Trfc ram B die ram can go as low as 240 trfc, probably even 230s. I don't know how It's the default of your ram/board. Went from 350ns to 173. Skill Ripjaws V Series 32GB (2 x 16GB) DDR4 3600 CL16-19-19-39 1. Kit is G. ️ How the memory layout work with timings. Certain timings might have different effects on different workloads. On the left side of table are columns, representing RAM IC. Learn to overclock, ask experienced users your questions, boast your rock-stable, sky-high OC and help others! Aug 4, 2022 · There the temperature reduction can allow a slight increase in peak clock speeds. Critical for memory stability, especially in high-density modules. Learn the definitions and differences of tRFC, tRC, tRCD, tRP, tRAS and other memory parameters, and see examples and tips from experts and users. 2 2TB 980 / MSI X670P - WIFI / 360mm AIO by deepcool I am new to this I've met set changes to the bios from disabling things and PBO settings and Dram voltages Apr 7, 2021 · What's important is the name. and Ashes of the Singularity Feb 1, 2023 · Hello everyone. asus prime b450mk ryzen 5 3400g 16gb ddr4 3000mhz hyperx fury rgb zalman wattbit 500w 83+ what do i do to lower it and the pc doesnt crash, idk what to change cuz there are many ram timing Row Refresh Cycle Time (tRFC): The time needed to refresh a row. That's a ram setting, universal, not subject to renaming at all. However, my UEFI also asks for values for tRFC2 and tRFC4. With this you should easily be able to run 3800CL14 280 TRFC (54/56ns). Mar 20, 2019 · Memory overclocking has a significant impact on performance of AMD Ryzen-powered machines, but the alleged complexity of memory tweaking on this platform, largely fueled by misinformation and lack of documentation, has kept some enthusiasts away from it. Models PVS464G320C6K and PVS432G320C6 (Same specs for speed and timing. I usually go with 3200CL14 2x16gb. It controls how often RAM refreshes the data. However, I recently noticed something called tRFC 990 (I am a newbi to oc) in HWINFO summary. This guide is to supplement existing DDR4 overclocking guides whos knowledge was combined with the experience of overclocking the DDR4 kits listed below. Above, the timings are specified in ascending order, whereas below I have them listed in operational order. If you have a tRFC of 1000 and a tREFI of 10000, 10% of the time your RAM is refreshing (refilling the capacitors) and therefore unusable. trade off potentially needing higher voltages -On Ryzen 3000 and 5000, 1usmus suggests 28Ω - 40Ω. Same goes for aftermarket ram-fans and ram watercooling solutions. With a sprinkle of simple/cheap DIY solutions if you don´t mind (zip ties and vhb tape ftw). All things overclocking go here. Input frequency and timings to analyze activation, read, precharge cycles, and optimize performance. Skill with different IC's as an example. It has a nasty tendency to manage to pass stress testing for days when it's on the edge of stability, and unstable tRFC is most often what ends up causing OS/driver corruption. So while naming order might be a little floppy, the actual names of the values are good. My 3000Mhz kit has a minimum tRFC rating of 374 at stock, but when you push it to 3000Mhz the tRFC is supposed to be 525. Going +600Mhz on the frequency and another -100 on the tRFC at the same time seems extreme. It can be felt, specially when your ram is "b die". The values for tRFC (ns), tRFC, tRFC2, tRFC4 were the same as stock. There is no stability issue yet (over 1 month of usage). The tRFC timings are very dependent on temperatures, as they are related to capacitor leakage, which is affected by temperature. I also made it calculate the normal tREFi cycles for the standard 7. tREFi is the counterpart to tRFC, with the value set determining how many clock cycles must pass before the next memory cell refresh occurs. Different types of ram dies have different limits for how low tRFC will go. tREFI depends on temperature. Secondary and tertiary timings (except for tRFC) don't really change much across frequency. A Clearer Guide to RAM Timings Most resources on RAM timings rely on engineering-heavy explanations from JEDEC specifications. Some kits will default to 350ns of trfc latency, some do 550ns ( i think the 16gbit ram's do 550 and the 8gbit do 350 as default) 990 clocks x 2000 / 3600 = 550ns Most ram can go quite a bit lower than 550ns on trfc. Reducing the voltage of your RAM, especially after increasing it at the start of the overclocking process, simply decreases the risk of hardware death and reduces running temperatures. 4 were DOA. (and read) BTW, do I need to change the trfc if I change the mhz of the ram and fsb? Can I lower it to get a similar Jun 9, 2011 · 1. Set the trfc manually if you want to reduce latency, if you let the board "do its job" it will set a trfc of 350ns which is like 600odd trfc because that's what it does when its not told what speed to run at. Jun 2, 2023 · The real ratio that matters is tRFC to tREFI. tREFI increases the DRAM's sensitivity to temperature as the hotter the DRAM is the faster the charge stored in the DRAM's capacitor leaks. The program in question is now stable but I can see from benchmarking tools that it does tRFC is the number of cycles for which the DRAM capacitors are "recharged" or refreshed. In my bios I h Jan 24, 2022 · With tRFC 576, i already calculated a value for your RAM that should be safe. Depends on the RAM IC for example Samsung B-Die can have very tight TRFC as mine is totally stable at 277 TRFC with a speed of 3466mhz. I installed the recommended RAM but, compared to my stock RAM, the only changes were to tRRDS, TRRDL, tFAW, and tSTAG. You might need to spend some time to find a good timing for your ram, if you cant get a lower Primary timing, try by lowering the secondary timing. Try tWR=48, tWTRL=20, tFAW=20. I use 48000 and RAM temperature max is 42Celcius. Hi, I overclocked my 6000 kit on AM5 to 6200 Mhz and I just started tweaking the easy timings that I copied from bullzoid. The problem Hey, I made a simple ram calculator since I was kind of tired manually calculating tRFC1 to nanoseconds when changing frequencies. The only solution is to invest in a bdie kit, the cheapest if possible. Previously they were (tRFC2 - 192/tRFC4 - 132). Explanation to several of the key timing parameters in DDR4 memory like CL, CWL, tREFI, tRFC, tDQSS, tCCD_S, tCCD_L and many more Dec 12, 2020 · DDR4 tRFC effects on avg. DRAM Timing Configuration Parameter Description Tcl CAS Latency Trcd Row Address to Column Address Delay Trp Row Precharge Delay Tras RAS Active Time Trc Row Cycle Time Trfc Refresh Recovery Delay Time Tfaw Four Activate Windows Time TrrdS Activate t Oct 13, 2020 · So I've been working on dialing my RAM down in @ 3800 CL14. tRFC=384 too. Hello guys I have a 12900k + 3070ti paired with g. Simulate RAM timings and execution scenarios with our RAM Timing Simulator. In line to the top of a column is lowest value of tRFC a RAM IC will support. higher settings of ProcODT can lead to more stable RAM. Apr 18, 2022 · RTX 3070. The primary timings have the most effect on how responsive games/apps feel. It might be hard to see. I ran DRAM calculator for Ryzen and below is what it's suggesting. Aug 25, 2024 · Hello, I have a set of Crossair DDR5 6000MHZ rams 32GB and I wanted to optimize my timing's my components are 7800xt / 7800x3d / m. How far can I push tRFC, tRFC2, and tRFCsb, or is it too low already? AIDA64 results Mar 4, 2016 · Though, when I check out the memory specs in CPU-Z, it shows the tRFC at 416 clocks Is that right? I'm not an expert on memory timings, but I've never seen something that high, but then again this is my first DDR4 build, so I'm not sure. Aug 14, 2020 · For my memory Dram Calculator suggests a tRFC of 480 or an alternate of 445. That ratio is the percent of time your RAM is unusable for any sort of data operation. I recently upgraded my RAM to 2 x 16GB @3000mhz (mismatched sticks) and managed to run them in dual-channel @3600mhz. . 5% of your time Apr 22, 2025 · Refresh Cycle Time (tRFC) tRFC is a very important timing in the secondary timings and is always tuned when we’re tuning the memory. It is also very dependent on the DRAM temperatures overall. Also, tCWL, tBL/BC, tRC, tREFI, and tRFC are written in order of operation, or where they'd fit in the operation, but the rest are as I find them. However you may need additional cooling as 3800CL14 requires 1. skill 3600 CL16 32go (16x2) b-dieI'm trying to OC it and since i'm pretty new i'm doing a lot of tests and resets. Aug 9, 2020 · And you can push your ram to its limits but 160-175ns is the butter zone. These remove 10 nanoseconds. It's because they (tRFC and tREF) directly indicate characteristics of electrical working mechanism of a memory chip. 128GB DDR4 3200 cl16 ram. Jul 2, 2021 · Maximize RAM Speed EXPLAINED: Common Mistakes to Avoid & FREE Performance Boost! Overclocking RAM Starters Guide For SAMSUNG B-Die DDR4 Memory! Windows 11 Is a Lost Cause. (16-20-20-40) (tRC 74, tRFC 880) Ram is: RAM Patriot Viper Steel Series. "Temperatures and Its Effect on Stability Generally, the hotter your RAM is, the less stability it will have at higher frequencies and/or tighter timings. I can push it down to around 450 before I start getting memory errors. That prepares to test the 10 most bought sticks 3x ways to see how much they are beeing held back by Jun 9, 2011 · 1. Jan 21, 2022 · Hey guys, decided to try messing around with some ram timings and I'm a bit confused on where to put a some timings. But right after that I would say it's trfc for sure. If you double your memory's speed, for example, the cycle time would have to double, but the absolute time would remain constant. Jan 2, 2025 · So if comparison is the name of the game i´d like to see aftermarket heat spreaders tested to find the best / even tempered one. 333 after tweaking it. It took reseating the sticks many times to not get errors running memtest. So my 1st question is in this Disable windows 11 security features like core isolation, memory integrity, hyper-V. The higher the density of the chips on the module, the longer the refresh has to be, and therefore the higher tRFC has to be. I recently purchased a ASUS ROG Strix G15 Advantage Edition laptop and one of the performance recommendations was to upgrade the RAM. Specs: Case: Fractal Design Define S PSU: CoolerMaster V650 Mobo: MSI Z170-A G45 GAMING CPU & HSF: Nov 29, 2017 · Lower tRFC till it wont boot, start with 400, then 350, 300, 290, 280 etc Go back +1 tRFC till it boots, like 280, 281, and 283 boots, and thats ok for now if it crashes later on during tests then you just bump it by +1 Lower memory voltage till it wont boot, go back by one step Shut down PC Lower SoC voltage till it wont boot, go back by one step Jan 2, 2025 · A lower tRFC value results in less time spent during the refresh, but if you set the value too low, the memory cells do not have enough time to fully refresh, resulting in data loss. How much lower can I go before running into serious problems? How does tRFC calculate the actual numbers? Jan 4, 2013 · On the main page, the Ryzen DRAM calculator recommends a tRFC value of 288 for my RAM. TRRD Options 0 to 15, around 10 is where most leave this, no big effect on performance. Because capacitor charge loss is proportional to temperature, RAM operating at higher temperatures may need substantially higher tRFC values. A 1T command rate offers better performance but may be less stable than 2T. Nov 12, 2020 · When i learnt that the lesser the TRFC the better then i found out i cant lower it less than 465. Jun 17, 2011 · A discussion thread about RAM timings and how to optimize them for performance. Aug 24, 2004 · For tRFC values reference this table, sourced from Reous's/HardwareLuxx members thread. Definitely. 45/56 volts. Feb 14, 2022 · Hopefully that was less boring than my usual content, and you guys also got a glimpse of the type of random shit that pops into my head on a daily basis lmao. My question is about "tRFC" and "tRFC (alt)". I've been using 445 for several months but recently found a program that crashes Windows when at 445 so I switched to 480. We want to change this. 35 with xmpwhat do you think about my trfc ? i saw some people going from 630 to 48, others 400. Those Also, running your tRFC slightly too low is a great way to drive yourself crazy. This kit is Hynix A-die. Dec 16, 2018 · I think it's well within it now. tRFC is the length of time the memory is essentially locked while the voltage in each cell is refreshed to prevent data loss, and tREFI is how often the refresh process occurs. tRFC (row refresh) is something that must occur in absolute time (ns), but must be expressed in cycle time, as frequency is the method of determining absolute time. Options are 20 25 30 35 and 42. If your memory is Micron IC based you may be able to go as low as 20, everything else we have found 35 works best. This is mine. Super PI Note that among ram timing items only tRFC and tREF are indexed by 'time unit' (second) while others by clock count (how many clock cycles (= inverse time unit) are consumed for a ram timing's operation). tCL, tRFC, tRFC (alt) etc will be identical. For me it's the difference between turning the camera smoothly and a "suttering" camera that doesn't respond as quick and as smoothly. Feb 10, 2020 · Hello i successfully overclocked my DDR4 Ram to 3800 Mhz from 3600 Mhz also overclocked the timings using the Dram Calculator 1. What does the tRFC ram setting do and how do I set it? With a higher tREFI the reduction in this metric from lets say halving tRFC is lessened. For example, DDR4 3200 16-18-18-36. 7 latest version however 1 part in the dram calculator it shows the TRFC Value default is 374 and the overclocked calculator value is 504. -playaround with ProcODT if you can't boot. I looked This easy comprehensive guide illustrated with images is for the overclocking DDR4 using several brands such as Corsair and G. 35V Dialed down 2 & 4 and left the main tRFC set to AUTO. 1% low FPS @ 3200Mhz. Our guide simplifies these concepts with real-world examples to help you understand: ️ What CAS Latency (CL), tRCD, tRP, tRAS, and tRFC actually mean. I've run into an issue though where Im having to run significantly higher TRFC than I did at 3733 so much so that I'm basically offsetting all my latency gains from jumping up in frequency. Mar 17, 2015 · For tRFC, it also all depends on your modules, the chip density on the modules, and the frequency the RAM is running at. Jul 2, 2018 · stub Frequency is the most advertised spec of RAM. de did an article showing the effects from various timings here. If you're down at 500 tRFC or even lower (250 is possible on some DDR4), you're then only spending 5% or 2. I already lowered some stuff but I am not sure what else I could tweak/test. 8microsecond refresh interval. 8 μs (microseconds, from mikros = small in Greek). Jul 20, 2021 · You need to know the basics of how ram timing works, The primary timings (the CL), secondary timings (subtimings), and teritary timings. obviously 42 is very lose and will allow higher overclocks. Is it safe to modify this value? It's default at 160ns. Reous at hardwareluxx. You might gain a bit more due to natural "silicon to silicon" variance, but won't beat it by wide margin. *** edit *** Jul 23, 2025 · You can view the following DRAM timing configuration values: Table 1. And tRFC, generally speaking, scales with DRAM density as the more cells you have, the longer it takes to refresh all of them; though this isn't always reflected in the JEDEC definitions. My current ram is 3600 C14 corsair dominator 2x16gb. ) I had to go through 8 sticks of this RAM to get 4 functional. tREFI however also reduces power output and thus temperature as the DRAM consumes more power when refreshing then If yes, then high trfc is definitely holding you back, it is the limiting factor. Command Rate (CR): The delay between when a memory chip is selected and when the first active command can be issued. tREFI on the other hand (the interval between refreshes) is always officially deemed to stay the same 7. BTW, the values are in the really big crowded spoiler in the OP thread. RAM speeds don’t adjust with temperature like that, though. When I was at 3733 I was able to run the 140ns TRFC equivalent. when you are refreshing, you are completely locked out from doing anything with the DRAM, so there are some scheduling tricks you can use. Truly Destined for the Jan 15, 2007 · DRAM TRFC simple rule for this option. , 1%low and 0. We found this out the Feb 17, 2024 · For instance, if tRFC holds at 450 at temperatures above 55°C, the user can set level 1 tRFC to 423 (<45°C), level 2 tRFC to 436 (<55°C), and level 3 tRFC to 450 for the worst-case scenario. As anyone who’s dug a little deeper knows, memory performance depends on timings as well--and not just the primary ones. I would like to your advices on the timings but also tRFC currently my 3600 basics timings are : 16/16/16/36Voltage 1. You'd follow the main settings as in your picture, then open up sub-timings to get the rest. It is also dependent on dram voltage. But sometimes it's even just DDR43200C16. And trfc from the bios goes from 90-350. cpeyt ehiqw ttvkf nxcpjbe cbfclkve afchiq wlznw tehjr lslbsf ekjaj oukx gqjpu hzpwat djczs flww