Is 40 cas latency good for ddr5. Nov 18, 2022 · Hey All, I'm building a new PC for MIDI Orchestration, not gaming, so that means 128GB RAM, a lot of NVMe drives and a decent video card for 3-4 monitors. My question is: how big a deal is CL30 over CL36? Is a 32GB DDR5 6000 mhz CL30 worth $70ish more than a 16GB DDR5 6000 mhz CL36? When shopping for a memory kit for your PC, you’ve surely seen the CAS latency or CL timings listed in the specifications, like CL17-18-18-39 or just CL17. For instance, the Corsair Vengeance DDR5 package (one of many cheaper reminiscence modules out there) contains a CAS latency of 40 (or CL40) with the total timings for the 5,200MT/s package being 40-40-40-77. This will give you a much better idea of your RAM kit’s overall CAS latency. Cas latency does matter, but what’s considered a good cas latency depends on the speed and capacity of the stick. For gaming, is current DDR5 actually any better than the DDR4 that's widely and cheaply available? I suppose the DDR5 has higher bandwidth but aren't Zen CPUs especially sensitive to latency? Nov 30, 2021 · And while we expect industry-standard DDR5 to eventually reach data rates as high as DDR5-6400, what’s currently available is DDR5-4800, with a sluggish-sounding CAS latency rating of 40. The lower the CL, the better. DRR5 may have slower timings compared to DDR4 at the initial release, but as the technology matures, DDR5 will improve and have tighter timings in the future. 1V DRAM voltage. But unlike our drink orders, RAM latency is measured in clock cycles, not minutes. Hi, I am a newbie in building a gaming PC, so please excuse my newbie question. Mar 28, 2025 · For example, the Corsair Vengeance DDR5 kit (one of the cheaper memory modules available) features a CAS latency of 40 (or CL40) with the full timings for the 5,200MT/s kit being 40-40-40-77. Nothing else. To comprehend the significance of DDR5 RAM CL30 vs CL40, it is essential to grasp the concept of CAS latency (CL), a crucial parameter that measures the time it takes for a memory module to retrieve data from a specific location. Preferably cl32, cl30 or cl28 (cl28 is pretty rare) More sticks and Build Help In terms of pricing the emphasis seems to be on the CAS Latency since the CL30 RAM costs $30 more (Same model, DDR5 6000). Like, exactly this. It does matter if amd or intel: For intel, faster is better and lower cl is better. Jul 10, 2025 · The only advantage of DDR4 over DDR5 is that DDR4 has lower CAS latency. 69 nanoseconds per access. Generally higher speed with lower Cas will give you better latency. I see that a lot of people recommend DDR5-6000 at CL30. Jan 22, 2025 · While DDR5 RAM is newer with better storage density and power efficiency than DDR4, it tends to have higher CAS latency. DDR5 RAM CL32 modules have a CAS latency of 32 clock cycles, while DDR5 RAM CL36 modules have a CAS latency of 36 clock cycles. So would it be more worth it to just get 6000MHz CL30 and just lower the CL with overclocking or should I instead get something with a lower overall latency (i. 16ns. When ddr5 finally gets down to CL20 or lower, that is when we will really see it stretch its legs. 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. Lower latency on ddr5 will produce better results, though it can be small at times, but other times, it can be noticeable. Overall the list looks pretty good. DDR5 RAM is faster than ever, but it's not all about speed -- CAS timing matters too. However, if you’re on a budget, then DDR5 RAM CL36 is a good option that still offers good performance. Jul 9, 2025 · While DDR5 RAM is newer with better storage density and power efficiency than DDR4, it tends to have higher CAS latency. If your on a 13/14 gen Intel you should really be aiming for 7200 or higher, with the lowest cas latency possible. No higher. Apr 20, 2024 · What To Know In the realm of high-performance computing, memory plays a pivotal role in determining the overall responsiveness and efficiency of a system. Current IOD and datapath infrastructure is bottlenecking memory bandwidth, and that's one of the reasons why DDR5-4800 C40 on AM5 is inferior to DDR4-3200 C20 on AM4, for instance: Exact same effective maximum bandwidth with much more latency. I want to know that in DDR5, is there any performance difference issue in 4K Gaming if i switch to CL 30 to CL 40 Apr 2, 2025 · The advent of DDR5 RAM marked a significant leap forward, promising increased bandwidth and improved efficiency compared to its predecessor. Trying to figure out DDR5 (for gaming) looking at Trident Z5 kits and getting lost. We Still a touch above DDR4 latency, but DDR5 has now had the slowness over good DDR4 cut down by 85% from the initially typical DDR5-4800 CAS40 at launch, and for under $400. Feb 1, 2025 · Find out if the Corsair Vengeance RGB Black 32 GB RAM (model CMH32GX5M2B6400C32) is good for gaming and professional tools. CL stands for CAS Latency, or Column Access Strobe Latency: lower is better. I'm Oct 2, 2023 · Anyone have enough experience with ddr5 or know about if lower CL's are worth the premium price over higher CL and similar MHz speeds for real world Mar 26, 2025 · Understanding DDR5 and CAS Latency Before diving into the specifics of CL30 versus CL36, it’s essential to grasp the fundamentals of DDR5 RAM and what CAS latency represents. A 6400 CL40 kit should be better than a 6000 CL30 kit near exclusively, so you generally want to go for the highest rated kit you can find. While DDR5 RAM CL30 offers a slight edge in terms of speed, DDR5 RAM CL36 is a more affordable option that still delivers solid performance. As far as the CAS Latency timing is concerned, the two are identical, both have 10 nanoseconds of latency. This article will guide you through some of the best DDR5 RAM kits on the market in 2024, focusing on their CAS latency. Alternatively, a DDR5 8000mhz module would need a CAS latency of 40 to achieve a slightly higher latency of 10. He then goes on to show this empirically. In this article, we examine its effective frequency, timings, CAS latency, profile, voltage, DDR version, and memory capacity. Optimized for Intel 700/800 series chipsets, it features a low CAS latency ensuring speedy, efficient data processing. Jul 24, 2024 · which is better and whats the difference? 32 gb corsair vengance cl 30 6000mhz cl30 vs kingston fury beast cl30 ? Apr 10, 2023 · Explore RAM timings explained, including CAS Latency, striking the perfect balance between speed and latency, and boosting performance with XMP profiles. CL 40 at 6400mt/s is 3200MHZ which DDR4 is half of. For example, CL30 at 6000 MT/s is better than CL40 at the same speed. Nov 26, 2024 · Even so, DDR5’s blazing-fast speeds translate to better real-world performance since CAS Latency is just one part of the overall latency equation. With DDR5's higher data transfer speeds, you would think that alone translates to better gaming. 7200MHz CL34) and just lower the speed down to 6000MHz Feb 1, 2025 · Find out if the Corsair Vengeance Black 32 GB RAM (model CMK32GX5M2B5600C40) is good for gaming and professional tools. However, understanding the factors that contribute to overall performance can be complex. However, within the realm of DDR5, subtle variations exist, most notably in the form of CAS Latency (CL) timings. After my experience with the two, I ponied up the few extra bucks for the Hynix set. Understanding the difference between DDR5 CL30 and CL40 RAM is crucial for maximizing your system’s performance. You can find a latency calculator online. True memory latency is measured in nanoseconds and is a combination of RAM speed and Jul 9, 2025 · While DDR5 RAM is newer with better storage density and power efficiency than DDR4, it tends to have higher CAS latency. 6000 cl 30 is what you should aim for if your on AM5. Mar 11, 2024 · What To Know 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. Cas latency in and of itself rarely matters. Dec 31, 2022 · CAS Latency is measured in clock cycles, so CL30 by itself means absolutely nothing. For CL30, I can’t find anything at 16GB, lowest is 32, so it’s a significant premium over CL36. Any information is welcome, as I'm currently working on a new build and wondering if the latency is worth the sacrifice? If the need should arise. Mar 19, 2024 · What CAS Latency Is Best? To find the best latency for your gaming PC, we recommend you consider both the total number of cycles and its duration. 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. Simple as that. Some benefit more from lower latency. Sep 27, 2024 · Our AMD Zen 5 Memory Scaling Review examines six different DDR5 memory speeds, including DDR5-8000, DDR5-6400 1:1, DDR5-6400 CL28 and others. We would like to show you a description here but the site won’t allow us. In general, a combination of moderate MHz and low CL is the sweet spot for most users CL40 is better than CL46. You should ignore any DDR5 RAM below 4800MHz or above CAS latency 40. DDR5 RAM with its high storage density and efficiency, often has higher CAS latency when compared to DDR4. This is particularly meaningful for gaming, where memory latency is especially impactful. DDR4 usually has a CAS latency of 16, while DDR5 will have a CAS latency of at least 32. Apr 13, 2023 · Why does DDR5 have so much more CAS latency than DDR4? Latency figures are in clock cycles, so higher doesn't necessarily mean worse. Jul 3, 2023 · Based purely on these numbers alone, the CL30 kit seems to start off faster, but afterwards the latency seems to increase by quite a bit in the middle (it jumps from 30 to 40, a +10 in latency) while the CL32 and CL36 kits seem to be relatively consistent in comparison. 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. Oct 17, 2024 · In regards of the CAS latency, DDR5-5600 CL46 is comparable to 4800 CL40. Mar 10, 2025 · CAS Latency (CL): Lower latency means faster response times. And new generations run at blistering frequencies. 0 ns. Most DDR5 sticks you’ll find are running at CL40, which kinda kills the whole point of the higher speeds. Skill one is supposedly better? And I don't understand how What do these mean? Mar 1, 2024 · What To Know DDR5 RAM CL32 modules typically operate at speeds of 4800MHz or higher, while DDR5 RAM CL36 modules typically run at speeds of 4800MHz or 5200MHz. Think of it like this: DDR5 is like a super-fast race car, but it’s got a really slow driver. Longsys' offerings aren't even the pinnacle of what DDR5 has to offer, though. ComputerBase provides an overview with a comparison to DDR4. Learn about RAM timings, speeds, and real-world latency. Aug 3, 2021 · Bandwidth and latency are directly comparable between DDR4 and DDR5, but at the moment you should expect the latency figures for DDR5 to be a bit disappointing. I don't know which is better for a Gaming PC. If both are equal the one with better overall timings should perform better. Jun 30, 2019 · What this tells me me, is that a DDR5 4800mhz module would need a CAS Latency of 22, for a reduced latency of 9. Jul 9, 2025 · While DDR5 RAM is newer with better storage density and power efficiency than DDR4, it tends to have higher CAS latency. For users who prioritize absolute performance and are willing to pay a premium, DDR5 RAM CL32 modules offer Apr 7, 2025 · The evolution of computer memory continues with DDR5 RAM, offering significant improvements over its predecessor, DDR4. 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). Sep 22, 2023 · "RANT: THE CAS LATENCY TIMING DOESN'T MATTER AS MUCH AS YOU THINK IT DOES" This is the full title of the video. Keep in mind CAS latency is usually measured in cycles. e. Table of contents 1 Bandwidths, latencies I was checking the specs of a DDR5 RAM where the Latency was 40-40-40-77 (Corsair Vengeance CL36) 30-44-44-96 (G. Most DDR4 RAM runs at CAS 15-19, while early DDR5 is around 36-40. Look for kits with a balanced combination of high speed and low CAS latency. May 11, 2024 · What To Know CL stands for “CAS Latency,” and it refers to the number of clock cycles it takes for the RAM to respond to a read or write request. ignore the intel spec, the cpus imc can always run faster than what intel says and thats guarantee to run at, worse case with the slowest ram and 4 dimms Right around 6800 with a good tune you will be in the 100GB/s read and writes and low50’s latency, i just finished up some ddr5 testing for tonight so the info is still fresh in my memory, best I’ve been able to do on ddr4 is ~75GB/s with 39ns latency 4800 14-13-13. The CAS latency isn’t measured In seconds but rather cycles. But that is not always the case. What would be the best DDR5 RAM for the lowest latency? I would wanna run my ram at 6000MHz (as that is apparently the max for 7800x3d) and as low of a latency as possible. Is that really the case? Here are the specs for my other parts, if it's relevant: I have an i9 12900K CPU and a Most apps want both. I want to change to 8GB 2 stick 5200MHz (CL 40). In the May 19, 2025 · I've put the top gaming memory through its paces to find out what the best RAM to pair with your new gaming PC is. DDR5 RAM CL40 vs CL32: Performance Implications: The primary difference between DDR5 RAM CL40 and CL32 lies in their CAS latency. One is some T-force ddr5 6000mhz cl 38-38-38-78 that's going for $175 and the other is gskill ddr5 6000mhz cl 30-40-40-96 for $210. That being said, I have yet to see any head-to-head comparisons between 5600 CL46 and 5600 CL40 kits. 88ns) than DDR5-6000CL30 (10ns). The key takeaway is that users can adopt DDR5 memory technology without worrying about latency performance. 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. I'm wondering how much that difference in timings matters to be worth the extra $25. CL40 modules have a latency of 40 clock cycles, while CL32 modules have a latency of 32 clock cycles. Traditionally, clickbait involves misleading or empty titles that don't actually Serious question. A latency of 40 is considered poor for gaming, etc. There's not much any need for a PCIe 5. Ok so let's say I have two sets of DDR5 ram, RAM A - 5600mhz Cl36 RAM B - 6000mhz Cl38 Out of these two specs what would you say is the better RAM and why? For the sake of augment let's say everything else about RAM A & B are the same. Since it’s AM5 I need DDR5 RAM. I ordered the i9-13900KF and when it's released I'll order the MSI Z790 Sep 22, 2023 · "RANT: THE CAS LATENCY TIMING DOESN'T MATTER AS MUCH AS YOU THINK IT DOES" This is the full title of the video. The difference is 1st one CAS Latency 30 & Memory Latency Timings 30-40-40-96 and the 2nd CAS Latency 36 & Memory Latency Timings 36-36-36-96. Jul 11, 2025 · Short answer: DDR5’s latency is virtually the same as DDR4. There's a Mar 9, 2019 · What is the meaning of a RAM’s CAS latency or CL timing? Latency and RAM performance explained. Apr 24, 2024 · While DDR5 RAM CL36 offers superior performance, it often comes at a higher price point compared to DDR5 RAM CL40. It was a good strategy in the current market. Nov 14, 2022 · Hi guys, I'm just looking into a new AMD system, and I have a few questions regarding DDR5 RAM and latency. A memory stick capable of running tCL 22 at 6000 MT/s, but has to run tRCD 50, tRP 50, and tRAS 80 will almost definitely perform worse than 30-40-40-50 for the same timings. Comparison is made needlessly difficult by advertising latency in clock cycles - they could just advertise in nanoseconds and then you could compare directly. For DDR5-6000 CL30, the CL will be 6000 / 2 = 3000 MHz / 30 = 100 MHz or 10 nanoseconds. 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. I recently ordered these RAM sticks: Corsair Vengeance RGB DDR5 32GB (2x16GB) 5200MHz C40 Intel Optimized I just read that "C40" is not very good. The lower the latency, the quicker the CPU can access the data temporarily stored in the RAM, resulting in a more responsive system. . DDR4-3600CL16 actually has a lower overall latency (8. This can be calculated by dividing the RAM speed by the CL. However, because of its faster clock speeds, the newer standard has better performance overall. Lower CAS = less waiting around = better. I'm trying to sort out how important the CL value is for the ram. Which begs the question. Some apps and hardware benefit more from higher clock speed. Feb 17, 2025 · So, you’re asking about CAS latency in DDR5? Let’s break it down. DDR5 also introduced new features like dual-channel architecture per module and on-die ECC, boosting performance and reliability for demanding tasks like AI, big data, and 4K (or higher) gaming. 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. Expert insights to help you choose wisely. Skill Flare X5) It was marked as SPD Latency in the specs section and I am confused since the G. May 28, 2025 · Buy now The Ripjaws S5 series offers an impressive 96GB DDR5 setup with ultra-fast 6400MT/s frequency, ideal for intensive high-performance computing and gaming. 0 motherboard, but if you are keeping that for a really long time, and upgrading to high-end GPUs it's worth getting. You might find more data on the latter one. Feb 20, 2025 · Among the sea of specifications, two terms often pop up: DDR5, representing the memory generation, and CL (CAS Latency), followed by a number like 30 or 40. Those are not worth Apr 24, 2022 · On the last Gen, DDR4 RAM kits, we can see CL timings from somewhere around 14 to 18, but on DDR5, on an average 5200 MHz kit, we see CL timings of 38! But why is it so? And why are we still seeing performance benefits? Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech. So, the question becomes, will mixing the different Cas latencies cause stability issues? If not, great! Feb 1, 2025 · Find out if the Corsair Vengeance Black 64 GB RAM (model CMK64GX5M2A4800C40) is good for gaming and professional tools. Is 6000 30-40-40-96 better than 32-38-38-96 which is better than 6000 36-36-36-96? I know initial latency is lower but aren't the row/column selects slowing it down? Or is 5600 30-36-36-89 better due to the slightly faster full cycle rate? Or am I wasting my time deciding and just grab the cheapest? So confused. My assumption is that it would be minor in most cases. For example: I know the DDR5 spec is between 4000 to 6400Mhz, but I've heard that you will get better performance out of an 8200Mhz kit with a high latency (38) than a 5600Mhz kit with a lower latency (28) (all other things being equal, such as memory channels, capacity, etc). CAS Latency (Column Access Strobe Jul 13, 2025 · In fact, according to Crucial, standard DDR5-4800 memory with 40 CL only adds about 3% more system latency compared to DDR4-3200 with CL22 – a negligible difference in gaming. It was curious to see 12th gen support both ddr4 and 5, but hey, a company needs to make sales right? So that's what they did. We looked into how these speeds impact performance in gaming at four resolutions and a wide range of application workloads. Learn how CAS Latency affects your PC's performance, especially for gaming. Consumers often prioritize CAS latency for a balance between speed and performance in their systems. Mar 18, 2023 · With 13th gen, frequency is everything, so with nearly every benchmark higher frequency is better. 3200cl16 ddr4 will have the same latency as 6400cl32 ddr5, but the ddr5 will actually perform the work twice as fast. Feb 9, 2024 · Lower CL values indicate faster response times, resulting in improved system performance. This blog post will Hi, just asking how impactful the latency is on performance. Therefore, it is crucial to carefully evaluate your budget and performance requirements to determine the most suitable option for your system. Compatibility: Ensure your CPU and motherboard support DDR5. So 40 CAS latency on 5200MHz ddr5 means 40 cycles at 5200 MHz, which is 7. Long answer: CAS latency is often misunderstood because of its naming convention, but it’s only half of the true memory latency equation. DDR4 typically has a latency of 16, whereas DDR5 will have at Feb 22, 2016 · For AMD, I think it's less of a DDR5 sweetspot, than FCLK sweetspot and whatever memclk it would happen to imply for minimum added latency. May 12, 2024 · CAS latency is how long you‘ll be waving your money around to get the bartender‘s attention. Jul 1, 2022 · You guys should look for high frequency over latency. Jun 9, 2022 · As with DDR to DDR4, memory bandwidth, latency and latency are also decisive for the classification of the speed of the current generation DDR5 memory in addition to the effective memory clock, which should correctly be specified in MT/s . Mar 16, 2021 · Both memory modules feature an eight-layer PCB, CAS Latency (CL) of 40, and a 1. Which motherboard? Intel only guarantees a transfer data up to 4800 MT/s on this cpu. I have been looking into getting some decent ram for my build, and my friend recommended g skill flare with same MHz and latency as another one but different timings, the other one I found was a corsair vengeance, having the 30-36-36-76 timings and being $20aud cheaper, out of the two timings/ram models which is best? Feb 1, 2025 · Find out if the Crucial Desktop Memory 16 GB RAM (model CT16G48C40U5) is good for gaming and professional tools. Jan 30, 2024 · So, I thought I would just grab another kit of 64 GB, but when I went on Newegg I saw that they no longer sell the same RAM kit with Cas latency 32 timings, the only ones left in stock are the ones with Cas Latency 30 (30-40-40-96) timings. Mar 28, 2025 · For instance, the Corsair Vengeance DDR5 equipment (one of many cheaper reminiscence modules obtainable) includes a CAS latency of 40 (or CL40) with the complete timings for the 5,200MT/s equipment being 40-40-40-77. 32-39-39-102 OR Corsair Vengeance 32GB (2 x 16GB) DDR5-6400 PC5-51200 CL32 Dual Channel DDR5-6400 PC5-51200 CAS Latency 32, Timings 32-40-40-84 I'm assuming the lower the timings the better and cas latency not as big of a concern in ddr5? Any help is appreciated! Remember, the lower the value, the better, so going for DDR5 with a CAS latency as low as CL36 or CL34 is ideal, especially for games that are extremely sensitive to latency. DDR5 (Double Data Rate 5th Generation) is the latest standard in RAM technology, offering significant improvements in speed, bandwidth, and efficiency compared to its predecessor, DDR4. Mar 2, 2025 · Unveiling the Best CAS Latency for DDR5 Memory Modules The world of DDR5 RAM is advancing rapidly, offering better speeds and reduced latency compared to its predecessors. Should we chase lower latency at a higher price? Between a 5600Mhz CAS 40 and a 5600MHz CAS36, how significant the performance diff would be? Mar 28, 2025 · Discover the ultimate guide to Best DDR5 RAM in 2025: Uncover the perfect balance between speed, latency, and price for exceptional gaming and productivity performance. For example, you should just ignore any DDR4 RAM below 3200MHz or above CAS latency 18. Understand what CAS Latency means, how it compares to RAM speed, and how to choose the best CAS Latency for your setup. 5600 cl 46 is , ummm, not good. Latency goes hand in hand with CPU architecture overclocking also. He made the video because he was actually getting annoyed with people acting like CAS Latency of their RAM kit was a big deal. What is it and how much does it matter in a gaming PC? 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. Thanks in Apr 18, 2023 · CAS latency refers to the duration it takes for RAM to fulfill a data access request initiated by the CPU. Ideally you'd have a good mix of both. However, there’s not much of a point in going over 7200mhz For amd, ddr5-6000 is what you want. Aside from the latency difference, the former uses Samsung ICs and the latter uses Hynix ICs. The parts supplier that I prefer to buy from, only have a few options available. While DDR5 RAM is newer with better storage density and power efficiency than DDR4, it tends to have higher CAS latency. fmwk xmoja mghaph itpha cgopcj mzpxe trmg biygvz wgwr okfl