Ryzen 3000 series when adjusting frequency stay in the 0.95 ~ 1.15v range, Ryzen 5000 series SoC is very sensitive it is better left on Auto as changing the SoC value mostly has a negative impact on stability. © The ideal ratio between the frequency on both FCLK and MCLK in Ryzen is 1:1 to get enhanced performance. Future US, Inc. 11 West 42nd Street, 15th Floor, No, and also yes; the answer totally depends on the users, as overclocking has certain costs. You will receive a verification email shortly. . The basic theory behind the increased speed of the RAM’s performance is the frequency of the data transfer rate. 2000MHz fclk is to Ryzen 5000 Series what 1900MHz fclk was to the Ryzen 3000 Series. Ryzen 3900XT Overclocking - FCLK, PBO Bug, & Memory Tuning vs 3900X NewbieTo Opportunity Blog #best cpi affiliate - Opportunity Sources Ryzen 3900XT Overclocking - FCLK, PBO Bug, & Memory Tuning vs 3900X On July 7th 2020 AMD releassed the Ryzen XT refresh CPUs consisting of the Ryzen 9 3900XT, Ryzen 7 3800XT, and the Ryzen 5 3600XT. Many samples can do it, but not all. I use 128Gb with a 5950X and Crosshair 8 hero wifi. We can conclude that there is no simple answer to whether you should enable or disable Geardown Mode. Testing 4000MHz RAM: games. Ryzen 5 3600 stock settings Asrock X570m Pro4 (bios ver 3.0) 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. The high-performance memory kits are more likely to do 1T at the advertised frequency and timings. This article covers the best RAM settings and combinations for Ryzen 5000 processors, including overclocked configurations, along with a few tips on what you should expect from your chip. In a slide published over at . Now in the Ryzen 5000 processors of Zen 3 architecture, the FCLK frequency can be overclocked to 2000MHz (however, this is dependable) corresponding to the operation of 4000 MHz in RAM, which is Double Data Rate or DDR.if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-yoodley_com-medrectangle-4-0')}; The Infinity Fabric was announced in April 2017 by Mark Papermaster, AMD’s SVP and CTO. We updated the firmware for our Gigabyte B550 Aorus Master to the latest publicly-available revision. As usual, the trio needs to be on the same page for optimal operation, while breaking that synchronicity results in a heavy latency penalty that's detrimental to performance in some applications. Ryzen 3000 series when adjusting frequency stay in the 0.95 ~ 1.15v range, Ryzen 5000 series SoC is very sensitive it is better left on Auto as changing the SoC value mostly has a negative impact on stability. The Infinity Fabric Clock (FCLK) continues to be in a permanent relationship with the unified memory controller clock (UCLK) and memory clock (MEMCLK) in a 1:1:1 ratio. Learn more. Much like the Ryzen 3000 series "Matisse," the Ryzen 5000 series "Vermeer" is a multi-chip module of up to 16 CPU cores spread across two 8-core CPU dies, and a unified I/O die that handles the processor's memory-, PCIe, and SoC interfaces. The ram being the limiting factor there I believe. Adjust ProcODT within the ohm range. Thus, if we install 3733 MHz RAM, its frequency will be 1866 MHz and the FCLK will become 933 MHz. A frequency of the IF od 1900Mhz runs in a 1:1 ratio with the RAM at 3800Mhz; Click 'Calculate Safe' and 'Calculate Fast' and export a screenshot for each calculation This new collection of the letters that Lewis Carroll wrote to the illustrators and prospective illustrators of his books affords fresh insights into Carroll's complex character, traces the history of the books that became great classics of ... Weird thing is, this new PC is lower power consumption and I'm using same power supply- no idea why that would be a problem. The FCLK and UCLK are automatically clocked at a 1:1 ratio when the frequency is upto 3733 MHz. RAM speed is a major factor in gaming performance, and the Ryzen 5 3400G can support up to DDR4-2666MHz memory . So, here are my RAM details: Old RAM: 2x AData XPG D41 8GB DDR4 3200MHz 16-18-18-36 (1 stick using Hynix Chips, while the other uses Samsung chips. Just keep . The new Ryzen 3000 chips officially support memory speeds up to 3200MHz and can reliably run kits up to 3600MHz, with extreme overclocks up to 5100MHz. So for the 1:1 ratio, FCLK has been set to half of the Memory frequency. These chips often don't overclock to bleeding-edge core frequencies, instead relying on automatic algorithms to extract the best core performance. 1800mhz FCLK. 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. It is true for all CPUs, as there are some CPUs that can’t reach 1900 FCLK, and there are fewer people who would want to raise the SoC voltage to see if it can reach 1900 MHz or not. What Does ‘Maximum Frequency’ in Resource Monitor Mean? Get exclusive content and advice, from Yoodley delivered to your inbox. In upcoming AGESAs, we will be implementing additional tuning that will make reaching 2000MHz easier. and How to Enable/Disable It? Patriot Viper 4 Performance Memory Kit is one of those DDR4 RAM kits designed to provide you the best experience in town. Unsurprisingly, DDR4-4000 is the ultimate goal if your processor and budget allow for it. It delivered 7.2% more performance than DDR4-2133. Overall, the option had little impact on performance, with the difference amounting to less than a 1% delta. Tried flashing the bios, did nothing. Most Zen 2 chips (desktop at least, so Ryzen) can handle 3600MHz. Can be left on Auto most of the time. Current system: AMD Ryzen 5600x with stock cooling (purchased used) MSI B550 Gaming Plus (purchased used) 32gb (2x16) Kingston Fury Beast 3600mhz CL18 (purchased new) 1.35v. We evaluated nine different memory frequencies in total, spanning from JEDEC's baseline of DDR4-2133 all the way up to DDR4-4000. I've got the same board and it has run for months at 1:1 with a 3700x at 3600mhz. Installed windows etc. Come join the discussion about computing, builds, collections, displays, models, styles, scales, specifications, reviews, accessories, classifieds, and more! On the software front, we used a fresh 64-bit installation of Windows 10 Professional with all available updates. . I don't think you have problems. Eventually got to Bios screen RAM was set to 3200mhz. A frequency of the IF od 1900Mhz runs in a 1:1 ratio with the RAM at 3800Mhz; Click 'Calculate Safe' and 'Calculate Fast' and export a screenshot for each calculation However, the really good samples can support a 2,000 MHz FCLK, which opens the door to leverage DDR4-4000 memory without any . DDR4-3200 is still the officially supported memory frequency on Ryzen 5000. I'd probably have to borrow a friend's PC and disassemble it but it's an old Intel system- I don't have an AM4 motherboard or DDR4 RAM I can try. Best Gaming RAM Kit for Ryzen: Crucial Ballistix 2X8GB 3600Mhz CL16 BL2K8G36C16U4B ($79.99) You don't have to spend much to obtain premium RAM that is optimized for Ryzen. So when you set you DRAM multi to X38 (DDR3800) the MEMCLK is 1900MHz. According to the leaked official slide, AMD is suggesting DDR4-4000 MHz system memory clock speed to be the sweet spot for all Ryzen 5000-series Zen 3 desktop processors, and DDR4-3800 MHz the . Ryzen 5000 wields AMD's latest Zen 3 cores that introduced important IPC gains, among other microarchitectural improvements. Get instant access to breaking news, in-depth reviews and helpful tips. Tom's Hardware is part of Future US Inc, an international media group and leading digital publisher. I wouldn't worry too much. The UCLK is the frequency at which the UMC or Unified Memory Controller operates. I set the memory to DOCP (in my case 4000 18-19-19-39), I then set the frequency to 3200mhz and the FCLK to 1600mhz, a SOC voltage of 1.1v and DRAM voltage of 1.45v. How can I test RAM and motherboard if I don't have parts?? It is recommended to use RAM at such a higher MHz speed that the Infinity Fabric can keep up. There have been rare exceptions where some really extraordinary Ryzen 3000 samples could run stably with a 1,900 MHz FCLK (DDR4-3800). I tried almost everything, updated the bios 7C35v1D2(Beta version), removed and installed the cpu and rams, renew the thermal paste, changed the ram sticks, at the beginning i had 4*16 ram but later tried 2*16 but nothing changed. To provide seamless, power-packed and ultimate performance, modern processors are made of interconnected subsystems like cache, CPU or the memory controller to enhance performance. Naturally, lower frequency memory in . Albeit mine is a 3600X, 1800 IF is the limit when AMD advertises to run 3733Mhz RAM for the "sweet spot", which is 1866Mhz IF. Only a select few chips managed to hit 1900MHz on the FCLK, to make running 3800MHz(MT/s) viable on the memory. There is more performance to be had, but whether it's worth it is hardly something I would decide for others. However, Ryzen 5000's FCLK is a lot more forgiving, paving the way for a 2,000 MHz FCLK (DDR4-4000). Ever since they went to the format of "best of" links trying to sell you crap the content here has gone to hell. Yes, it can easily reach a frequency of 2000MHz FCLK, but some other CPUs like Ryzen 5 5600X cannot reach 2000MHz, but it can hit only 1900-1800 MHz FCLK. +0.7% vs +1.3%, ie, approx 2x additional gain. During the entirety of our tests, we kept the Ryzen 9 5900X's FCLK in sync with the memory frequency that we tested. Testing motherboard and PSU can only be done by elimination...by swapping in known-good components to eliminate them. You have entered an incorrect email address! If your memory kit has an odd CAS Latency (CL) value, Geardown Mode basically rounds it up to the nearest even number and sets the command rate (CR) to 1T. For a better experience, please enable JavaScript in your browser before proceeding. In fact you may not have any luck at all, which would mimic our own . According to Robert Hallock, the maximum RAM speed that can work in the Ryzen 5000 with the FCLK in 1: 1 ratio is DDR4 at 4,000 MHz.A 2,000 MHz FCLK is for the Ryzen 5000 the same as a 1,900 MHz FCLK on the Ryzen 3000 Series; AMD has not changed the memory controller of its processors (compared to the Ryzen 3000), but it has raised the speed . On average, dual-rank memory offered up to 7% more performance than single-rank memory in our application tests. Yet across the globe, people are talking about 3600MHz beeing the sweet-spot with the ZEN3-GEN and OC to 3800MHz // From what i understand beyond 3800MHz the FCLK goes from 1:1 to 1:2, so not going there would be ideal // So whats the Deal here? 3600MHz ram with C16 latency is currently the best value memory kit you can get for your Ryzen 5000 series builds. We can now set about answering the questions we posed at the outset: Zen 3 does allow us significantly higher Infinity Fabric clocks, and with it higher viable memory overclocks. I noticed when the FCLK was set to auto in the BIOS, the speed reported in HWInfo was 1600 and the UCLK was 900. 3733 and 3800 require some luck. Adjust ProcODT within the ohm range. Ryzen 5000 follows the same guidelines in regards to the FCLK and MCLK. G.Skill is updating its popular Trident Z Neo memory to 4,000MHz (effective) speeds, which places it right in the so-called 'sweet spot' for AMD Ryzen 5000 processors. This actually made RAM with low memory provide better performance. DDR4-4000 is to Ryzen 5000 Series as DDR4-3800 was to AMD Ryzen 3000 Series - good luck! It is important to know that although FCLK is free to run at any speed, it doesn’t mean that you will use the max frequency because it can cause de-syncing and reduce overall performance. The last sentence from the slide reads: "DDR4-4000 is to Ryzen 5000 Series as DDR4-3800 was to AMD Ryzen 3000 Series - good luck!". Keeping the frequency at a 1:1 ratio maintains the life of the processor. Should I go to the latest (June) or inch forward on the BIOS updates until it's stable: November --> January --> May --> June? That's an important consideration when selecting and tuning Ryzen's memory. The mobo accepts up to 4400MHz so I know that I'm good on that aspect. 3600Mhz / 2 for Double Data Rate RAM) When the Infinity Fabric was introduced in AMD’s Zen 2 architecture processors, the FCLK was decoupled from the memory and is now controlled independently from the BIOS system by adjusting its speed. Going beyond that limit can result in worse performance, unless you are an enthusiast memory overclocker and know what you are doing. CPU: Ryzen 5950X @ stock CPU cooler: Kraken X73 @ top exhaust, Thermal Grizzly Kryonaut Extreme paste GPU: RTX 3090 TUF OC @ MSI Afterburner auto OC custom curve, 1920MHz core max, +200MHz memory, +7% power limit, V3 BIOS RAM: 2x16GB 3733MHz CL14-15-13-29 @ 1,44V (G.SKILL F4-4000C14D-32GTZN) Mobo: X570 Aorus Master v1.2 @ F34 BIOS 1,221. This is not a guarantee. Save my name, email, and website in this browser for the next time I comment. You can OC the RAM to 3800Mhz (FCLK 1900) for even better performance. The cumulative results showed a negligible difference between the two setups. Although it is not a good practice to change the FCLK and set it at high frequency, there are a lot of AMD fans that increase the FCLK frequency to get the best performance. you will need 5000+ DRAM kit in order to be able to work UCLK high enough to compensate for the 2:1 ratio. We decipher the best memory frequency and configuration to unleash your Zen 3 processor's full potential. I think I stick to what Hardware Unboxed memory tests shown already. What Is the Best RAM Frequency For Ryzen 5000? The performance gap between DDR4-2133 and DDR4-4000 stretched as high as 7.7%. I've noticed that Increasing the DRAM frequency to 3600MHz increase this to like 25CL or something. You are free to unsubscribe or contact us at anytime. Our test results confirmed that DDR4-3600 is still the sweet spot for this generation, though. Ryzen 3000, FCLK Issue. Ryzen 5000 follows the same guidelines in regards to the FCLK and MCLK. Can be left on Auto most of the time. Or just finding stability? AMD has confirmed that hitting 2,000MHz on the Infinity Fabric clock of Ryzen 5000 CPUs may not be as easy as first hoped. For the record, the statement is inaccurate since AMD suggested . 3800 wasn't exactly the "sweet spot" for Zen 2, but rather 3600. For Ryzen 1000 and 2000, your . We stated earlier that the memory speed sweet spot for the Ryzen 3000 & X570 platform was between 3200 and 3600MHz, so we're going to go with the latter and set our system our memory to 3600MHz. What Is SVM Mode? Don't forget you also have a lot of overclocking headroom here. DOCP Only = only Mem OC; DOCP + IF OC = Mem OC + FCLK OC. "DDR-4000 is to Ryzen 5000 Series as DDR4-3800 was to AMD Ryzen 3000 Series," AMD wrote. By default FCLK, UCLK and MEMCLK are still synced together on 3rd generation Ryzen for speeds up to and including DDR4-3600 (1800 MHz FCLK/UCLK/MEMCLK), and as a result users with DDR4-3600 kits . With a bit of luck, you' . Based on my knowledge , Ryzen 5600 series and 5600x can support 4,000 MHz of Ram. SSD (purchased new), Windows 10 Pro x64 (my first time on W10), Updated chipset from AMD's website (this was newer than MSI's site). Don't expect every memory kit to run at 1T, either. If you'll remember, the previous generation was optimized for DDR-3200, but red team has clearly taken memory specifications to another level with Zen 3. With Ryzen 3000 and 5000 series above 3600Mhz to 4000Mhz (depending on the silicon lottery) you will lose the 1:1 fclk to uclk ratio that results in the best bandwidth and latency. In fact, often just selecting the right kit with the correct number of DIMMs can provide tangible performance gains with a minimum of fuss. I've been having issues with my computer freezing, locking up, then rebooting. This gives identical true latency - ((CL divided by MHz) by 2000)) between the two - but the 3600 MHz would still be expected to peform better overall due to the higher bandwidth and the higher FCLK that the faster RAM requires - (Ryzen FCLK must be 1:1 with the base Memory Clock - i.e. AMD's Ryzen 5000 Series lineup . This actually made RAM with low memory provide better performance. To explore the different variables in play, we tested a third configuration with the memory kit running at the default timings, but at 1T. But the main thing . But altering clock frequency can affect the product warranty, stability, security, performance and life of the processor. Geardown Mode came back with mixed results in our testing. DDR4-4000. AMD Recommends DDR4-4000 Memory for Ryzen 5000 Series Processors. 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. 1 @ 512 buffer (RME drivers), couldnt work on it anymore. Are you interested in overclocking? Thanks to the Turkish resource Technopat, it became known that AMD recommends using DDR4 memory with a higher operating frequency with the new Ryzen 5000 processors based on the Zen 3 architecture than with the previous series of chips. Can be left on Auto most of the time. DDR4-3200 should unquestionably be the starting point for Ryzen 5000. Unless you have spare budget which cannot be used for anything else, then you spend it on upgrading your RAM. If the frequency is out of sync, like 4000 MHz FCLK and 3733 MHz UCLK or vice versa, then the ratio becomes 2:1, which introduces a latency penalty and performance loss. New York, Jumper's channel: https://www.youtube.com/channel/UC-_SHroFtyxaeZUmUrQOcmgMy Patreon: https://www.patreon.com/buildzoidTeespring: https://teespring.com/store. The is 2666mhz ram good for ryzen 5 3400g is a question that has been asked before. For example, in the Microsoft Office benchmark, disabling Geardown Mode boosted performance by up to 2.7%. On an AM4 motherboard with four DDR4 memory slots, you can opt for a memory kit that's comprised of two dual-rank or four single-rank memory modules. . Ryzen CPUs are known for providing the best performance with RAM running synchronously with the Infinity Fabric Clock and the Memory Controller or the UCLK. We saw similar improvement in performance in y-cruncher and 7-Zip's compression benchmark where the 2x16GB memory kit outperformed the 2x8GB memory kit by 15.6% and 25.2%, respectively. Set FCLK in sync, 1:1 Ratio. It doesn't officially support 5000 series processors yet, but you might get lucky. Now in the Ryzen 5000 processors of Zen 3 architecture, the FCLK frequency can be overclocked to 2000MHz (however, this is dependable) corresponding to the operation of 4000 MHz in RAM, which is Double Data Rate or DDR. The first setting you'll want to change under the "Tweaker" tab is the "System Memory Multiplier." This AMD also Recommends for RAM to run on 1,35V. What is the GFX clock frequency? AMD doesn't guarantee that every single Ryzen 5000 processor will achieve the feat, but the majority will. With the upcoming release of the new AMD 5000 processors set for November 5th, it's not exactly a secret that in past releases, Ryzen . I have a 5950x a asus crossfire dark hero and a gskill 4000 cl16 kit. The Infinity Fabric interconnects the core components of the system (CPU, RAM, etc. Ryzen 3000 series when adjusting frequency stay in the 0.95 ~ 1.15v range, Ryzen 5000 series SoC is very sensitive it is better left on Auto as changing the SoC value mostly has a negative impact on stability. I just purchased 2x8GB sticks at 3600MHz. FCLK ideally runs at half the memory speed and in sync, as a general rule. What RAM speed is the best for the AMD Ryzen 5000? Increase SoC voltage. Several PC component manufacturers manufacture RAM. Corsair's Vengeance LPX DDR4-5000 kit offers one of the highest frequencies commercially available, though kits such as G.SKILL's Trident Z . So in the single rank vs dual rank analysis we learn that... 32+GB is almost always better than 16GB? Thus, if we install 3733 MHz RAM, its frequency will be 1866 MHz and the FCLK will become 933 MHz. First, the base frequency of the RAM module is 2133MHz. What should your FCLK Frequency be? In upcoming AGESAs, we will be implementing additional tuning that will make reaching 2000MHz easier. And memory speed isn't strictly a function of frequency. Rocket Lake brings increased native memory speeds (DDR4-3200 up from DDR4-2933), higher IPC (early samples indicate a 19% IPC gain) and 50% stronger integrated graphics using Intel's new Xe architecture. According to Robert Hallock, the maximum RAM speed that can work in the Ryzen 5000 with the FCLK in 1: 1 ratio is DDR4 at 4,000 MHz.Fclk Ryzen The motherboard BIOS default has default 'FCLK a 1:1 Ratio' meaning that Infinity Fabric attempts to run at the same speed as your system memory. There are also several 500 series chipset improvements including: 20 PCIe4 CPU lanes and USB 3.2 Gen 2x2. Our tests included four different memory configurations, with 16GB (2x8GB), 32GB (4x8GB), 32GB (2x16GB), and 64GB (4x16GB) setups to assess the impact of memory ranks and capacity on AMD's Ryzen 5000 processors. To provide seamless, power-packed and ultimate performance, modern processors are made of interconnected subsystems like cache, CPU or the memory controller to enhance performance. Best RAM For Ryzen 5 5600X, Ryzen 7 5800X, Ryzen 9 5900X & Ryzen 9 5950X. SDF has multiple connecting points which join the PCIe PHYs, memory controller, USB hub and other computation and execution units, and it is the primary means of data flow around the system and the endpoints of the connection. This RAM kit is just $80 and brings all the benefits of fast ram ensuring maximum gaming performance from your CPU. Hello there, First, sorry for my english, i'm french. Ashes of the Singularity, Far Cry 5 and Crysis 3. For a DDR4 3600 RAM, the best settings are 1800MHz memory and 1800 MHz FCLK. To ensure consistency among the tests, we ran our RAM benchmarks three times and used the median value as the final result. and set the frequency. Its not a RAM kit as I bought them individually in different time frame) New RAM: 2x Corsair . There is no "safe bet" that your CPU will reach this frequency. Perhaps, sadly 1800 IF is the legitimate ceiling for the entire Ryzen series. It was suggested that Ryzen and 3600mhz may not be stable at stock settings. And a 1:1 ratio between the highest FCLK and the highest memory frequency is the best possible configuration that you can use. Four years later, AMD's foot is still on the pedal and taking the fight to Intel, with its latest army of Ryzen 5000 (codename Vermeer) processors leading the charge. When you buy through links on our site, we may earn an affiliate commission. Went back to bios changed DRAM speed to 3600mhz in Profile 1. As always, memory frequency only impacts specific titles where the processor does all the heavy lifting and the game engine responds well to improved memory performance. set the frequency in the left column to your max stable FCLK/IF frequency * 2. 3600Mhz / 2 for Double Data Rate RAM) As with most Ryzen 5000 processors, the FCLK ceiling for our sample was 2,000 MHz (DDR4-4000). Furthermore, we updated our test system's drivers, benchmarking programs, and game clients to the latest versions at the time of testing. AMD itself recommended the users of DDR4-3600 to use FCLK at 1800 MHz for optimal performance. There was a problem. So memory running DDR@3200 will have FCLK of @1600. Increase SoC voltage. This remains true with RAM speeds up to 3600MHz, where the infinity clock reaches 1800MHz; beyond this, the two clock speeds are decoupled as the infinity fabric may not be able to keep up . In gaming, however, it made almost zero difference. Just want default stable. In the next few images, we look at the improvement in performance across a few applications between DOCP only and DOCP + IF OC. We would be looking at DDR4 RAM, which has a minimum memory speed of 2600MHz. It's not always easy to stay on the right path, and AMD, like any other company, has had its ups and downs. Let's see how that impacts performance. I was under the impression it was sussed out already, RAM speed matters more with a Ryzen CPU than it's direct market competition, and 3200 MT/s is nearing that point of diminished returns. We recorded a 5.8% performance difference between DDR4-2133 and DDR4-3200, the native frequency supported on Zen 3. Are there any other clocks present in AMD Ryzen processors apart from FCLK? Although it is not a good practice to change the FCLK and set it at high frequency, there are a lot of AMD fans that increase the FCLK frequency to get the . How to Bypass the Administrator on Chromebook? Vcore [AUTO]: range of 0.234 - 1.422. You can have really high frequency but awful timings. It is the Link Clock at which the I/O Hub controller communicates with the chip. The Infinity Fabric is a communication bus, and it is controlled by the Infinity Fabric Clock or FCLK, a clock speed that dictates its operational performance. It's extremely hard to find a Ryzen 5000 series that can run at 1900 or 2000 IF, even with the latest BIOS patches. Thank you for signing up to Tom's Hardware. Set FCLK also at 1900MHz and . Hello, I'm new to overclocking and I'm not shure about the max "safe" voltages on an amd 5000 platform. It's a little tricky to try different parts. Sets the clock rate of the internal Vega GPU on Ryzen APUs by a factor of 1:1, so a 1600 value translates into a 1600mhz GPU clock speed. Yes, you can gain more, but the cost benefit analysis doesn't pencil well so one makes a personal judgement call whether to invest further. Should It Be Enabled? AMD Ryzen 5 5600x PBO | ASUS ROG STRIX B550-F Gaming Wi-Fi | G.SKILL Ripjaws V 32GB DDR4-3733 16-19-21-36 1T. set the frequency in the left column to your max stable FCLK/IF frequency * 2. The Infinity Fabric is a communication bus, and it is controlled by the Infinity Fabric Clock or FCLK, a clock speed that dictates its operational performance.