Wondering real world performance differences between faster but higher latency vs slower but lower latency? Even if the RAM latency did make a difference, the CAS latency is measured in nanoseconds and isn't even the effective latency because of how RAM works . Latency. 3600 could work, especially if the ram kit is on the motherboard compatibility list. You can take a look at this article that looks at performance of intel 12th gen with different RAM speeds. RAM latency vs speed upgrade question r/Stunfisk is your reddit source for news, analyses, and competitive discussion for Pokémon VGC, Smogon, and all other Jun 17, 2011 · So ram A is 2133mhz, but has CAS latency timings of 9-11-11-31 and a 1. With all that said, if using Samsung B-Die memory, you can overclock speed & tweak/lower timings and lower the latency further. Was thinking of going DDR5 when I upgraded last month, but couldn’t pass up that Black Friday deal at microcenter for a i7 12700K + ASUS Z690 TUF D4. From what I understand when talking about RAM with Ryzen cpus and how faster = more better, the things to look out for are dual rank dimms, using one dimm per channel, and making SURE your CPU is capable of fclock matching half your ram's speed (ex: 3600mhz ram = 1800mhz fclock) as soon as your fclock and ram speed are not run at a 1:1 ratio We would like to show you a description here but the site won’t allow us. Skill DDR5 6400 with a CAS latency of 32. In your example 3200CL16 is faster than 2666CL14 because there's lower latency/higher speed. This is something you'd notice with GDDR5 on graphics cards btw. Given it's not a very mature technology, latencies are expected, and will be, high in the first consumer generations. You also need to take bandwidth into account. 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. 6000 MHz @ CL38 is 12. Or check it out in the app stores RAM Prioritization (CAS Latency vs. So the common wisdom is that if you have a choice between lower speed, lower latency vs. p. 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. I added 2x4GB Corsair Rams thinking they are CL 11. I have a question on the DDR5 memory. The speed is something you calculate out of the clock and the CAS latency. My score is running 4x8 trident-z (b-die) 3600cl16 at 3666cl14 and all timings from dram calc 'fast' setting, but geardown mode had to be enabled. e 3200cl14 vs 3200cl16 vs 3600cl16 vs 3600cl19 or whatever), I can't find it. The combination of RAM frequency and timings, especially cas, is what determines random access first word latency. 2v but it takes 1. Unsure about Zen 1 but Zen 2 & 3 greatly benefits from high speed RAM. 0. . And the PC speed (the bandwidth) is 25600 MB/s. According to RAM speed/latency calculators they should be exactly the same, so why does Ryzen perform differently? Because RAM clock speed determines the speed at which the Infinity Fabric runs. Speed) and Dual-Channel So in a thread earlier, I was reminded of u/Deadmeat553 's awesome Ram effectiveness chart which is amazing. I understand that higher speed can help with latency but at a certain point, very low CL just results in better absolute latency. That's the clock of the RAM. Not overclocking is Because DDR5 follows the same specification rules as DDR3 and DDR4, and as such latency scales well with speed. Ram speed and latency for 5600x comments. 19ns 2666 Mhz CL15 -> bandwidth = 21. Clock speed: Once you've got the amount you need, pick the speed (ensure your speed is compatible with your motherboard). So My old ram setup was 2x 4GB G Skill DDR3-1600 MHZ Ram with 9-9-9-24 timing. If I have a DDR4 3200MHz C16 RAM (16-18-18-36-64) you can compute the latency for the CAS 16 For DDR4 3200MHz the actual frequency is 1600 MHz . My main game is Warzone, which takes up a lot of ram, but I also do 1440p video editing so I definitely need 32gb minimum, yes with some rgb cause I’m basic 😭. Planning on building a computer but need some advice? This is the place to ask! /r/buildapc is a community-driven subreddit dedicated to custom PC assembly. I'm at 64, I've seen some 62's and 63's. Yes, back in the days when clock speeds were measured in megahertz, latency was a huge chunk of the RAM speed. We would like to show you a description here but the site won’t allow us. Theres a sweet spot for every CPU, try to be close to that and never above it in terms of clock speed. 13 ns delay, while a 16 cycle latency on 3600 MHz translates to 4. 2400 with my 6600K. I understand the high level idea of what each spec for the RAM represents but am not sure which to hold in higher importance with regards to tradeoffs between them. For gaming, both of them are plenty and lower latency is what will help with your 1% low fps. Performance will be similar in terms of memory bandwidth, but fclock will be slightly higher, so cpu performance will benefit a little more from higher speed ram. When comparing pure CAS latency versus transfer speed, you're looking at first word latency - yes, that can be important, but it's not the whole picture, and it is mitigated significantly by increasing cache allotments in the socket. Mobo says it supports up to 6600 MHz (oc) RAM but the highest I see on the QVL is 1x16gb @ 6000, and the Corsair website implies that the high frequency vengeance sticks are for use with Intel chips only. 00466 So my questions are: A) Are the two combinations of speed and latency posted above equivalent? What I do on PCPP is filter the ram at whatever speed and capacity I want and then sort by latency. 66 ns first word latency. RAM speed vs latency, whats better? Maybe i dont understand how ram works fully but there are 3200mhz ram kits with a 16 CL and then there are kits with speeds over 4000mhz bit with much higher CL. I wanted to know which ram would be faster for a build I'm making. higher speed, (slightly) higher latency - like DDR4-3200 CL16 vs. 25ns latency We would like to show you a description here but the site won’t allow us. 35v to reach 150% of We would like to show you a description here but the site won’t allow us. That's a measure of time, usually expressed in nanoseconds, and you want to minimize it. 3600 CL16 is 8. We see meaningful measurable bandwidth changes between e. To better explain, say that you are looking at two different set of Dimms, same die, same tested speed at 3200 and latency cl16, but one has a spd of 2133 vs 2666 for the other. 5600 MHz @ CL36 is 12. Which of these two options is "better" I can afford up to 32gb of ram, which is overkill, but fine by me since it's the smallest amount of ram I could get to fill up all 4 slots, which I would prefer to do, but not if it means I'm trading in performance just to look a little nicer. Here are a few examples: 3600cl14 latency is 7. Whereas ram B is 1600mhz, but has CAS latency timings of 9-9-9-24 and 1. Hello! Am currently doing research for my first ever PC build (budget build). Sep 13, 2020 · So, I can buy, for instance, Crucial 32 gig ram that is 3200mhz (slow) but latency timing 16 (fast) OR Crucial 32 gig ram that is 4000mhz (fast) but latency timing 18 (slow). For example for 4000 MHz CL20, the speed would be 10 nanoseconds. It shows a tested latency at 11-11-11-28, and a SPD latency at 9-9-9-24. Some people have been telling me that despite the two rams having identical true latencies, the higher speed of the 3200mhz CL16 ram provides more bandwidth and hence is the faster ram. . So I looked up the Corsair rams, as per screenshot. So 1/1600 MHz = 0. Also note that Ryzen doesn't use odd CL and the actual cycle latency will be rounded up to the next even number. From the recent videos I have seen on the subject the RAM speed doesn’t affect 5000 CPU as much as previous gen Edit: Don’t know why downvoted. So if you’re cpu has it’s infinity fabric ram at 1800MHz, you should have RAM that has a speed of 3600MHz (actual speed is 1800MHz, therefore it runs 1:1 with infinity fabric) I wouldn’t recommend either, because you can get faster sticks around the 3200MHz or 3600MHz mark with tighter timings (around CL15) for probably about the same Jun 30, 2022 · RAM Speed vs. 7800 and 6400 mt/s even though the infinity fabric is only wide enough for the theoretical bandwidth of DDR5-4400, and these differences accurately predict performance changes in real workloads. 75 ns latency. Lower latencies are better but generally higher speed ram = bigger latency. You want to compute latency in nanoseconds : latency = cl / (speed/2) : 6600cl32 -> 9. May 17, 2024 · What is RAM Speed? For the average PC builder, the capability of Random Access Memory (RAM) is measured by 3 key fundamentals: frequency, latency, and size (technically, size isn’t speed-related – but for the purpose of establishing what RAM is best for you, we’ll be covering it). This is especially important on Intel and lesser so on AMD, but still important for both to a degree (more important on older gen Ryzens). The RAM kit I ended up buying was the CMK16GX4M2A2666C16 but it is operating at base 2133MHz, while the original stick (Kingston ACR26D4U9S8ME) was operating at 2666MHz. The way I see it the second starts at 2666 1. Ddr5 6000 is only considered the sweet spot because the imc/uclk will stay 1:1 with the memory speed/mclk, allowing for the best possible latency. On theoretical values yes, but the practical reality of RAM is that it's idle a large fraction of the time waiting for some timing or other. Or check it out in the app stores Home; Popular Ram speed vs absolute latency So I just built a new pc with a 13900k and 32gb of ram (6000 and 30). Currently I am looking at these two options: Corsair Vengeance. Scan this QR code to download the app now. The architectural design necessitates high speed RAM/excessive amounts of cache to offset high latency from communicating across multiple CCX/CCD as the speed of RAM determines the performance of the Infinity Fabric which links these components together. What type of ram would be the best for mining? Higher speeds (e. You're mistaken in thinking that 3600 MHz would be the speed of the RAM. 3200MT/s CL 22 is 13. For a comparable value between different memory frequencies you have to convert it into its true value in nanoseconds. Also take into account (when thinking about these nanosecond differences) that there are 1 million nanoseconds in 1 millisecond. At 3200 you get the benefit of both more memory bandwidth and also faster infinity fabric speed, at the cost of higher latency. 35v to reach 150% of speed (3200). this is calculated like this: 1/((RAMspeed/2)/1000) x CL = random access latency. DDR4-3600 CL18 - pick the latter. You might get like 1-2 FPS difference in games tops. s Both rams are not listed on my motherboard's QVL here. 778 3600cl16 latency is 8. The 2133 result does not control for bandwidth or Infinity Fabric speed. 625 ns (duration between clocks) A 19 cycle latency on 4600 MHz RAM translates to a 4. s My motherboard's maximum ram speed is 3433Mhz so I don't know if I'll be able to fully utilize the Just looking for some insight on RAM speed vs timings vs latency. RAM speed vs latency I was reading this article (warning: full of affiliate links) when I saw the "Corsair 32gb DDR5 5600MHz" RAM and thought "hey, that's a decent price". You also need to look at the CAS Latency which is how many CPU cycles it takes for the RAM to serve data once requested. r/nvidia. 44 ns, which is a longer latency even though the CL number is lower. 888ns latency. Skill ram in the 4000-4400 speed range but am a little novice towards which timing kits would be the best for the money? CAS latency is measured in clock cycles and is therefore dependant on the frequency of the RAM. as in CL (CAS) which still having more mhz. Can anyone clarify? Just bought a 7950X and ASRock x670E Pro RS. Overclocking ram speed vs latency (AM5 build) Im trying to choose ram for my new AM5 build, and my current shortlist is between G. If CL is basically the transaction times wouldnt you want to shoot for the lowest timings there or is it offset by the faster speeds? Ram Memory Speed vs CAS Latency The two corsair ram options linked below are almost identical from what I can tell except the top has 3200 memory speed but also only has 16 CAS latency while the other has 3600 memory speed but 18 CAS latency. I think in general looking at what is actually on the market, higher clocked ram is going to be bette for Ryzen than low latency ram though. 35v to reach 120% speed (3200) while with the slower spd dimm it takes 1. With RAM a higher MHz doesn't always mean faster RAM. Bandwidth is calculated by taking RAM Speed (MT/s) and multiplying by eight (because RAM data is transferred on a PC bus of 64 bit width, which equivalents to 8 byte). Get the Reddit app Scan this QR code to download the app now. 25ns I'm looking to upgrade my RAM and I'm having trouble understanding the exact benefit to higher speed (MHZ) and high latency (CL) RAM vs lower speed and low latency ram. and they only come in 8GB or 16GB sticks, limited to 32gb (either 8x4 or 16x2) on default XMP. So I don't know if it will work on my system as well. 3000CL14 - pass ram stability tests 3200CL16 - pass ram stability tests 3200CL14 - fail ram stability tests, not prepared to try and tweak further higher voltage etc. Frequency and bandwidth both play a role in determining RAM speed. Intel RAM Speed vs Latency & price differences About to build my first PC (with a 10850k), and after some research, I narrowed it down to a couple of 32 GB ram RGB sticks from G. For factorio purposes they still are slower than top speed gear 1 DDR4, at least for now. GL The system is a prebuilt Acer desktop, the BIOS does not support XMP. The CAS latency is the number of clocks that the RAM takes for doing an operation. Which is more beneficial for XOCing, speed or timings or latency? I’ve been looking at C17 or C19 G. I saw some Ryzen benchmarks reporting 3200MHz CL16 RAM to be faster than 3000MHz CL15. 189 Use the RAM latency calculator. From what I understand, you can take the timing / speed and get a good metric of how fast your ram is. I don't have any options because there's no stock of RAMs here in our country. More cache is why the 12900K (and KF / KS variants) outrun the 12600K and 12700K, and why the slower R7 5800X3D Ryzen is very memory sensitive, loves high speed, low latency memory, and offers some nice gains with memory tuning while Intel offers much less gains by comparison, but there are some gains to be had. 2133 Mhz CL13 -> bandwidth = 17. Latency: There are some calculations to perform to understand which is the fastest option. memory speed and or latency will net you few more frames some times more depending on the case, but generally its not a huge jump . Today, DDR3 is so mind-bogglingly fast that latency shouldn't matter anymore. Since the last BIOS update (1. 2*(latency-0. Optimum tech video, he compared low speed ram vs 3200 vs 4000 and find not much more with the high tier ones 🤷🏼‍♂️ The last question I have is regarding the "CAS Latency", which I've also seen mentioned as something to consider when purchasing RAM. 3200 CL14 is 8. P. 3GBps; latency = 11. 75 ns 3200mhz is an ez frequency to reach on zen 2. I am deciding between G. Also you can always overclock your ram, especially if they are high end like those mentioned. so this is out of the choice of options. Skill Trident DDR5 5600 with a CAS latency of 28 or G. I then just pick the right combo of price and timings. 1ns, CAS latency 20. It’s worth noting that many people referred to RAM Speed in MHz terms, such as RAM Speed: 3200Mhz. Building a PC for gaming only, I will be playing at 4K ultra. The former is measured in MT/s (Megatransfers per second) and the latter in nanoseconds. I haven't seen anyone break under 60 (aida64 latency), but lots of people getting close. I mostly play Fortnite and trying to push the most fps at 1080p with minimal frame drops. Here FPS scales even more against latency. May Using a i5 12400f with crucial ballistix max 4000mhz ddr4 On a asrock B660 pro rs, can't go higher then 3600mhz on the ram otherwise it hard crashes, can't set the ram voltage 0,5V higher otherwise the pc won't boot, I had to Reaset the bios Now my 4000mhz ddr4 ram runs fine at 3600mhz But for some reasson I cannot control my rgbs of the ram Any ideas, what I should do, maybe get a new one Overall as far as starcitizen is concerned for now, its all about cpu speed and maintaining that speed. Frequency matters a bit more because it gives you more room to play with, but it's like 60/40 frequency/timings. Welcome to the official subreddit of the PC Master Race / PCMR! All PC-related content is welcome, including build help, tech support, and any doubt one might have about PC ownership. Fastest ram for factorio is basically DDR4, 4000mhz CL 14. (It's here by the way, if you want to take a look) I was stuck at the computer, so I wanted to see what DDR4 kits were available on the market and which ones had the best effective latency. The two kits you mentioned: 14 / 2400000000 = 6 ns 16 / 3333000000 = 5 ns On paper, the 3333 MHz RAM wins. speed: 6400 MHz CAS latency: 32 The formula for figuring out the true latency (as opposed to CAS latency) is: CAS latency / clock speed. Skill Ripjaws S5 DDR5-6000 WH C30 or 5600 C28. So unless an application prefers lower latency over both higher bandwidth and faster infinity fabric, the higher speed, higher latency is probably faster. But I know the price also goes up as the CAS goes down and frequency or speed goes up. tl;dr: I'm having troubling untangling the relationship between RAM speed and CAS latency for Ryzen 3000, and if there are any benchmarks that show actual performance differences in how those things interact (i. 65v. 6-1. Ideally you want RAM such as 3600MHz at CAS latency 15 or 16 which is in a happy place. In your case, if you can actually get DDR4-3600 CL14 for the same price as DDR4-3200 CL14, just get DDR4-3600 CL14. 00468 cl 14 / 3000 mhz = 0. 5v I know those are the deciding factors in choosing ram, and am under the impression that lower latency timings can outweigh the actual speed of the ram. 85 ns first word latency. (obviously a small difference, but this one is faster) May 14, 2020 · You get higher access speed with no loss in latency. skill I think would be okay to pick, as they also work with Aura Sync without additional software I believe. I am planning to try to overclock it with buildzoid's timings, and according to a HUB video the performance should be basically identical with his secondary timings Which ram should I choose and why? Thank you! P. 3200mhz at cas 16 vs 3000mhz at cas 15 is going to be indistinguishable. But then I noticed they have a CAS latency of 36. I don't really want to run into too many issues with crashes, so I was a little apprehensive to go with the higher speed memory. You want high bandwidth and low latency, that's why I like to do perf = speed / latency. From what I understand, the challenge with high RAM speeds is that latency becomes harder and harder to get right, so my question is: should I prioritize RAM speed over latency for optimal graphical performance and Have I understood how this works correctly? We would like to show you a description here but the site won’t allow us. 806), and the R 2 value becomes tighter. r/nvidia (New reddit? Click 3 dots at end of this message) Privated to protest Reddit's upcoming API changes We would like to show you a description here but the site won’t allow us. Lower ns is better, so 3200CL14 is slightly better latency. speed: 6000 MHz CAS latency: 30 Timing: 30-36-36-76 G Skill Trident. g 3600mhz) or lower latency with a lower speed like 2000mhz? Because the lower the speed, you will have lower latency from the ram to the cpu right? and if you have and the higher speed, the higher latency you will get. Running at 3733mhz, my random latency is 67. Going to buy the RAM next, looking at 2x32gb 6600 vengeance. id be really surprised if ddr 5 first batch of chips bring home double digit frame increases. Feb 7, 2022 · The RAM Speed is 3200 MT/s. 75ns latency 2666MT/s CL 19 is 14. I have my ram timings set to 18-19-19-38, and I never change this during this test. On aida64 the latency is 70ns for 3000CL14 and 74ns for 3200CL16. So I got a question that I can't seem to find any answers on. So, if you're a set and forget person, 6000 is the sweet spot. While memory speed (or data rate) addresses how fast your memory controller can access or write data to memory, RAM latency focuses on how soon it can start the process. "For gamers, DDR4-3200 CL16 and up will do pretty well" It seems like your ram speed should be perfectly fine, but if you are worried about performance, it is definitely more of a priority to get dual channel memory. 444, CL34 DDR5-6000, FWL10, CL30 I'm going to assume the first one is significantly better, but I'm not sure if the 4 lower CL of the 6000 ram would make a more significant impact than the 1200 Speed difference of the 7200, or if the 30 dollar price increase for what might be almost 0 change would make the 7200 We would like to show you a description here but the site won’t allow us. Sear h for best ram configs for your CPU, its all that mattters. DDR5-7200, FWL 9. 7B) , 7600mhz RAM is now possible. 7 ns first-word latency 5600cl28 -> 10 ns But latency isn't the whole performance. Let's say there are two RAM set ups DDR5 5600 RAM speed/cas latency/2 sticks vs 4 sticks. 889 ns 3600cl18 latency is 10 ns 3200cl14 latency is 8. I know that lower is supposed to be better, as there is less latency, but I've noticed that most of the higher speed RAM comes with slightly higher latency? RAM Speed vs Latency? Build Help I can choose between two different pairs of 8GB RAM - one pair is 3200MHz, first-word 10ns, CAS latency 16, and the other is 3600MHz, first-word 11. However, you can force uclk to match mclk and go up to 6200-6400 ram without a latency penalty. To better explain, say that you are looking at two different set of Dimms, same die, same test speed (or xmp) at 3200 and latency cl16, but one has a spd of 2133 vs 2666 for the other. g. Speed. The 'best' speed for a 3600 is the same as for any Ryzen 3000 CPU: that's 3600Mtps clock speed with synchronized infinity We would like to show you a description here but the site won’t allow us. If we have that result removed, the regression becomes FPS = 3859. 0GBps; latency = 12. DDR5 work on Gear 2 which is slower than gear 1. Lots of factors to concider - higher speed is higher bandwidth, more data sent per second. To my surprise my motherboard and CPU-Z is showing that my ram is running at 9-9-9-24. With that logic, would a 3000 mhz ram at CL 14 not be about the same speed? cl 10 / 2133 mhz = 0. Then again, if you're on an AMD X3D CPU, it doesn't matter at all. Higher-quality, more expensive RAM has lower latency, and both this rating and the RAM's clock speed can be overclocked by enthusiasts. Same here. Reply reply I know speed and cas latency are both important in deciding, and I’d ideally not want to spend more than £200. When looking at RAM I am quite confused about difference between SPD speed & tested speed and have had trouble finding decent explanations online. 4 (measured in Ryzen Dram Calc) On a whim I decided to drop it a step to 3666mhz. If this is true, how much extra speed is needed to compensate for a higher true latency? I'm currently using 2133mhz CL13 ram which has a true latency of 12. While the RAM you mentioned is 4800MHz which is obviously faster then a stick of say 3600MHz DDR4, it has a CAS/CL (latency) of 38 vs 14-16 in a standard stick of DDR4. Linus Tech Tips - Reddit vs PC Part Picker vs LTT Forum – Where Should YOU Go for Build Advice? November 18, 2023 at 09:50AM RAM Speed (MHZ) vs Latency (CL) Feb 9, 2023 · Lower latency means faster data access, thus faster data transfer to the CPU, and faster operation of your computer overall. mi rh zw lc bw pp we aj kj xq