the faster the RAM performance. 75 ns and true memory latency of DDR5-4800 CL40 = 16. 7. Our program works very simply to give you the exact latency of your RAM. 67 ns. Jul 25, 2023 · How to calculate Ram Latency? First determine the CAS. 75 nanoseconds. Both speed increases and latency decreases result in better system performance. First world latency is only calculated off the first number. Although the term strobe is a bit antiquated today as it’s a vestige from the Asynchronous DRAM days, the term CAS is still used in the industry. DDR4) je udávána v Feb 25, 2017 · Feb 25, 2017. Nov 22, 2023 · The CAS Latency is represented as a series of numbers, such as CL14 or CL16. CAS ( Column Access Strobe) latency refers to the delay time between the READ command and the time data gets available. Aug 3, 2019 · #ryzen #ramspeed #caslatencyI set up to see if you had a lower speed kit of ram with better timings and a higher speed kit of ram with worse timings, which w Jun 30, 2022 · CAS Latency (tCL) – The first memory timing is something called Column Access Strobe (CAS) Latency. Oct 14, 2011 · The CAS latency is given in cycles. . Apr 24, 2022 · CAS Latency is expressed in clock cycles, so don't be fooled by higher numbers. I doubt you would notice any significant difference. will it be a 4 days ago · CAS Latency (CL) is the time delay between a memory controller requesting data from RAM and getting it. Learn how to calculate the true latency of your RAM and why it matters for your PC performance. Ada juga parameter lain yang harus dipertimbangkan, seperti timing, bandwidth, dan voltase. It is sometimes referred to as CL or simply latency. Mar 2, 2024 · What is CAS Latency? CAS latency is a measure of how long it takes for the RAM to respond to a request for data. CAS latency is often abbreviated as CAS or CL. Đơn giản hơn, CL cho biết số chu kỳ đồng hồ mà thanh RAM cần để trả We would like to show you a description here but the site won’t allow us. CAS latency is not an absolute value. DDR-SDRAM modules have a CAS latency of 2 or 2. For example, the real latency (in nanoseconds) of What is CAS Latency? CAS latency is a measure of the delay between the time when a RAM module receives a command to read data and the time when the data becomes available to the CPU. Mar 11, 2024 · DDR5 RAM CL, also known as CAS latency, represents the number of clock cycles it takes for the memory to respond to a read or write request. So higher CL = slower clock cycles, so effectively your 3200MHz ram would perform closer to that of a 2133-2400MHz CL16 kit. Thus, the 1600 one is faster. lotsa people think that the higher cas is offsetting the faster clock, so theres no reason to buy fast sticks at all. CL：CAS Latencyの略。プロセッサがメモリにデータを要求してからデータを返すまでにかかるサイクル数。 tRCD：RAS to CAS Delay。行（RAS）がアクティブになってから、データがマトリックスに格納される列（CAS）がアクティブになるまでにかかるサイクル数。 CAS latency is not that important. The most widely recognized timing for memory would be CAS Latency. Basically, the CAS latency, or CL, is an indication of the time it takes for your memory controller to get a particular piece of data ready to access from the RAM, so CAS latency is the delay, in clock cycles, between the time the processor requests data from memory and the time the memory makes the first piece of data available to be read. ) Oct 4, 2016 · CAS latencies and RAM speed for gaming are irrelevant as long as they are relatively tight, and at native speed. CAS latency has the best performance increase ability if you were to OC. May 13, 2020 · AMD Motherboard Tier List ‖ GPU Cooling Tier List ‖ PSU Tier List ‖ A Dive Into Custom Keyboards & Mechanical Switches. DDR4 usually has a CAS latency of 16, while DDR5 will have a CAS latency of at least 32. Dec 28, 2023 · Cara Mengoptimalkan CAS Latency. Solution. Memory latency can be thought of as "how quick will my system memory respond to a request". Nov 30, 2021 · With DDR4 CAS latencies below 20 in high-performing DDR4 memory, that "CAS 40" might sound concerning. This is a RAM latency calculator. #3. DIMM # 1 SMBus address 0x50 Memory type DDR2 Module format SO-DIMM Manufacturer (ID) Nanya Technology (serial number removed In operation, CAS latency is a specific number of clock cycles programmed into the SDRAM's mode register and expected by the DRAM controller. While DDR5 RAM is newer with better storage density and power efficiency than DDR4, it tends to have higher CAS latency. However, it doesn’t stop here! Memory experts and system architects know that the latency matters only at the system level since that is what users typically experience. CAS Latency (CL) Impact on RAM Speed As previously mentioned, CAS Latency (CL) is the best known memory parameter. The lower the CAS latency, the faster data can be accessed from the RAM module. This is the rate at which data can be transferred by the RAM. 85 ns first word latency. CAS Latency: The Speed Factor. May 8, 2011 · Jun 15, 2011. DDR4-3200 speed with 16 CAS Latency and DDR4-3600 speed with 18 CAS These will perform pretty close to the same in "real world" performance. Jun 7, 2015 · What Is CAS Latency? This is the number of clock cycles that go by, starting from when an instruction is given and ending when the data is available. Finally, calculate the RAM latency. SDR-SDRAM modules may have a CAS latency of 1, 2, or 3. First we need to calculate the duration of a clock cycle. Our Memory Finder can help point you in the right direction Jun 27, 2013 · Jan 16, 2011. Lower CAS latency means faster performance, regardless of the memory speed (assuming there isn’t a gap of more than 1,000Hz between the CL16 and If I'm understanding things correctly, it seems like for applications that do a lot of small reads (like games), CAS latency is far more important than raw frequency (because of the latency in getting that data out), so something like a 3200cl14 might perform better than a 3600cl16. However, it can be misleading at times. The CAS latency is also called CL. Jun 23, 2019 · Rhaemond said: To answer your question, relatively, yes your game will be faster if you choose the lower latency RAM. Luckily, CORSAIR makes DDR4 and DDR5 RAM Feb 9, 2023 · The speed rating of your RAM module is an expression of its data transfer rate. . DDR3-2400 CAS 12, for example, has 50 percent more bandwidth than DDR3-1600 CAS 8, but both of them take the same amount of time to initiate a transfer. Each clock cycle represents a specific unit of time, and the lower the CAS Latency, the less time it takes for the RAM to respond, resulting in faster data retrieval. CAS 25 would be in line for 5600 speed Nov 21, 2023 · In summary, CAS latency is a measure of the time it takes for RAM to access and retrieve data in response to a command from the processor. Apr 1, 2017 · Is Ryzen's gaming performance based off higher RAM Clock speed or is CAS Latency also important? For example, TridentZ's 3200Mhz DDR4 has a CAS Latency of 16 and a more expensive one with a CAS Latency of 14. For memory, there is another factor that impacts performance — latency. Lower CAS latency values result in faster response times and improved system performance. If you’re going for real-world usage the correct answer is “the cheaper one”. We would like to show you a description here but the site won’t allow us. Therefore, true memory latency of DDR4-3200 CL22 = 13. When the memory controller calls for access to a location, the data needs to go through clock cycles in the CAS to get to the final address and finish the command. DDR4-3200 CL16 and DDR4-3600 CL18 are the same latency. DDR5 latencies are seemingly dropping month by month. It defines the time, in clock cycles, required for the RAM to locate and deliver the requested data after receiving the memory address from the CPU. Jan 21, 2017 · The 3200 CL14 kit has a CAS latency of 8. [3] U synchronních SDRAM pamětí (např. 0 RAS# to CAS# delay (tRCD) 5 RAS# Precharge (tRP) 5 Cycle Time (tRAS) 15 Row Refresh Cycle Time (tRFC) 44 Command Rate (CR) 2T MCHBAR I/O Base address 0x0FED14000 MCHBAR I/O Size 4096. NZXT-CAM also says that the timing is 15-15-15-36, but I don't know what It means. Reply. 89 nanoseconds. 5% more memory bandwidth. Latency is best measured in nanoseconds, which is a combination of speed and CAS latency. Lower CAS latencies are helpful for specific tasks, but as I said, it depends on what you are doing. This value measures the amount of time (or clock cycles) it takes the memory to respond to a command request. For rendering RAM frequency is more important, but again, CAS latencies play a very small part here, don't seriously take them into account when buying RAM. May 27, 2015. 3200MHz CL16 and 3600MHz CL18 are essentially the same. MT/s: CL: Calculated nanoseconds: 10. [1] [2] U asynchronních pamětí DRAM je doba uváděna v nanosekundách (absolutní čas). On the other side, the same DDR4-3600 RAM with a CAS latency of 16 has an actual latency of 8. I think the latency / speed equation is interesting from an academic perspective, but it is missing the larger point: CAS latency only affects you when the memory has to activate a new column, while speed is always a factor. The common scenario has faster memory with higher CAS latencies (as measured in cycles). CL. CAS Latency is the most prominent primary timing and it is defined as the number of cycles between sending a column address to the memory and the beginning of the data in response. Most computer BIOS and memory manufacturers list this as either the CAS or CL rating. In the above example, the CAS latency of the memory module is 18 clock cycles. Find out the difference between CAS latency and true latency, and how to choose the best memory for your needs. But for applications where you only have to to that initial Jan 30, 2022 · CPU-Z Says my CAS# Latency (CL) is "15. Let alone tuning the rest of the timing set manually. Jun 30, 2022 · 1. Typically the better this profile is, the better "bin" of ram you have. CAS# latency (CL) 5. So the biggest misconception is that faster memory has a higher absolute CAS latency - because the CAS latency as measured in cycles is higher, when in actual fact it has a lower absolute CAS latency, when measured in nanoseconds. For instance, if there is a RAM stick of 3200MHz with CL16, the actual latency after using the formula will be 10ns, but if we change the value and Latency is best measured in nanoseconds, which is a combination of speed and CAS latency. CAS latency is shown in multiple different ways such as CSA 16, CL 16, or CSA 16 timings. Lower numbers, all things being equal, are better when you're talking about latency figures DDR4 usually has a CAS latency of 16, while DDR5 will have a CAS latency of at least 32. Measured in nanoseconds (ns), it indicates the time delay between when a command is issued to the memory and when the data is retrieved or stored. With HEAVY editing, CAS tends to do a little better, With gaming, Speed Usually does better to a point. Timing adalah kumpulan angka yang menunjukkan waktu yang dibutuhkan oleh RAM untuk melakukan operasi tertentu. Nếu cas latency Dec 15, 2020 · When shopping for computer RAM you'll likely notice that in the specifications for each is a CAS (Column Access Strobe) Latency number, like CL16 on many 3200MHz DDR4 RAM kits. 6 ns Sep 6, 2023 · One must take into account both clock speed and CAS Latency to calculate the actual latency of a RAM stick using the formula: (CL/RAM Frequency) x 2000 (for converting nanoseconds) = Actual Latency. Minimum time required for a row to be active to ensure data can be accessed from it. From the above table, you can see that a DDR4-3600 RAM with the CAS 15 latency has an actual latency of 8. Ram Latency Calculator. Here is the formula to calculate total RAM latency in seconds. Memory latency is the time (the latency) between initiating a request for a byte or word in memory until it is retrieved by a processor. Luckily, CORSAIR makes DDR4 and DDR5 RAM in basically every mixture of size and speed you could want. Dec 31, 2022 · CAS Latency is measured in clock cycles, so CL30 by itself means absolutely nothing. Compared to 3600 with a CAS of 16 the 5600 CAS of 28 is greater than the speed ratio. Nov 28, 2018 · CAS latency is the number of clock cycles between an instruction and the data availability. The Newegg listing's specs said it had a CL of 20, but at this point IDK which one I should trust. However, the CL16 rating also comes with an increase in costs. Learn how CL affects memory performance, how it differs from other timings, and how to optimize it for your system. 5600 MHz @ CL36 is 12. In general, the lower the CL, the better What is CAS Latency ? CAS Latency (CL) stands for Column Address Strobe. The CL18-rated RAMs are still pretty good for general usage. As for the amount of FPS you'll get, that depends still on other factors. 5. 6000 MHz @ CL38 is 12. After that, it divides the resultant number by RAM speed to get the final RAM latency. If you can't, they'll work fine, and you may never actually see the difference. It is a crucial specification in determining the performance and speed of your computer’s memory system. the true latency numbers prove this is wrong. Calculator. We've also observed that, in addition to memory speed, memory timings affect performance. If the data are not in the processor's cache, it takes longer to obtain them, as the processor will have to communicate with the external memory cells. (14 / 3200 x 2 x 1000) The 3600 CL16 kit has a CAS latency of 8. yeah, what i meant to imply was that you shouldnt waste money on buying a lower cas set with the same speed, since the true latencies are different by only fractions of a nanosecond. Apr 1, 2024 · CAS Latency (CL) là từ viết tắt của Column Address Strobe Latency, nghĩa là khoảng thời gian độ trễ trong chu kỳ đồng hồ từ khi lệnh đọc được gửi đến khi dữ liệu thực sự sẵn sàng để sử dụng. Hi guys, just wondering, I know that mixing memory size and speed is a no-no. #1. Both timings measure different aspects of memory access. It is represented by a numerical value indicating the number of clock cycles required. Next, determine the data rate. Frequency. To understand CL, let’s break it down further. CAS latency is measured in clock cycles, which are determined by the memory module’s . The lower the CAS latency, the faster the RAM can send data to the processor, and the higher the overall system performance. Learn how speed and latency affect memory performance and how to optimize them for your system. Apr 10, 2023 · The Importance of CAS Latency (CL) What is CAS Latency? Let's zoom in on the first number in that RAM timing series, the CAS Latency (CL). The 3600 kit does, however, have 12. CAS is short for CAS latency, that meaning how long the delay is between when the RAM is queried and how soon it responds (measured in clock cycles) 0. You will see a list of timing on the RAM like CL16-18-38 and CL14-14-34. Lower latency means data starts to come sooner, however the higher the bandwidth the faster a burst can be transmitted. Memory SPD. It is a relative value tied to the clockspeed. If you actually bought that CL22 RAM from a retailer , return it and get something CL16 or lower. The number indicates the number of clock cycles it takes for the RAM module to respond to a command. RAM Latency (ns) = (CL x 2000) / MHz. For this example, the CAS is 4. CAS latency also plays a role in reducing latency, which is the delay between the memory controller requesting data and the RAM module delivering that data. Major2Minor. CAS Latency (CL) là viết tắt của Column Address Strobe Latency, tức là độ trễ trong chu kỳ đồng hồ giữa lệnh READ và dữ liệu thời điểm có sẵn. CAS Latency (CL) is an abbreviation for Column Address Strobe Latency is defined as the total number of clock cycles it takes from when the memory controller receives an instruction for retrieving data to the time a RAM module accesses the specific data from a particular column address and makes it available at one of its Apr 30, 2024 · The CAS latency of the Corsair Vengeance, CL32, is the first number of the timings and is one of the main factors in determining the latency and overall speed of RAM. RAS to CAS Delay When memory is accessed sequentially, the row is already active and only the column changes, so tRCD has little impact on performance. Award. 2. The other primary timings are very important also. Cas latency có ảnh hưởng trực tiếp đến tốc độ truy cập dữ liệu của RAM. For instance, would an 2x4 8gb package with 1866 speed and 9 CAS be better than an 2x4 8gb package with 2133 speed and 10 CAS, both priced slightly above $80. My question is how much does CAS matter compared to Speed. (Real Latency) = CAS Latency x 2000 / Data-rate. It tells us how many clock cycles the memory will delay returning the requested data. Jul 29, 2022 · The lowest latency DDR5 kit yet. True latency is best measured in nanoseconds. lowering CAS lat timings will decrease the amount of time between the stimulance and response, or timing delay. The scheduler in the memory controller can optimize accesses to activate columns in an optimal order to minimize latency Nov 21, 2023 · CAS Latency (CL): CAS (Column Address Strobe) latency is the most commonly used metric to measure RAM latency. Nói một cách dễ hiểu, CL biểu thị cho số xung nhịp mà thanh RAM cần trải qua để phản hồi lại tín hiệu từ CPU. Jul 2, 2018 · CAS Latency is the most widely talked about and compared memory timing. CAS works in tandem with RAS to pinpoint the exact location of data within the Dynamic Random Access Memory (DRAM). Mar 19, 2024 · What is CAS Latency? CAS latency, or timings, refers to how many clock cycles it takes for the RAM module to output data needed by your CPU. #8. CAS latence (zkratka CL, anglicky Column Address Strobe, též časování paměti) udává dobu, kterou je potřeba čekat před následujícím čtení z operační paměti v počítači. Typically, Ryzen systems really benefit from better RAM. To get the true latency of a kit of RAM in nanoseconds, you'll need to do some math. Dec 6, 2022 · The main difference between CAS latency 16 vs 18 is that the CL16-rated RAM is more optimized and faces less latency as compared to a CL18-rated RAM. 0 Clocks", but NZXT-CAM says my ram model is labeled "3600C20" meaning the CL is 20. As such, it is the faster kit. 13. Jun 30, 2014 · There seem to be many low budget RAM cards (if that's a correct term) that fit my bill. For example, a RAM kit with a CAS latency of 16 takes 16 clock cycles to access the data and complete the task. This means that the RAM module can quickly respond to commands from the CPU, resulting in improved system responsiveness. Nov 21, 2023 · CAS Latency, abbreviated as CL, stands for Column Access Strobe Latency and refers to the time it takes for a RAM module to respond to a request from the memory controller. 33 nanoseconds. ago. Higher-end systems and applications may benefit from lower CAS Latency and RAS to CAS Delay values. 3. Nov 24, 2020 · Yes CAS Latency matters, ii is the number of clock cycles that pass from when an instruction is given. It stands for Column Address Strobe Latency, and it's the star of the show when it comes to RAM timings. (16 / 3600 x 2 x 1000) That difference is completely negligible. Aug 30, 2023 · Differences Between the CAS Latency 15 VS 16. CL timings are just a part in the calculation, and it only differs in a matter of nanoseconds Mar 24, 2022 · What Is CAS Latency. • 7 mo. The faster the number, the faster your computer can store and retrieve the data stored in local memory. This value is typically synonymous with performance. Jun 13, 2023 · Cách Cas latency ảnh hưởng đến hiệu suất của máy tính. 32,640. CAS Latency is a measurement of how many clock cycles it takes your RAM to process a command from your processor. The CL timing is an exact number, the base time that it takes to get a response from memory in the best possible scenario Jan 2, 2022 · CAS Latency Meaning. Nov 22, 2021 · This is because memory speed and CAS latency are two different things. CAS Latency, often abbreviated CL, is the most commonly quoted timing parameter and the most important memory timing parameter with respect to overall performance. Here is a table representing how CAS latency affects memory latency. Take the RAM bandwidth and cut it in half, as the actual RAM clockspeed is half of the bandwidth Jun 7, 2015 · Low CAS Latency Or High Data Rates? Neither. A higher number at a higher frequency can very well translate to the same absolute latency (in nanoseconds) CL 16 at a transfer rate of 3200 MT/s translates to 10 ns CL 38 at a transfer rate of 5200 MT/s translates to 14. Back in November of 2021, a CAS latency of 40 was normal, even for lower speed kits. Luckily, CORSAIR makes DDR4 and DDR5 RAM CAS latency generally appears first in timing sequences for RAM and indicates the number of clock cycles that elapse between when the memory controller instructs the memory module to access a particular column in its current row, and when such access produces the data that resides there. 5,278. The formula for the exact speed rating changes slightly based on the version of DDR memory your computer is using (see below). May 4, 2022 · CAS latency goes up faster than speed does. Calculated Nano Seconds. first word is 10ns on both. 66 ns first word latency. Not only are there lots of other timings, but DDR ram is both read and written in burst mode. It depends on waht you are trying to use the computer for. Nov 21, 2023 · A lower CAS latency can significantly improve the overall speed and responsiveness of these activities. This is the most widely compared and advertised timing. This is the CAS latency and is often listed when purchasing RAM for a computer. Latency is therefore a fundamental measure of the speed Sep 15, 2019 · CAS latency is a measure of how many clock cycles there are between the READ command being sent to the memory stick and the CPU getting a response back. Although the difference isn’t significant, it can still affect May 2, 2023 · CAS Latency. (obviously a small difference, but this one is faster) Also - Ryzen 7000 series is designed to work with 6000 MHz, and in the past has been pretty sensitive to clock timings due to its FCLK. Apr 25, 2023 · CAS latency stands for Column Access Strobe latency. CAS latency is how quickly the RAM can deliver data to the CPU. – CAS Latency. Dec 22, 2020 · CAS Latency (tCL/CL/tCAS) CAS Latency – Image: MakeTechEasier. To get the real time latency: 1/ ( (RAMspeed/2)/1000) x CL = True Latency in nanoseconds. So, a CAS9 RAM will take 9 cycles to respond and the CAS6, 6 cycles. Aug 11, 2023 · And finally, CL is the CAS Latency or Column Address Strobe Latency and is measured in a clock cycle. In simpler terms, CAS Latency is the time it takes for the memory controller to access a specific May 27, 2015 · 4,510. CAS latency stands for Column Address Strobe latency, which is the time taken by the RAM module to access the data requested by the processor. Dec 28, 2023 · CAS latency is one parameter that determines the performance of RAM. Column Access Strobe Latency is referred to as CAS Latency. The best memory speed is often capped by the May 4, 2022 · To throw a brief bit of maths at things, the real-world CAS latency is measured as (CAS Latency x 2,000)/Memory Speed, which in the case of the DDR5-5600 CL28 kit comes in at 10ns. but what if everything is the same except for the CAS Latency? My rig already has 8gb (2X4gb) Corsair Vengeance 2133mhz 11-11-11-27 timing and I bought a Mushkin Radioactive 4gb, same speed as the Corsair but has 10-12-12-28. Feb 7, 2022 · CAS latency is the number of clock cycles delayed between the moment RAM data is requested by your CPU and the time this data is available. Khi CPU yêu cầu dữ liệu từ RAM, cas latency quyết định thời gian CPU phải chờ đợi bao lâu để có thể truy cập dữ liệu đó. CAS latency，簡稱CL值，是指電腦要讀取記憶體的資料時，需要等待多久的時間才能真正開始讀取。CL值越高代表所需延遲時間越長，通常會伴隨頻率的增加而提高，並非追求越低的CL就是最佳的選擇。舉例來說，CL2是指記憶體存取資料需要兩個時脈的時間。一般來說，CL值越小，表示採用的製程越先進 Jul 9, 2024 · How Latency Works With Memory . Use the RAM latency calculator . For this problem, the data rate is 45 MHz. 57. CAS latency adalah salah satu faktor yang mempengaruhi kinerja RAM, tetapi bukan satu-satunya. One command read/writes a lot more than one word of data. (3600 cas 22 will be much worse than 3200 16. CAS latency is measured in clock cycles, and it is typically expressed as a number followed by the letter “CL”. Lower CAS is faster. NEWCOMERS Remember to ' Reply ' to comments in order for people to see them, this is done by clicking the arrow icon at the bottom of a comment (Quote). CL30 at 6000MT/s will end up with the same theoretical latency as say CL34 at 6800Mt/s or CL28 at 5600MT/s (though practically the 6800MT/s kit will have the lowest actual latency for reasons I'll get to later). Consider the overall RAM speed and other timings when evaluating the performance of a memory module. Now putting it together: the DDR3 2000 CAS9 will take 9/2000 seconds, which is equal to 0,0045 seconds, to respond while the DDR3 1600 CAS 6 will take 6/1600, which is equal to 0,0038 seconds, to respond. XMP is just a profile that loads certain timings. It takes the CL (or CAS) number of your RAM kit and multiplies it by 2000. (CL*2000)/transfer rate. Lower CAS latency values indicate faster access times and lower latency. CAS Latency. It takes the data rate (MT/s) and CAS latency (CL), then calculates the absolute latency for DDR memory accesses in nanoseconds. The lower the CAS latency, the faster the RAM. " This is usually tied to the RAM speed---higher speed, higher CAS latency. Example: because the latency in nanoseconds for DDR4-2400 CL17 and DDR4-2666 CL19 is roughly the same, the higher speed DDR4-2666 RAM will provide better performance. Nov 22, 2023 · Latency and Responsiveness: The CL Number directly affects the latency or delay in transferring data to and from the RAM module. It's usually referred to as "CL" after the RAM speed, for instance, "3200 Mhz CL16. For example, CL16 means that the RAM has a CAS latency of 16 clock cycles. The number behind the CL stands for the RAM kit’s CAS latency. Share. This is usually measured in nanoseconds and expressed by a CL rating. As speeds increase, true latencies decrease and/or remain roughly the same, meaning faster speeds deliver better performance. It's no longer simply an expression True memory latency (ns) = (2000/RAM Speed) (ns) x CAS latency. This is the number of clock cycles that pass from when an instruction is given for a particular column and the moment the data is available. However, because of its faster clock speeds, the newer standard has better performance overall. Any value may be programmed, but the SDRAM will not operate correctly if it is too low. Latency is often misunderstood because on product flyers and spec comparisons, it's noted in terms of CAS latency (CL), which is only half the formula for calculating latency. (I know the prices are brutal, but I CAS latency helps with super complicated tasks like simulation and AI training, while giving slightly better frame consistency in most games. nf qh zg or cv bl gc yo di tb