How to calculate ram latency. DRAM is Sep 6, 2023 · Why RAM memory timings and latency are just as important as, capacity and clock speed. hence you have 5800x3d outperforming everything by far. Quickly calculate latency in nanoseconds using CAS latency and DRAM frequency for better performance insights. By calculating RAM latency, users can make more informed decisions when upgrading or troubleshooting their hardware Jan 29, 2016 · So I hear that RAM speeds aren't important in gaming, but important in tasks that require processing. RAM timing and latency play a significant role in determining how quickly data can be accessed and transferred within the system. May 1, 2017 · The end must justify the means. You appear to be ignoring bandwidth and just looking at latency? Many formulas or equations are floating around in papers, blogs, etc. Conclusion RAM latency plays a critical role in your computer’s overall performance. Two of the most crucial specifications are MHz (megahertz), representing the speed of data transfer, and CL (CAS Latency), indicating the delay in accessing data. 2. Apr 7, 2025 · The evolution of computer memory continues with DDR5 RAM, offering significant improvements over its predecessor, DDR4. An example would be 14-15-15-35 or 14-14-14-34. The formula is: CAS Latency (CL) = (RAM Speed / Data Rate) Timing. The Timings measure the latency between the various common operations on a RAM chip. Feb 17, 2024 · The DDR5 RAM Latency Calculator is a valuable computing tool used to determine the latency of DDR5 RAM modules. 71 nanoseconds (DDR3) (15/3000) x 2000 = 10 nanoseconds (DDR4) (30/6000) x 2000 = 10 nanoseconds (DDR5) With this, slower transfer speed Jun 8, 2025 · The RAM formula is a way to calculate the CAS Latency (CL) of your RAM, which is a measure of the delay in clock cycles. It’s possible to calculate the true latency of the memory by comparing the speed to the CAS latency (CL). Sep 14, 2024 · Understanding how to calculate the CAS latency of your RAM helps you choose the right upgrades. Nov 28, 2012 · I was going through this link where they are dealing with the statistical data for latencies of main memory, L1 and L2 cache. I will be video editing, which is processor intensive, so RAM speed will be important. Understanding and optimizing RAM latency is pivotal for achieving an efficient and responsive computing experience. New comments cannot be posted and votes cannot be cast. A memory with CL = 7 will provide a 22. Jan 1, 2025 · This tool calculates the latency associated with Random Access Memory (RAM). It also calculates the clock cycle time. Anyway, I want to know if there is an equation to see how long it'll take for RAM to respond based on CAS latency and frequency. By understanding CAS Latency and Data Rate and using our Ram Latency Calculator, you can make informed decisions when choosing RAM modules for your system. The CAS latency, combined with the frequency, is also used to calculate the latency of a kit in nanoseconds, we’ve developed a RAM Latency Calculator for DDR5 kits, which you can use to calculate the latency of your RAM. Putting the MHz and CL (timings) into an equation can determine the actual speed of your RAM. Our web app simplifies the process, letting you easily The calculation of latency done by AIDA64 takes in account all the processes that happen when accessing the memory. RAM latency measures the time delay between a memory controller issuing a command and the RAM responding, critical for assessing memory performance. Data_Rate is the rate at which data can be transferred by the RAM (measured in MHz). Fast, accurate, and beginner-friendly! Feb 16, 2023 · The RAM timings are basically measured in nanoseconds and it helps to identify the access time of different parts of the memory or RAM. So you have 30 ns for the memory Jun 18, 2025 · Where: CAS_Latency is the number of clock cycles it takes for the RAM to access a specific column of data. What Our RAM Timing Simulator Does 📊 Compare Base & Tuned RAM Profiles – See execution order and latency differences. It takes the data rate (MT/s) and CAS latency (CL), then calculates the absolute latency for DDR memory accesses in nanoseconds. Jan 14, 2024 · Intel® Memory Latency Checker (Intel® MLC) is a robust tool designed for precise measurement of memory latencies and bandwidth under varying system loads. At minimum it has two completely unrelated aspects to performance: bandwidth and latency. Use the mouse wheel when RAM Memory Bandwidth measurement numbers (for both Intel and AMD with instructions on how to measure your system) May 29, 2024 · Measuring RAM latency helps you identify the best-performing memory out of the bunch. I then restarted PC and booted win10 PE (strelecPE specifically), loaded same version of aida64 to repeat latency tests. You can calculate the time interval between clock ticks with 1/(1/2 * frequency * 10e6) = T seconds Since timings are in "ticks", you just multiply the rating by the interval in seconds. Rather than doing math on papers or typing in Excel sheets, let's automate the boring stuff with llm-analysis ⚙ Sep 9, 2024 · Using two memory modules improves system performance, memory bandwidth, and latency compared to single-channel setups. The reason I went into winPE was for Introduction The RAM Latency Calculator is a powerful tool designed to help users determine the latency of their Random Access Memory. With these numbers, the calculator gives DDR4 latency of 13. Also, column access latency is far from the only timing that impacts performance. Understanding Key Node Exporter Metrics Node Exporter collects a wide […] Apr 22, 2025 · The lower the CAS Latency, the better the overall performance—usually, the CL scales are done with the DRAM voltages. The discussion as I remember was about comparing fast MHz RAM clock speed w/high latency -vs- slower MHZ RAM clock speed To calculate first word latency just take the cas latency (CL) multiply by 2000, then devide by ram speed (MHz) A 3200 MHz CL16 kit would be: 16 x 2000 ÷ 3200, and you get 10ns of first word latency. Our tool to calculate RAM latency simplifies the whole latency measuring process. See relevant content for calculatorfest. Input base and tuned memory profiles to calculate latency in nanoseconds and cycles. May 10, 2013 · In general, as the frequency goes up, the time for a tick interval goes down (which is why faster RAM always seem to have higher timing values). Memory speeds are sometimes listed as "MHz," but this can be a bit misleading, you should always use MT/s when talking about computer memory. 6 GBps. And using cudathreadsynchronize() can not help time only one thread’s time cost. Mar 27, 2025 · Learn more about the differences between RAM speed and CAS latency, and what it means for your PC. This can make your system run faster and better. In Part 2, we set up Node Exporter and Prometheus to gather and store metrics from our Linux server. Purpose: It is used by computer enthusiasts, system builders, and 5 days ago · On this page, you'll find a tool designed to help you calculate the precise nanosecond timing of computer memory and convert these timings across different MT/s (Mega Transfers per second) ratings. If you are unsure about choosing between two memory modules, we recommend getting a RAM with higher frequency and lower CL. If the problem states that the time is a miss penalty, it should mean that the time is in addition to the time for a cache hit; so the total miss latency is the latency of a cache hit plus the penalty. With this RAM latency calculator, you can determine the latency for memory accesses of SRAM to DDR5 generations from the data rate and CAS latency. , about how to calculate training or inference latency and memory for Large Language Models (LLMs) or Transformers. I was wondering is it possible to compute the same using a C/c++ code Jul 28, 2018 · DRAM Calculator for Ryzen helps with overclocking your memory on the AMD Ryzen platform. AMAT's three parameters hit time (or hit latency), miss rate, and miss penalty provide a quick analysis of memory systems. Visualize execution order and timing differences for activation, read, precharge, and other critical operations to fine-tune performance. This is known as conversion and does not directly mean that the two values are equal. Learn how they impact your PC's performance speed. This calculator helps you determine the latency of your RAM in nanoseconds (ns). I am running 3733 15-15-15-29, would 3733 15-14-14-39 have overall lower latency. Memory is already so ridiculously fast in regards to bandwidth, that latency should ALWAYS come first in your mind. Discover memory solutions for your PC at Crucial today. Latency describes the response time of the memory with the Column Access Strobe (CAS) latency being the most prominent. The CPU and RAM interact several times, and there are 5 steps in segmentation, 3 involving the RAM and 2 involving the CPU. How does one use these numbers to calculate the latency of RAM? Archived post. Gauging the total speed of ones ram by using frequency and primary timings alone would only work in a perfect world, so you can see why it's pretty important to focus on efficiency You can't reduce RAM performance to a single formula, each application is going to have a different memory usage pattern. Learn about RAM timings, speeds, and real-world latency. 75 ns. Lower latency RAM can lead to faster and more responsive computing experiences. What is the maximum RAM speed for Ryzen 3600? I like getting nerdy so I've been looking at RAM lately and there is scarce information about how to actually calculate CAS Latency. You can't boil RAM down into a single number though. . 2% improvement on memory latency over a memory with CL = 9, considering that both are running at the same clock rate. We’ll present numerical examples to calculate packet time using network latency and bandwidth. It is to be expected because its just a stock xmp. Nov 28, 2018 · The lower the CAS, the faster the RAM—and consequently, the more expensive. Jan 4, 2024 · The Memory Latency Calculator provides a user-friendly interface to quickly determine the memory latency based on specific parameters. Oct 6, 2024 · With this RAM latency calculator, determine the latency for memory accesses of SRAM to DDR5 generations from the data rate and CAS latency. 75 nanoseconds (DDR4) (40/6400) x 2000 = 12. Dec 21, 2023 · Knowing that for the actual performance of RAM it is not only speed that matters, but also low latency, then you can calculate the theoretical performance of modules by substituting the values of a specific memory into the formula. I've done number of attempts with this bench and the results were in the same ballpark. RAM with good latency eliminates stutters and slowdowns during work and gaming. RAM latency While a RAM’s data transfer rate tells you how many mega transfers (1,000,000 data transfers) the RAM can do in one second (a DDR4-3200 RAM can conduct 3,200 mega transfers in 1 second), its CAS latency is also important for understanding RAM performance. Concretely it can be defined as follows. Our ram latency calculator will help you calculate RAM latency in nanosecods after inputting ram speed in Mhz and CL timing. Optimize your PC performance today. The speed of DDR4-3200 is 3200 MT/s. As latency is the delay that occurs between operations, it can have a serious impact on the performance of RAM if it increases Jan 6, 2015 · You can calculate RAM latency with frequency and CL, with a formula of: (cas latency/ram transfer speed) x 2000 = latency in nanoseconds Few examples: (22/3200) x 2000 = 13. Using Ryzen DRAM calculator you can achieve higher memory overclocks with better stability. Mar 19, 2024 · How is RAM CAS Latency Measured? CAS latency is measured in nanoseconds, combining both speed and how many clock cycles it takes for the RAM to respond. [1] Feb 3, 2010 · I tried to use the cuda timer outside the kernel function, but it’s difficult to extract the mem latency which is only part actions of the whole kernel. What is the RAM Latency Calculator? Definition: This calculator computes the RAM latency (RL) in nanoseconds based on the CAS Latency (CL) and Data Rate (DR) of a RAM module. So, I've done aida 64 latency bench, which gives me 65 ns. (Clearly your formula and variables do not take this approach, labeling M--which is really total access time on a miss--as the Aug 11, 2023 · RAM Latency depending on CAS Latency and Transfer Rate This clearly makes the memory module with lower CAS Latency the winner, given that the RAM speed is the same. Our web app simplifies the process, letting you easily input MT/s values to get exact timing in nanoseconds or convert timings back to equivalent MT/s values. This calculator can also evaluate any of the variables given the others are known. Get clock cycle time, CAS latency, and total latency in nanoseconds in seconds! This is a RAM latency calculator. Learn how to calculate DDR3, DDR4, and DDR5 memory First Word Latency so you can choose the best modules for your performance needs and budget. To put this in plain speak, you multiply the CAS latency by 2000 and then divide by the data rate. Calculates the absolute latency for DDR memory accesses in nanoseconds using the data rate (MT/s) and CAS latency (CL). How It Works Simply This includes the clock speed (MHz), CAS Latency (CL), and the type of RAM Double Data Rate (DDR). You can even calculate the time the When it comes to upgrading or building a new computer system, selecting the right RAM (Random Access Memory) is crucial for optimal performance. Whether you’re comparing RAM modules, planning a new build, or just want to get the most out of your system, this calculator gives you the real latency in nanoseconds, making it easier to make data-driven decisions. By using smart optimization methods, you can make your computer much faster and more efficient. If you want to calculate the latency of your RAM modules, you can do this by multiplying the duration of the clock cycles by the total number of cycles. This solution is based on the GPU-Z. Can anyone explain? Jun 30, 2022 · All those Latency specifications on RAM Kits can become confusing when buying memory. When deciding between RAM of different clock speeds, the RAM with the higher clock speed is superior; but when choosing between RAM of identical clock speeds, the RAM with lower CAS latency is faster. Understanding these factors and choosing the appropriate RAM modules with the right timing and latency can greatly We would like to show you a description here but the site won’t allow us. Nov 26, 2024 · Discover how to calculate RAM latency with the RAM Latency Calculator. ⚡ Optimize RAM Performance – Learn how to tweak timings beyond factory presets. Enter Transfer rate associated with DDR memory CAS Latency Formula Clock Cycle Free RAM Latency Calculator for DDR4 & DDR5 memory. You can also use the formula mentioned above to calculate the RAM latency to find out the exact delay in Demystifying Memory Overclocking on Ryzen: OC Guidelines and Explaining Subtimings, Resistances, Voltages, and More! Nov 28, 2012 · I was going through this link where they are dealing with the statistical data for latencies of main memory, L1 and L2 cache. (Lower is better!) Note: The number given on shopping sites and by manufacturers for "speed" is usually in MT/s. eg. Go back. The RAM Latency Calculator is an essential tool for anyone who wants to understand or optimize memory performance. The results were around 55-57 ns. ⏳ Calculate Memory Latency – Get results in nanoseconds and cycles. What you have to take in account is segmentation, pagination and all the processes that happen when the memory in accessed. How important are they and what Latency is best? Dec 29, 2023 · The Ram Latency Calculator is an invaluable tool for enthusiasts and professionals alike, offering a quick and accurate means to assess memory performance. Sep 9, 2024 · DRAM Calculator for Intel Desired Frequency (MHz): CAS Latency: DRAM Voltage (V): Calculate Getting the best out of your Intel device starts with knowing how DRAM works. 1. That being said, frequency can be just as good for latency as it is with bandwidth. frequency should be prioritized over tighter timings Apr 9, 2012 · Somewhere on this forum I remember seeing a poster present a short formula for comparing system RAM bandwidth (throughput?) based on the memory's clock speed and latency. Optimizing RAM Speed and Latency Improving your system’s performance starts with tweaking your RAM’s speed and latency. Easily calculate RAM latency with our interactive tool. Feb 2, 2024 · Determine your memory response time with the RAM Latency Calculator. This blog post will Jan 25, 2025 · Is higher RAM speed always better? Learn how DDR4 and DDR5 memory clock speeds, latency, and CAS timings influence real-world performance. Miss rate (MR) is the frequency of cache misses, while average miss penalty (AMP) is the cost of a cache miss in terms of time. For calculating the RAM timing or latency, you will need to use a simple formula where the value of CAS latency and Data Rate are used. It suggests stable memory timing sets optimized for your memory kit, for example B-die. You can also use the formula mentioned above to calculate the RAM latency to find out the exact delay in Memory interleaving is a method of increasing memory bandwidth by organizing memory blocks across multiple memory banks to prevent what are essentially “stutters” in memory access. Old calculator. Network Bandwidth Network bandwidth represents the maximum amount of data we can transmit over a wireless or wired communication channel for a specified amount 200MHz increase in effective DRAM frequency negates the latency penalty of loosening tCL, tRCD and tRP by 1, but has the benefit of higher bandwidth. comContent blocked Please turn off your ad blocker. So how to make a accurate timer for only one thread and how to extract the global mem latency, coalesced/uncoalesced shared mem latency, and texture mem latency? Oct 24, 2017 · Your primary timings tend to dictate the absolute potential of your ram, while secondary/tertiary timings determine exactly how close you can get to that potential. This article will guide you on how to use the calculator, the underlying formula, an illustrative example, FAQs, and a conclusion. Sep 15, 2023 · Enter the number of units and the size of each unit in bytes into the calculator to determine the memory size. It just takes a little Apr 20, 2023 · memory latency over memory speed, as they are more single thread bound than multi threaded like open world games. It stands out by offering fine-grained DDR5 RAM Timing Simulator – Compare and Optimize Memory Performance Analyze and compare RAM execution cycles with our RAM Timing Simulator. However, understanding the factors that contribute to overall performance can be complex. May 11, 2022 · For example, 3200 MHz achieves 25. Aug 14, 2024 · Ram Latency Calculator Bandwidth Per User Calculator Effective Bandwidth Latency Formula The following formula is used to calculate the effective bandwidth latency for a given data size, effective bandwidth, and latency. Jun 18, 2012 · I've been searching for some type of equation or explanation of how to find the latency (access time) of a memory system when given the bandwidth, the precharge (refreshing) time between accesses, Oct 20, 2023 · A guide on selection of RAM. If the number you have is in MHz, simply double it to get MT/s. RAM latency is the time it takes for the RAM module to access a set of data in one of its columns. The CAS latency for this module is 22 clock cycles. Voila, you have your RAM latency in nanoseconds! Calculation Example Alright, let’s walk through an Saw that the ram latency formula = cas latency *2000/ data rate. It is measured in nanoseconds and is calculated by multiplying the CAS latency by 2000 and then dividing by the data rate. Sep 24, 2016 · The difference comes from when the latency of a miss is counted. If you gain a slight amount of bandwidth, but lose on latency at all, it's a bad trade. It takes into account the memory frequency and several timings to compute the result. Overclocking RAM Overclocking 1. In the realm of computing, latency is a crucial factor that can significantly affect the performance and responsiveness of your system. May 16, 2019 · If it's simply to measure access latency: If you are using an x86 processor maybe the Intel Memory Latency Checker will help Intel® Memory Latency Checker (Intel® MLC) is a tool used to measure memory latencies and b/w, and how they change with increasing load on the system. Mar 21, 2022 · In this tutorial, we’ll discuss network bandwidth, latency, packet time in detail. Compare real latency, bandwidth, and get personalized RAM recommendations. Someone who tightens only their secondary timings could often achieve better results than someone who only does primaries. Especially solve the doubts like what is CAS Latency Ratio (CL) and the DRAM frequency. In this post, we’ll focus on using Grafana to create meaningful, real-time dashboards from those metrics, allowing you to monitor your server’s performance at a glance. Jul 25, 2023 · Enter the data rate (MHz) and the CAS latency (CL) into the calculator to determine the ram latency in nanoseconds. 🔬 Visualize DRAM Operations – Understand ACTIVATE, READ, PRECHARGE timing dependencies. RAM speed vs. When it comes to the performance of memory, the “read speed” and “latency” of the memory module come directly to mind. This is the formula that calculates the values from these factors and determines the precise RAM speed or absolute latency: I was trying to see for example which has lower latency regarding primary timings. Kinda curious why you’re multiplying the cas latency by 2000. What is DDR? Oct 3, 2024 · This calculator provides a simple way to understand and calculate the RAM latency of your system, helping you make informed decisions when upgrading or configuring your computer's memory. Hit latency (H) is the time to hit in the cache. Using the formula to calculate latency using effective clock speed, while the formula you used is for actual clock speed Not correctly accounting for either the Mega or Nano prefix (just following your work, it would appear you used Hz instead of MHz). Use CAS latency and data rate to determine memory performance for gaming and applications. This guide will show you how to figure out and set up DRAM for your Intel system. This way, you'll make the most of your hardware. Generally, on the product specification table is actually the value of “frequency” and “timing”. This RAM latency calculator determines your memory's true latency in nanoseconds (ns) by using its clock speed (MHz) and CAS latency (CL). Purpose: It is used by computer enthusiasts, system builders, and Easily calculate DRAM timing, memory bandwidth, and configuration with this all-in-one DRAM calculator. Ryzen DRAM calculator is designed to work with all AMD Ryzen Zen architecture first and second generation processors. In general, this allows you to make comparisons between differing RAM modules. Oct 30, 2024 · Mm, works well here, but the name/description might be a bit unclear to some - you describe it as calculating nanoseconds of latency and it’s called Latency Calculator, yet the field called “latency” is referring to timings (at least from my understanding). 5 nanoseconds (DDR5) (10/1866) x 2000 = 10. Dec 22, 2020 · What are RAM Timings? While frequency is one of the more advertised numbers, the timings of the RAM have a big role to play in the overall performance and stability of the RAM as well. Oct 3, 2024 · Convert from RAM clock rate (MHz) to transfer rate (MT/s) Let’s use the calculator to find the RAM latency for DDR4. vdwrcip cspls khk yjc zcoka hcwfkc sdfqgu vnxlsmw egktiqx nsoe