Fclk frequency for 3600mhz ram. Im facing 2 possible solutions so far. The FCLK is the speed of the memory controller, the Infinity Fabric and actually the RAM memory, however the RAM memory is read twice per cycle and therefore FLCK of 1600 is DDR@3200 speed. Also realize that '3600MHz' and '4000MHz' run at memory clock frequencies of 1800MHz and 2000MHz respectfully. for 3600 MHz RAM (MCLK = 1800 MHz) it runs best when UCLK and FCLK are also 1800 MHz. I moved from 3700X to 5800X3D and my 16GB 3200Mhz ram worked without issues on XMP. Whether you’re a player searching for ⁢that one-upmanship, a material developer preferring ⁤smoother workflows, or a power user desiring a snappier system, understanding and enhancing the FCLK frequency is crucial. Used BIOS to manually set the Adjusted DRAM Frequency (3600MHz), timings (tCL17, tRCDRD18, tRCDWR18, tRP18, tRAS38) and voltage (1. Your auto settings were correct. It comes with timings of 16-18-18-38 CR 1T at 1. If you’re running 3600MHz RAM, your FCLK should be set at 1800MHz. My question is, is it better to aim for a higher frequency say 4000mhz or just tighten the timings for 3600mhz. But then I upgraded to a 32GB 3600Mhz and here I had to make a tweak, had to raise DRAM voltage from 1. Not 4000MHz like Lisa said in presentation. Additionally, the FCLK, UCLK and MEMCLK are all synchronised together, so you should always maintain a 1:1 ratio. The fastest FCLK you can achieve without WHEA or memory errors with 1:1 is the sweet spot. 35v). Or, in other words, FCLK = MCLK = 1:1 = RAM frequency/2. For the perfect balance between performance and stability, it's usually best to stick closer to 3600 CL16 and an 1800 MHz FCLK. Jun 5, 2023 · In Zen 2 architecture, FCLK frequency is tied to the memory clock speed. Just want to get the highest possible memory frequency and then work on the timings. I've seen reddit posts about some 3600's not able to run 3600mhz RAM. See examples, benchmarks, videos and links to Google spreadsheet with calculations. DDR stands for double data rate, meaning the RAM is actually running at half of what it says it is (3600mhz = 1800mhz in reality). Jul 8, 2019 · Instead with DRAM Frequency fixed at 4333 MT/s, increasing FCLK from 1733 MHZ to 1800 MHz immediately shows a gain of 1. According to PC Gamer, AMD made their chips to support up to a FCLK of 1800-2000 MHz, but it seems to be largely YMMV because of build quality and silicon lottery. 5x, 2. I enable CPU GAME BOOST (which kinda change the PBO from auto to enabled)then I enabled XMP Profile 1, i then tweak the DRAM Frequency to 3200mhz (to make it run at the advertised speed?), then I change the FCLK to 1600mhz (half of the maximum ram). Jun 25, 2022 · 2133 ratio and 150 MHz BCLK Frequency -> RAM frequency is 150 MHz x 21. 3600MHz CL16 is the best value for Ryzen memory, it performs very well and doesn't usually need any tuning to get it to work. Download ZenTimings and link a screenshot of your RAM timings, and myself or others can look your timings over and give you some things to try. One more thing most ryzen cpus are not able to go above 1800mhz fclk. (XMP said it should be 17). Ryzen CPUs will default to a value that's dependent on the speed of your RAM. Click to expand Even after selecting the XMP profile to 3200 mhz and FCLK to both auto and 1600 mhz, I am still seeing the ram is running at 1330 mhz . This is the perfect balance of frequency and CAS latency. Increase it incrementally—small changes can have big impacts. 举个例子：DDR4 3200MHz内存实际运行频率1600MHz，低于FCLK上限的1800-1900MHz，因此实际FCLK运行频率就是1600MHz. For example, if the memory runs at 3200MHz, get the fclk frequency for 3600mhz ram. Again, Ryzen really likes 3600MHz with very tight timings, and getting a higher frequency than 3600MHz to run is an achievement. I'm pushing RAM and fclk settings because I rely on the Apr 30, 2023 · Hi I've switched from an AM4 PC to an AM5 PC. Feb 14, 2021 · En este caso, en el menú denominado OC el FCLK Frequency se encuentra en la parte de configuración de la RAM (DRAM Setting). What ever speed on decide to run your ram set your fclk to half of it. 75x 3x, etc) This is critical. Would it be less of a headache to just get 3600mhz ram or would purchasing 4000 mhz and tweaking it down to 3600 mhz if its not stable at 3800/4000 be a better route? Nov 10, 2020 · Infinity fabric at the moment goes to 1800MHz. 此时CPU和内存控制器之间的Data Fabric频率（FCLK）再减半，而内存控制器和内存之间的频率依旧保持不变。 There is no such thing as "base FCLK". Start by increasing it by 5-10 MHz. I'll try 3800MHz next. 35V. I now have 2x48Gb Corsair 5600Mhz and whenever i try to sync the FLCK, meaning using 2800mhz, the PC doesn't boot anymore. 00v and vddp to 0. So I would still take the plunge on it. Note that you do still have some leeway to change these values even when sticking to the 1/2 RAM rule. Jun 9, 2020 · For RAM frequency lower than 3200MHz it may be beneficial to set higher Infinity fabric than 1600 but you would have to experiment a little. Running FCLK at 1800 with a 3000MHz ram. Nov 6, 2020 · 3600Mhz Is the sweet Spot, And running 1:1:1 is what you wanna do with Ryzen, So if you get 3600Mhz ram, You can run the Fclk at 1800Mhz, Its really not up to the ram to run the speeds its the motherboard/bios Here is a good video for anyone wanting to learn how ram works, There actually getting 2000Fclk to just about everyone now, Check for One thing to determine is whether it is the ram at 3600 or the FCLK at 1800 that is your problem. Users share their experiences and tips on how to optimize FCLK settings based on RAM speed for AMD processors. O. If this is stable, then you ram is ok and the problem at 3600 is running your FCLK at 1800. You want the FCLK frequency to be half the rated speed of your RAM. Oct 28, 2021 · It’s a great kit for any AMD Ryzen system or Intel system using DDR4. By default if you run your RAM at speeds up to 3600 MHz the 1:1 memory to IF ratio will be used so your IF will be running at 1600 MHz if your memory is running at 3200 MHz (because the true frequency of DDR RAM is half of the the advertised speed (which should be measured in mega transfers not megahertz but not many people care about that these days Just a quick question. At a given frequency, the lowest latency is achieved by having all three values the same. Everything above 3600MHz RAM speed increases latency on ZEN 3 at the moment. C. But I can't get there. DDR4-3200 16-20-40-1. I'm using 2x8GB of Corsair Vengeance LPX DDR4 3600, with a Ryzen 5 5600G cpu, on an Asus Prime B550-PLUS motherboard. I set it down to 1600 and Example. To find highest fclk set all timings to auto, go into advanced, amd overclocking: set soc to 1. In BIOS I do not have an xmp profile option. Zen 3 architecture introduces a decoupling feature similar to Intel’s approach. Jan 23, 2022 · So 2200MHz seemed like a reasonable goal, that would allow me to go up to 4400 MT/s on the RAM. This is not 3600Mhz Frequency! We now add another one of those RAM modules and now have 2 RAM Modules; Both RAM Modules still run at 1800MHz, the frequency does not change Feb 16, 2023 · Hello, Last week I upgraded my RAM to Kingston Fury Renegade 16GB 3600Mhz CL16, and I turned on XMP profile, everything was working fine but yesterday I changed FCLK frequency to 3600MHz instead of 1800MHz by mistake. The ram being the limiting factor there I believe. This is because there is a latency hit when the FCLK and MemCLK are not divisible / proportional, as data has to be waiting for the next "tick" to transfer across the pipeline. 35V), as well as FCLK Frequency (1800MHz), and UCLK DIV1 MODE (UCLK==MEMCLK) Feb 8, 2023 · That RAM Module runs at 1800MHz Frequency (not at 3600mhz!) That RAM Module transfers 3600mt/s (two transfers per clock, 1800 * 2), hence the “3600” in its Product name. 1800MHz is the default FCLK on AM4 so the ideal 'clock' RAM is 3600MHz (1800 x 2). 3 5V" In BIOS under MEMORY FREQUENCY this reads "DDR4-3200MHz" FCLK FREQUENCY reads "1600MHz" and yet I'm still only getting 2400MHz For 3200 MT/s RAM, the memory controller will usually run at 1600MHz (UCLK = MEMCLK). So I don't have the best RAM, I guess. 4v at this ram frequency). These will be located in different places depending on your motherboard, but they’re often found under “Advanced Settings,” “FrequencySettings,” or something similar. Jan 10, 2021 · Currently, I'm running a ASRock Taichi, 5950x and TridentZ 32GB (4x8) CAS-19 3600Mhz How do I maximize the performance in relation to my CPU and RAM? From what I understand, the FCLK and frequency of RAM should match to maximize the performance. But beware, it is the most likely to not be stable. Find out the best RAM frequency, UCLK and MCLK ratios, and the pros and cons of overclocking FCLK. 4v. My RAM kit is the trident z g. If the RAM is at 3200 MT/s then FCLK should be at 1600MHz. Jun 20, 2021 · Learn what FCLK frequency is, how it affects RAM speed and performance, and what should your FCLK frequency be for optimal results. After selecting a frequency then save these settings in the BIOS and reboot. This should be run after any frequency/FCLK change. I have read in many reddit posts that users were not able to get a stable system with 1900/2000 FCLK and 3800mhz/4000mhz ram speed. E. FCLK is 1800, BCLK 100, DDR 3600 settings. (Not related to the 5800X3D, more related to my motherboard. Jul 5, 2023 · I've got a pretty high overclock on mid-tier RAM: 4200mhz, with mostly same timings as 3600mhz, at same volts (1. You want to match the FCLK frequency to the actual frequency of your RAM, in this case 1800mhz. Advertised timings are 3600 16-19-19-39-1T, which is where I have it set. I noticed when the FCLK was set to auto in the BIOS, the speed reported in HWInfo was 1600 and the UCLK was 900. 6 GB/s. Dec 24, 2022 · This means that if you have a DDR4 RAM clocked at 3600 MHz then your FCLK frequency should be set to 1800 MHz for optimal performance. You can increase your FCLK frequency to get more performance out of your RAMs Oct 3, 2020 · G Skill 3600 F4-3600C16 32 GB RAM (xmp profile - no other changes) My understanding is that for Ryzen 3000, FLCK should match the MCLK. Jun 18, 2020 · AMD switches its onboard Unified Memory Controller frequency (UCLK) to 1/2 of the DRAM data rate whenever DDR4-3600 is exceeded, and further protects controllers on the I/O die from instability May 18, 2022 · For optimal performance, your FCLK frequency should be half of your RAM clock speed. Dentro de la parte de «OC Tweaker» encontraréis, en la sección de DRAM, Infinity Fabric Frequency and Dividers. Thank you! Ah so yeah AMD 5800x has a 1800mhz FCLK limit, or around that range. GPU: RTX 3080 Strix OC | RAM: 32GB Jul 12, 2021 · Stuck RAM in proper holes (A2 and B2), turned on DOCP 3600, frequency 3600 (second XMP on RAM) and it worked. Very high MCLK frequency can mitigate the latency penalty of running UCLK = MCLK / 2. Retailers have just marketed their RAM for how many transfers it can accomplish and DDR can do 2 transfers per clock cycle. Jan 27, 2020 · On MSI motherboards as tested, the FCLK frequency and UCLK ratio (“UCLK DIV1 MODE”) are found in the “DRAM Setting” portion of the OC menu. So I switched it back to 1800 and overclocked my ram to 3600mhz :D Reply reply It's also similar for me 3200MHz ram with auto FCLK 1800. For most Zen3 non-APU chips that is 1900 (3800 RAM). 33 = 3200 MT/s, tRC is 51, tRTP is 8, tFAW is 23 3200 ratio and 100 MHz BCLK Frequency -> RAM frequency is 100 MHz x 32. Looking back, Ryzen 3000's FCLK typically hits a wall at 1,800 MHz, which means you can run the memory at DDR4-3600 and remain in 1:1:1 mode. That means your sweet spot for RAM frequency would be between 3600-4000 MHz. Nov 4, 2022 · That my two sticks of ram are indeed running at a total of 2400MHz. Adjust the FCLK frequency. 而当内存频率超过FCLK承载上限时，则按照2:1分频. At DDR4-3600 this memory maintains the 1:1 FCLK Frequency with AMD Ryzen systems so the Infinity Fabric is not bottlenecked. People suggest 3000/2000/3000 is the dream settings for DDR5 6000, and it is. Also, he notices a weird result where FCLK at 1800 performs worse than FCLK at 1600 with 3200Mhz memory. I thought it was a bit better than this when I bought it, but it is Hynix C-die CJR. g. Which reads "D. Sep 5, 2019 · With memory speeds greater than 3600MHz (mclock > 1800MHz), fclock caps at 1800MHz and uclock switches to a 1:2 ratio with mclock. Jun 11, 2023 · Find the FCLK settings. FCLK is the clock of the Infinity Fabric inside your CPU. Feb 13, 2020 · So you can run 3600mhz for sure on previous gen mobos, but much higher chance of it not working and you having to downclock to 3466mhz. Trident Z Neo - DDR4-3600MHz CL14-15-15-35 1 Its the very first time for me that I need to adjust the infinity fabric to handle the memory, at 3200mhz everything its stable and works as expected, but once I increase the frequency to 3600mhz and adjust the FCLK to 1800mhz the system becomes unstable. Messing around in my bios I decided to change my 3600mhz rated RAM frequency to 3666mhz and fclk to 1833, so far it's running fine but would i be better off just enabling xmp instead, or better yet taking the frequency and fclk as high as possible as opposed to enabling xmp? It's also a common misconception to blame the board topology for poor DRAM frequency with 4 DIMM's, as the majority of cases will have the CPU FCLK or a poor IMC limiting max MCLK frequency before the board topology does. started using a latency calculator a few hours ago and I'd get better latency with lower RAM clock speed with tighter timings. The only reason to go higher is to run a really high FCLK to offset higher latency when the MCLK:FCLK ratio isn't 1:1. com Bought 3600MHz Trident-Z last generation, it OC's to 3733MHz without a hitch. I have ONE profile selection under D. Apr 19, 2022 · Expected ram speed/fclk Most Zen 3 can do infinity fabric/fclk of 1900, effective ram speed 3800. skill 2x8gb 3600mhz 17-18-18-38 (Samsung B-Die), and I've managed to tighten my clocks a small amount to 15-17-17-34. 05v, ccd to 1. There have been rare exceptions where some really extraordinary Ryzen 3000 samples could run stably with a 1,900 MHz FCLK (DDR4 2000 MHz FCLK and 4000 MHz RAM is as high as you should ever go with Zen3. So i actually had tp lower RAM frequency from 3800MHz on ZEN 2 to 3600MHz on ZEN 3. . 25x (1. I could most likely bump the RAM frequency a big higher on CL22, but since the FCLK won't go any higher, I'd lose the 1:1 ratio. I've got the same board and it has run for months at 1:1 with a 3700x at 3600mhz. Looking back, Ryzen 3000's FCLK typically hits a wall at 1,800 MHz, which means you can run the memory at DDR4-3600 See full list on techtapto. Ahí podréis cambiar el FCLK. 00 TL;DW:Going for high frequency is a waste of timeA difference between FLCK and UCLK adds like 8ns of latencyFCLK on most chips should max around 1900MHz so o Nov 1, 2014 · DDR4-3200 is still the officially supported memory frequency on Ryzen 5000. Cause it is the lowest quality binned Ryzen 3rd gen CPU. FCLK in Zen 3 Architecture. This is not a good setting for performance but is for testing only. Does the FCLK being higher than 1500 (3000/2) cause any problems? Jan 9, 2020 · The Ryzen 5 3600 has a higher chance of running 3600mhz for sure. Oct 27, 2022 · When pushing FCLK around 1800 MHz, intermittent RAM training errors may be alleviated or eliminated by increasing VDDG CCD. Apr 12, 2021 · Unless your board is defective in some way I don't think that it would hold you back from 3600mhz 1:1. 15v, iod to 1. May 29, 2022 · the 5800x3d is 200dollars more than a 5700 for a 15% gain (gaming only), if you wanna stick with 16gb ram that's fine (though for most new builds i recommend 32) but the diff between cl18 and cl16 3600 will be about 3% for the 15dollars diff, you can't carry the cpu forward either, and getting dual ranked ram is another 10-15% difference, since you care enough to pay for a 5800x3d to begin with Dec 13, 2023 · Eventually, discovering the optimum FCLK⁤ frequency for your system ⁣can result in a⁢ visible enhancement in‍ efficiency. Easy way to do this, set DOCP, the nmanually set FCLK to 1600 which you know works. I have a 5600x in a Asus B550 that runs at 3800mhz 1:1. Oct 30, 2023 · FCLK is the Infinity fabric, that seems to need to be within a certain multiplier range of the MCLK - any value dividable by 0. Checked FCLK and it was 1800 so everything run fine although at Cl 18. Some select few can do 1933 (3866 RAM) or more, but this is VERY rare with actual stability. So there is not point imo to buy ram above 3600mhz . Like most other elements of your computer, the RAM can often be overclocked as well. P. For the most part DRAM latency and FCLK frequency doesn't matter as much with the X3D, but it still can help in 1% and 0. Jan 7, 2022 · Couple things: First, I wouldn't get 40000MHz DIMMs, especially with Ryzen. For AMD, run Prime95 Large FFTs and OCCT VRAM with max utilization simultaneously to stress the FCLK and ensure FCLK stability. With AMD Ryzen you want to set the FCLK half of your memory speed, so when using, for example, 3600mhz then set the FCLK to 1800mhz. Jul 26, 2021 · DDR4-3200 is still the officially supported memory frequency on Ryzen 5000. Would the best way be to just turn on XMP and set the FCLK to half of what the RAM frequency is? Jun 10, 2021 · Running FCLK as high as possible with lower memory clocks does boost performance indeed, however you are better at 1:1 ideally at 1:1 you get the best Latency AND the best performance for example i have 3600mhz ddr4 DIMMS, i have overclocked these to 3800Mhz and set the FCLK and MCLK to 1900mhz - about the highest you can expect on ryzen 3000 Aug 19, 2021 · FCLK ideally runs at half the memory speed and in sync, as a general rule. That seemed wrong, so I went into the bios to manually change the FCLK to 1800 and it would not post. 1% lows if the working set is overflowing from L3 to DRAM. It operates at a 1:1 ratio with the memory clock, ensuring optimal performance. So i had to set my RAM to 3600MHz to get 1:1 ratio FCLK-UCLK. ¡No lo confundáis nunca con el FCH BCLK que aparece justo arriba! ASRock. However, I will add, most 3600's can use 3600MHz RAM. And 3600MHz CL16 isn't even that great of a performance bump over 3200MHz CL16, so gambling that 3600mhz will work on B450/X470 for a 3rd gen CPU in my opinion is just a waste of time. So memory running DDR@3200 will have FCLK of @1600. For example I you are running 3600mhz ram set your fclk to 1800mhz. 35v to 1. Nov 13, 2020 · If we take the same 3800 spec and just increase the frequency to DDR4-4000, which right now in the absence of 2000 MHz FCLK support decouples from a 1:1 ratio with the Infinity Fabric, we actually I understand the benefit of synchronous memory and FCLK/Infinity Fabric. And you're absolutely right in the end a lower frequency with tighter timings has less latency. So I loosened the timings a bit and I can do 4333 stable at CL20, but 4400 just isn't stable unless I drop to CL22. I used to have 3600mhz ram (2x32gb) for which i'd set the FCLK to 1800mhz for a 1:1 ratio. 95v, ProcODT to 34 on SR (single rank) and 40 on DR (dual rank), try to boot 1900fclk. Also, it is worth noting that FCLK, UCLK, and MEMCLK are synchronized together which means that they will also be synced to 1800 MHz as well. I heard some motherboards on "Auto" set 1. qtralm cegb ghva dnnz rggzej gqvjes yxhhz ihtwnzq pggy kgkm