CAS latency varies depending on the clock speed and the number of cycles. Nov 24, 2021 · If one RAM stick was CAS 17 and the other was CAS 19, would the CAS 17 which supports CAS 19 use the slowest latency? Is that what it means by "supported?" Also what does module number mean? CAS latency is the time delay between a command and the data availability in memory. The lower the CL, the better. 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. com/ThioJ spd latency or cas latency often bring many other numbers than just cl. You want high bandwidth and low latency, that's why I like to do perf = speed / latency. Normally RAM can work fine slower than its rated speeds, so I would set the timings for your slowest module and let the others work with it. CAS latency / CL is "column address strobe" latency: The number of clock cycles required to access data in a new column when the correct row is already open. This is a RAM latency calculator. You want frequency as high as possible and timings as low as possible, so it's something of a balancing act. CAS latency is measured in clock cycles, and it is typically expressed as a number followed by the letter “CL”. 35v, that’s why you can’t use them on some laptop with the advertised Cas 16. 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). Extended memory timings are usually ignored when calculating true memory latencies and system latencies. The CAS latency is also called CL. Jan 21, 2017 · But no, decreasing CAS latency won't automatically cause problems, and low CAS latency is a good thing. Please help Thank you 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. Dec 31, 2022 · CAS Latency is measured in clock cycles, so CL30 by itself means absolutely nothing. Click Calculate. To understand them, bear in mind that the memory is internally organized as a matrix. What Is a Good CAS Latency? Latency is best measured in nanoseconds, which is a combination of speed and CAS latency Both speed increases and latency decreases result in better system performance 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 Of course, less latency is better, and more frequency is better. To determine the actual memory speed, substitute CAS(CL) and Frequency in the fields. Feb 13, 2018 · Jumlah total siklus clock data harus melalui (diukur dalam CAS Latency, atau CL, pada lembar data) Durasi setiap siklus clock (diukur dalam nanodetik) Menggabungkan kedua variabel ini, maka akan memberi kita persamaan latency: latency sejati (ns) = waktu siklus clock (ns) x jumlah clock cycle (CL) Paradoks tentang latency Aug 27, 2014 · What is Latency ? A delay in transmitting data between a computer's RAM and its processor. I only realised now that the latency timings for the RAM are really poor and not only that, there's isn't much a price difference between the kit I bought and the kits with lower latency timings like CL16. True RAM latency, measured in nanoseconds (ns), combines CAS latency with the RAM’s frequency. Cas latency có ảnh hưởng trực tiếp đến tốc độ truy cập dữ liệu của RAM. Memory latency becomes important when your memory is constantly being accessed, meaning that your memory kit needs to respond and act on a request as fast as possible. My goal here is to achieve dual-channel 32 GB ram instead of single-channel 16 GB ram. What Is RAM Latency? RAM is random access memory, and it is the memory that is used for your open applications and programs while you are working on the computer, tablet, smartphone, or other device. 75 ns. (CL*2000)/transfer rate. True memory latency is measured in nanoseconds and is a combination of RAM speed and CAS latency. 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. Let’s calculate the true memory latencies of DDR4-3200 CL22 and DDR5-4800 CL40 as an exercise. Calculates the absolute latency for DDR memory accesses in nanoseconds using the data rate (MT/s) and CAS latency (CL). why get 2666mhz though when 3200mhz is barely more expensive? Reply reply 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. CL18 at DDR4-4000 is the same time as CL16 at 3600. ) Oct 19, 2015 · the big number ram, also can run at normal speeds, but has profiles possible for the big numbers, usually with diff latency, sometimes much tweaking is needed to be 110% stable with these high faluting OC numbers, a bit more voltage and going off of auto(SPD) and tweaking it a tiny bit. Moving from the early iterations of DRAM, both data access rates and Nov 2, 2023 · CAS latency is the time delay between CPU request and RAM response. Cách Cas latency ảnh hưởng đến hiệu suất của máy tính. Sowohl höhere Geschwindigkeiten als auch geringere Latenzen führen zu einer besseren Systemleistung. Dont know which to pick. It has an AMD R7 5800H (8c, 16t) processor with 16GB of 3200MHz (CL22) RAM from Samsung, Nvidia Geforce RTX 3060 Max-Q (130W) GPU, and 1TB of M. May 13, 2020 · AMD Motherboard Tier List ‖ GPU Cooling Tier List ‖ PSU Tier List ‖ A Dive Into Custom Keyboards & Mechanical Switches. Dec 22, 2020 · CAS Latency (tCL/CL/tCAS) CAS Latency – Image: MakeTechEasier. Lower numbers refer to faster retrieval times. The lower the absolute latency the better. Find out the compatibility and performance issues. You will see a list of timing on the RAM like CL16-18-38 and CL14-14-34. Dec 15, 2020 · 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 lower numbers are generally more desirable. But one webpage said that the proper way is dividing the latency by the frequency, and the best memory is the one with a smaller result. CAS Latency: Evaluate the CAS Latency value of the RAM modules and choose one with a lower latency if your budget allows. 75 ns per cycle) may have a larger CAS latency of 9, but at a clock frequency of 1333 MHz the amount of time to wait 9 clock cycles is only 6. Upvote 0 Downvote CAS Latency is the most widely talked about and compared memory timing. 5. Will you notice a significant difference in the performance? We would like to show you a description here but the site won’t allow us. Primary, secondary, and tertiary timings can impact benchmark performance on Intel and Ryzen CPUs, and we talk about th Motherboard is an Asus H81M-E 2 Ram sticks are different brands 1st Slot will be 8gb ram ddr3 at 1600 mhz with CAS Latency 11 2nd Slot will be 4gb ram ddr3 at 1600 mhz with CAS Latency 9 Would this be safe to use, and how would it impact me performance wise? Feb 23, 2015 · RAM Timings Table: https://drive. Mar 14, 2015 · Without getting too much into the science behind CAS latency, it's basically the time between when a memory controller sends an instruction to the memory to retrieve information and when it actually reaches the RAMs pins. 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). Viewed 3k times 2 I already have : 8GB GuRu Time By TT วันนี้นำเสนอเรื่องราวเกี่ยวแรม RAM DDR5 ในหัวข้อเรื่องCL หรือ Cas Latency Jan 27, 2018 · But for Ryzen, DDR4 3000mhz/3200mhz at CAS 14-14-14-30ish is the sweet spot. Apr 25, 2023 · CAS latency stands for Column Access Strobe latency. Learn how it affects performance, how to balance it with bandwidth, and what are the ideal targets for different use cases. Edit: First and foremost you can mix RAM speeds, but it is not guaranteed to work. Dec 21, 2023 · CAS Latency: CAS (Column Address Strobe) Latency is the time delay between the memory controller requesting data from a specific column and the data being available to be read. . In general, the lower the CL, the better Nov 26, 2020 · Mixing two RAM with different CAS Latency / Timing. Apr 18, 2024 · CL/CAS Latency - Column Access Strobe Latency is the delay between the memory controller requesting data from the RAM and the available data; the first number listed in a kit's timings. On the other hand, higher CAS latency can introduce delays, slowing down various tasks, especially those that require frequent RAM access. The CL timing is an exact number, the base time that it takes to get a response from memory in the best possible scenario Nov 28, 2018 · CAS latency is the number of clock cycles between an instruction and the data availability. This week, I put together a pc with an i5-12400F, Crucial 8X2 gb DDR4 RAM @3200 22CL and Crucial 1 tb nvme with GPU to be purchased later. Cas latency is important and you should consider it when buying ram. the algorithm to calculate is (2000/MHZ)*CAS. The operations that these numbers indicate are the following: CL-tRCD-tRP-tRAS-CMD. In the above example, the CAS latency of the memory module is 18 clock cycles. Jul 2, 2018 · RAM (memory) timings are complicated. My question is how much does CAS matter compared to Speed. Jan 25, 2018 · I want to purchase a ram stick, I am not sure of my current installed rams CAS Latency, but i know its got 19 as the first number. It represents the number of clock cycles the RAM module takes to respond to the CPU’s request for data. * A lower Cas Latency means that the memory is able to transfer data more quickly, resulting in improved performance. In general, this allows you to make comparisons between differing RAM modules. A RAM kit with a CAS latency of 14, for example, can be described as CAS 14 or CL14 or as having CAS 14 timings. The first parameter will be the CL/CAS latency, which is 14. Lower CAS latency values result in reduced latency, ensuring that data is accessed and transferred more efficiently. CAS (Column Access Strobe) latency refers to the delay time between the READ command and the time data gets available. May 2, 2021 · Latency is the amount of time it takes for any memory operation to initiate, and it may come as a shock to the uninitiated that this metric hasn’t changed in decades: Both an ordinary stick of We would like to show you a description here but the site won’t allow us. You’ve likely seen CAS latency (CL) advertised on RAM. I searched online and couldn't find any consensus. lower cas latency is better. The lower the CAS latency, the faster the RAM. Modified 1 year, 7 months ago. SDR-SDRAM modules may have a CAS latency of 1, 2, or 3. You can get around this by enabling/disabling gear down mode in your bios. You also need to take bandwidth into account. google. Higher clock speeds Halbleiteringenieure wissen, dass CAS-Latenzen ein ungenauer Leistungsindikator sind. Jun 30, 2014 · There seem to be many low budget RAM cards (if that's a correct term) that fit my bill. We would like to show you a description here but the site won’t allow us. Sep 6, 2023 · 1. lotsa people think that the higher cas is offsetting the faster clock, so theres no reason to buy fast sticks at all. What is CAS Latency(CL)? CAS Latency, CL for short, stands for Column Access Strobe Latency which can also be described as memory latency. Sep 27, 2021 · Στη μνήμη τύπου SDRAM, το CAS Latency μετριέται σε αριθμούς κύκλων ρολογιού. 7 ns first-word latency 5600cl28 -> 10 ns But latency isn't the whole performance. the true latency numbers prove this is wrong. Jul 19, 2022 · Hey there people. Try new version. Faster CAS latency means quicker data retrieval, resulting in a more responsive computer. Nov 21, 2023 · The CAS latency of your RAM can significantly impact system performance. usually getting lower than 16 or 15 makes the ram much more expensive. Learn how to mix DDR4 rams with different CAS latency from r/buildapc community. CAS Latency vs. Jul 18, 2024 · CAS Latency, often abbreviated as CL, is a critical parameter that measures the time delay between when a memory controller requests data from the RAM and when it’s actually available to be sent to the processor. CAS in particular is the number of cycles needed to access the desired position in the RAM and make the data in that position available for the motherboard to retrieve it. Since RAM is not necessarily fast compared to the computer's processor, RAM latency can occur, causing a delay between the time a computer's hardware recognizes the need for a RAM access (initiates a request for data) and the time the data or instruction is available to the processor. If I had to choose between DDR4-3200 speed with 16 CAS Latency and DDR4-3600 speed with 18 CAS Latency, what should be my priority? Should I focus on lower CAS Latency or higher RAM speed for optimal gaming performance, particularly for minimizing input lag? Nov 28, 2022 · Is it possible to mix different rams with different CAS latency and different MHz? Such as mixing 16 GB cl 17 2933 MHz DDR4 and 16 GB cl 20 3200 MHz DDR4 for the laptop for the which CPU supports max 2933 MHz. For example, CL16 means that the RAM has a CAS latency of 16 clock cycles. It refers to the time a DRAM module takes to access a set of data from one of its columns & make it available in its output pin, starting from when the READ command was sent from the memory controller. Apr 29, 2021 · The latency is cas18 (xmp) and this model is compatible with all the laptop, because this timing are validated for 1. Jun 30, 2022 · At a given first word latency, say 10ns, would higher speed memory or lower cas latency memory perform better? Between several kits of ram that are equivalent except one is 3200MT/S CL16, another is 3600MT/S CL18, and a third is 4000MT/S CL20, which would perform best? RAM Latency Calculator. Οι μνήμες που χαρακτηρίζονται πχ ως CL9 χρειάζονται 9 κύκλους ρολογιού ως CAS Latency. Jul 7, 2017 · The easiest way to ensure memory compatibility is to buy the amount of memory you want all in the same set to ensure it all matches. Nov 22, 2023 · 3. 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. This tells you how many clock cycles it takes to access specific data, but it doesn’t give the whole picture. 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. Oct 18, 2019 · Hello! I read that the formula for calculating the memory latency in nanoseconds is this: (CAS latency / RAM clock speed) * 2000 = latency in nanoseconds 3200MHz cl16 -> (16/3200)*2000 = 10 nanoseconds 3600MHz cl18 -> (18/3600)*2000 = 10 nanoseconds Does this mean that if the Motherboard May 3, 2024 · Capacity: 32GB (2 x 16GB) | Memory Type: 288-Pin DDR5 SDRAM | Memory Speed: 5,600MHz | CAS Latency: 40 | Timings: 40-40-40-77 | Height: 45mm For a reliable kit of straight-shooting, high Nov 21, 2023 · 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. Putting the MHz and CL (timings) into an equation can determine the actual speed of your RAM. Die Latenz wird am besten als Kombination aus Geschwindigkeit und CAS-Latenz in Nanosekunden gemessen. The problem is comparing two memories when one has both more latency and more frequency. Smaller Dec 12, 2023 · This includes the clock speed (MHz), CAS Latency (CL), and the type of RAM Double Data Rate (DDR). Learn how to calculate the true latency of your RAM and why it matters for performance and budget. Here is the formula to calculate total RAM latency in seconds. As far as the CAS Latency timing is concerned, the two are identical, both have 10 nanoseconds of latency. Apr 18, 2023 · It’s important to note that CAS latency and RAM frequency are interrelated, and changing one can affect the other. Make,model, memory speed and cas latency timings all play a critical role in how stable your system will operate. Old calculator. Examples: 3000MHz / CL15 --> latency = 10 ns 3200MHz / CL16 --> latency = 10 ns Sep 18, 2023 · So for DDR5-5600 CL 28, the actual CAS Latency (CL) will be 5600 / 2 = 2800 MHz / 28 = 100 MHz or 10 nanoseconds. RAM Speed: Let's say DDR4-3600 speed with 16 CAS Latency are too expensive. Aug 11, 2023 · And finally, CL is the CAS Latency or Column Address Strobe Latency and is measured in a clock cycle. Oct 20, 2023 · If that CAS#Latency (CL) is 9. Higher RAM frequencies may require higher CAS latency values to maintain stability, while lower CAS latency values may require lower RAM frequencies to prevent data errors. CAS Latency (CL) CAS latency (Column address strobe latency) measures the number of clock cycles from when a request is made to read data until said information is available. Mar 24, 2022 · What Is CAS Latency. com/file/d/0B5ePJLHhrAUMZFBnc05TLUZMYzg/view?usp=sharing Join the conversation! Twitter https://twitter. Faster DDR3-2666 memory (with a 1333 MHz clock, or 0. The number behind the CL stands for the RAM kit’s CAS latency. Online i found two ram sticks, one says CL19 and the other says CL 19-19-19. Expresses the number of clock cycles required to read the first bit of DRAM with the correct row open. 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. It is often represented by a number, such as CL14 or CL16. (Lower is better!) Feb 7, 2022 · CAS latency (CL) is the number of clock cycles delayed between the time RAM data is requested and the time this data is available. Lower CAS Latency values, such as CL14 or CL16, generally indicate better performance but may come at a higher cost. 2 Nvme SSD again f 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. The best ram should have low cas latency and bigger MHz. Jun 13, 2023 · Nếu cas latency quá cao, người dùng có thể không thể ép xung RAM lên mức cao hơn được, dẫn đến giới hạn khả năng ép xung của máy tính. It might be due to slow RAM latency. 20v (The Crucial as mentioned above operate at 1. A CAS cycle latency of 15 is best for all mid-range gaming systems, and it is perfectly acceptable for most high-end gaming systems. This is the formula that calculates the values from these factors and determines the precise RAM speed or absolute latency: You want to compute latency in nanoseconds : latency = cl / (speed/2) : 6600cl32 -> 9. Latency is best measured in nanoseconds, which is a combination of speed and CAS latency Both speed increases and latency decreases result in better system performance 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 May 2, 2023 · CAS Latency. Oct 6, 2020 · The combination of data rate and CAS Latency has been used to compare single access latency numbers for memory over the years. 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. You can show this quite easily: 4000/18 = 222 3600/16 = 225 Mar 1, 2024 · Latency is composed of various factors but we'll limit this discussion to CAS latency, which is denoted by the "CL" or "C" number in your memory specs. In this video, I am going to walk you through RAM speed, latency, and gigabytes in order to help you pick the best RAM configuration for your laptop as a cre Aug 6, 2020 · At most, I found that the Supported CAS Latencies of my laptop ranges from 10T to 20T and that the Minimum CAS Latency Time (tAA) is 13. It takes the data rate (MT/s) and CAS latency (CL), then calculates the absolute latency for DDR memory accesses in nanoseconds. Sep 13, 2020 · With DDR4, like DDR3 and 2 before it, CAS latency does not change much. Here is a table representing how CAS latency affects memory latency. System specs are quite good. Memory Clock Speed: Consider the memory clock speed, measured in megahertz (MHz). CAS latency is often abbreviated as CAS or CL. To get the CAS/CL, just look at RAM Label, and you'll find CL14-14-14-34. Jan 2, 2022 · 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 We would like to show you a description here but the site won’t allow us. Latency is best measured in nanoseconds, which is a combination of speed and CAS latency Both speed increases and latency decreases result in better system performance 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 Oct 14, 2019 · Are you running a Ryzen system? Sometimes Ryzen IMC doesn't like odd numbered timings, and will round up. RAM Latency Calculator. This means if you want to upgrade the total RAM size without replacing the existing RAM, then you must purchase another RAM with the same CL ratio and clock speed. Learn how speed and latency are related, how to optimize them, and why they matter for system performance. This is the most widely compared and advertised timing. Go back. 0 clocks then your system is currently running on RAM with CL9 Ratio. Nov 20, 2023 · CAS Latency (CL): CAS latency, denoted by the CL timing, is the most commonly discussed type of RAM latency. 4. DDR-SDRAM modules have a CAS latency of 2 or 2. With this 1 ns clock, a CAS latency of 7 gives an absolute CAS latency of 7 ns. I bought a laptop not too long ago (feb), and Ive been noticing stuttering in my games. For DDR5-6000 CL30, the CL will be 6000 / 2 = 3000 MHz / 30 = 100 MHz or 10 nanoseconds. So if you have a ram 3200MHz and 16 cas latency you should have: (2000/3200)*16 = 10 Now the smaller the result is,the fastest the ram will be. So, how does it help? 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. . The CAS latency stands for Column Access Strobe latency, which refers to the delay between instruction to transfer data and the response time of the execution. Jun 27, 2013 · 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) Upvote 0 Downvote P Dec 5, 2023 · How Does Cas Latency Affect The Performance Of Ddr4 Memory? * Cas Latency affects the performance of DDR4 memory by determining the speed of data transfer between the memory and the motherboard. 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. You can check your kit's CAS latency by We would like to show you a description here but the site won’t allow us. 750 ns. Ryzen loves low latencies and high clock speeds on RAM for gaming. spd latency or cas latency often bring many other numbers than just cl. WHERE DOES MEMORY LATENCY MATTER? Memory latency in most consumer kits is generally good enough for most applications: basic office work, web-browsing, most gaming applications, etc. Ask Question Asked 3 years, 8 months ago. As such, a lower RAM latency is better as Jul 25, 2023 · To calculate RAM latency, multiply the CAS latency by 2000 then divide by the data rate. xj qy ss fq zx to sx qf yt vh