AMD Ryzen 3900X I use reaches a boost frequency of 4,500 MHz and usually operates around 4.20 - 4.25 GHz on all [or most] cores. Mine is nowhere close to that. So the take away is manual fixed ratio overclocking really is a pointless endeavor on the 3900X. is that realy a big ask? ). It doesnt explain them at all. The best I could do was 4.35 GHz on the good chiplet and 4.25 GHz on the bad chiplet. 1.35 range ideal. When I get home from work ill try and post some tips and just some general rules I followed when trying to push my chip. Dropping the voltage down hurts overall peak performance. But I have tried to use Ryzen master, and its idea of stable is a joke. It appears my chip hits some kind of power usage threshold and shits the bed. It maybe just one limiting core or CCD. Still seems crappy compared to the other chips mentioned in this thread. So I had a look in bios again. Low 50s on idle. 1.4 max. At max load leading up to that point I never breached 75c temperatures. By supplying the processor with less voltage we’re reducing the amount of heat generated in use. So where can i find the values on the right i circled? I tried some overclocking with Ryzen Master. i was able to run CBr20 and score 9533 at 4.1 all cores, 1.375v. Personally, I have my chip set to -1.0V so the 3900x never has more than 1.4V fed to it (I did the same on the 3700x; l actually had this CPU with a 1.250V undervolt and it did just as good as stock. Again, im not shooting for the stars but id also like things to be correct. PCB revision? The onboard firmware in the CPU controls that, not the power plan. There, Broke 8k lol. Maybe I'll make it 16-16-16-32. Messing around yesterday, either my chip is a complete dog or I'm really screwing things up. I watched this one the day I ordered the board. You're supposed to watch temps under heavy load, not while idling. Then they run hot. However, with the sh!tlet at 4.3, and the chiplet from 4.35 up to 4.425, I get the same score 7655. I am going to do some SMT testing and core preference testing tonight, ill let you know how that turns out too. I couldn't complete a CB20 run at 4.3 all core at even 1.3875v. With 4650 MHz as the maximum (and always very short) value reached, the Ryzen 9 3900X is still just below the 4.7 GHz mark, but still surprisingly high. What am I doing wrong? Which got me looking at voltages and the BIOS had the CPU at 1.45ish for god knows what reason. Increasing GFX voltage to 1.3V did nothing, and did not change the voltage readings at all. Wait, I don't get it. Im just curious, I also noticed my board was over volting the piss out of my CLDO VDDG, MEM VTT, VDDCR SOC and CLDO VDDP, I had to manually set them into spec and as soon as I did more headroom opened up. Heres a screen shot. I would say too high. Based on the new voltage info which I cannot actively keep cool enough to use I have stabilized at 4.525 all core OC on 1.36v - Anything over 1.40v starts to strain my loop and I hit 80c on the CPU. Asus board will idle in 1.4v mostly, yes it does dip to sub 1v but lot less than asrock board. Here is what I observed with a really good case airflow and Noctua D15 on my 3950X and 3900X alike. I changed RAM timings to 16-16-16-32 and still got horrible performance. Chip still wouldnt get stable over 4.6 with 1.4+ volts. for example, there are 2 VDDGs in the bios, and neither of them are labelled CLDO. Looks like you got GoldChain shitlet and he got your good chiplet. We're just discussing the 3900X for the sake of simplicity, here. I also tried the DRAM calculator tool, but that lead me nowhere as pretty much everything is was asking me to input, i didnt know. it doesnt explain any of this... i looked. A new BIOS is not going to fix voltage requirements and heat. Keep an eye on the temps. Reply TJ Hooker 19 June 2020 19:00 Kidding aside, try OCing individual cores in Ryzen Master to see which one is limiting you plus figure out which CCD you can OC more. Ryzen 3xxx CPUs tend to run at veery high voltage even on idle. I think the memory controller on mine is weak. You should really undervolt it. You are using an out of date browser. You should get the beta bios and dig into the per CCX overclocking. When I went into bios I didn't find anything that matched. i dont understand why someone wont just say this setting is that setting, that setting is this setting. So I have no idea what its doing to determine that. Looks like you win the silicon lottery this time. the bios apply wrong voltages to numerous things, it was asus he mentioned also. I have trying really hard to get stable at 4.6ghz even on just on set of cores and its not happening even at crazy voltages. But this only works if all other cores clock in the direction of 3.6 GHz. and then all the ns #s.... where do i get that info? Like way too high. I’d keep it in the 1.3x v range. I bet you have even more performance left on the table. jayztwocents mentioned this. I tried making the same adjustments in bios that i did in RM, plus a few addtional tweaks to the only other settings i could find. All core, a 3900x will struggle to reach 4.2ghz. Can confirm SMT totally not worth dickin with. Similar, but not a match so I didn't want to dick around with what I wasn't sure of. ASRock X370 Taichi. I wrote down all the other #s i could see in the screenshots above, and went looking for them in bios, and i cant find them. Ignore what RM says are the preferred cores. I dont know why this would be... but its either that or im blind. I am talking identical setup other than the CPU 3600 vs 3900x in the Asus setup. That is one sick chip btw. 0 Kudos You are close to that 8K geeze! The Ryzen 9 3900XT managed an all-core overclock frequency of 4.3GHz at just 1,325V, which is reasonable but not outside the realms of something I've achieved with my 3900X … I haven't tried to go so 'low' on voltage on the 3900x yet. The yellow curve shows the beat of the fastest nucleus in the comparison. Someone else mentioned that 16-15-15-32 is an odd timing. Hey all, long time lurker, rare poster here. I dialed things back to 1.35, and clocked the chiplets separately. Looks like you're running stock power limits?? Ryzen 9; 3900x heat, voltage and frequency issues. I bump up one more multi setting. AMD’s high-performance x86 Core “Zen 2” architecture enables 3rd Gen Ryzen Processors like the AMD Ryzen 9 3900X to deliver the highest single-thread and multi-thread performances for mainstream desktop processors. On asrock idle voltages are miles better than asus in windows. Memory rank? **********/d0J9RQNk/4-3-OC-2.png, Ryzen 5 3600X All Core 4300Mhz Ryzen Master-Voltage are normal as you would expect, Ryzen 5 3600X All Core 4300Mhz Motherboard BIOS-Voltage are off when set through BIOS, https://www.reddit.com/r/Amd/comments/cbls9g/the_final_word_on_idle_voltages_for_3rd_gen_ryzen/, https://forums.guru3d.com/threads/finally-fixed-my-ryzen-temps-voltage.430402/, (You must log in or sign up to reply here. One Chiplet I can OC to around 4.3x and the other 4.5x. Quick look to Google suggests 1.325 has been reported by AMD as a "Safe" but I cannot find this on any AMD articles or really any kind of review / overclock review. The starred/preferred ccx were my weakest, smh. 8028 on the Cina - not to bad, Ran AVX2 Beta in CPUz as a stress, seems good for about an hour. That means you most definitely have at least one CCX that can go higher in multi. If your CPU is OC, it may also be good to reset it to factory settings. I found it to be completely wrong. It's B Die spec'd at 4000 19-19-19-39 at 1.35v. I might try some chilled loop OC'ing a later this year. It's a lot easier using 1004 bios and doing it in bios. I shouldn't need the voltage I'm using for the RAM. Why don’t you read through this forum thread and see if it can answer your question? Gen. CPU, I advise to go the 'voltage offset' route. It may not display this or other websites correctly. Hey all, i had to join this forum just so i could take part in this discussion, and hopefully get some help from you guys as you certainly know more about this than me! Not shown, i also disabled PBO. The two PBO test sets are used to provide a reasonable high-power comparison point, to gauge the "dangerousness" of voltage under-reporting at stock. unfortunately the manual is useless. I am not sure that I am doing it right... but its working ok so far. So, I went back in and removed the -.1 offset from core voltage. I think there is something to be explored with the way that the BIOS is telling the OS what the fastest core is, and the preferred power preferences which the setting name escapes me right now. a 12 core 3900x pushes many more amps through the CPU than a 6 core 3600 would, assuming the same silicon quality. ... Stock voltage was around 1.35 all core for me which caused the chip to slow down as temps reached 85c. I played around with RM a bit. thanks for the reply pendragon. They struggle with giving people work units, and if you split your CPU into multiple smaller workers, you will experience very high temperatures, too high to run 24/7. Now, I can get the sh!tlet to 4.3 and the chiplet to 4.425 and pass Cinebench. i will load up 1 of the above screenshots on my phone and look in the bios, but it seems most of what im seeing above is ram timings? so how am i to know which to change? I guess I though Ryzen Master was taking care of this, but I guess not, because I got further. Oh are you running the beta agesa? I jotted down some numbers from a thread on techpowerup and a video by jayztwocents (YouTube). Thought I was in the all clear as it didn't power off immediately like it usually does if I push the clocks too high on lower voltages, but then the familiar happens and it powers down. Setting the Bar for High Performance. Anyone using a 3900x with a corsair h110i gt? Never out of the 60s. Check your voltage if you run high temps on idle!!! (note: Apologies: I see that the same message was posted twice (revised in this post), but I'm unable to delete or even edit the original post for some reason) I first reported my issue in Aug 16, 2019. Check the CPU core voltage and the RPM of the pump. You try just setting the multi / voltage in the bios? What board are you running, ram and settings? The heat and voltage required is too high. As it stands yer minimum achievable core multi is 44.25. Under heavy load the 3900X can run at 1.1v with vdrop which is a great CPU. Pushed the voltage up incrementally to 1.35 to see if I could push 4.5GHz on all cores. EDIT 7/10/19 @ 15:48 UTC: these comments are true of any 3rd Gen Ryzen. Ryzen 3900X with a Corsair H100i rad and MX-4 in between. Played a few hours of CoD too. https://i. ... which should be enough to ensure that the system won’t crash and that temperatures won’t get too high. I then ran Prime 95 at those settings and the computer rebooted after about 5 minutes. I just got an interesting email back from AMD. Also, temps are completely fine at all of these settings. I am running the latest ABBA bios for the MEG Ace. PBO doesn't do anything on an all core overclock afaik but it does make it easier to raise the limiters. Im sure that NOT changing any of the other settings is hurting me. Thats all i changed, and that voltage seems wayyyy to high compared to what im seeing above. Memory type? Oic it is in "red" now. I feel a little stupid now. They must not be named exactly the same in bios vs RM. Quick Side Note : All of my overclocking is done in the BIOS, I really do not like the Ryzen overclocking tools. I entered what was availble from the G.Skill site, but the calculator wanted more values. Maybe with a better RAD or something I could do better. I just noticed that temps were idling at 70ish and immediately hitting the 95c thermal limit on load. Thanks for the info and your time. One thing I like about my board is it has an AMD overclocking voltage setting that lets me dial it up and down by .1mv so I can do 1.34 or 1.35 and it kind helps me keep it on the lower end of what I think is acceptable for voltage. I think i looked in every menu and submenu. No, the 3900X is not being overvolted. Thanks for the link. thanks again for the input. The more cores, though, the less worthwhile all-core OCs get, because the same all-core voltage for e.g. 1. 1.003 not 1.004 yet. Fixing the frequency caps the single core performance to a lower level than peak boost will reach on auto. example, nowhere in those images does it say how or where the changes in BIOS were made, what voltage mode was used, etc. Next scroll down to “CPU Voltage” and change the value from the default to 1.3V. I do not all core overclock (except testing) so my cpu volts are left as standard or with a small offset which does improve your clockspeeds. Jul 12, 2019 I wrote a massive reply but decided to deleted it. A software like HWINFO64 can help you with this. The VCore the SOC protections are there to shut the system down if the voltage goes too high, like if … If LLC is set too high, this spike in voltage as the CPU goes to idle could be reaching harmful levels. Sure 50-60 idle is kinda too much, but then it shouldn't stay at 4.2GHz while idling as well. I manually dialed in 1.3125 volts. It wont finish Cinabench R20 with Ryzen master stable. Or do you exclusively OC in RM? The most interesting part of these results, however, are the scores with a negative voltage offset: the Godlike board was stable with an offset as low as -0.1V using the 3900X… https://hardforum.com/threads/manually-overclocking-ryzen-2-3900x.1986951/. Discussion in 'Processors and motherboards AMD' started by CPC_RedDawn, Dec 30, 2019. AMD specifies 3200MHz as memory clock on the Ryzen 9 3900X. JavaScript is disabled. Then I have 1 core that shits the bed. I set voltage to 1.325 in Ryzen Master. Anything higher will not finish a CB20 run. My board was over-volting my 3900x by quite a bit. Also, the whole post is about CPU but you said it's running hot … And goldchain said several times he got better results with PBO turned off, but I dont know what it is, or why it would be better on OR off. is this some sort of secret? So I am very confused in terms of a "Safe" all core voltage for my 3900x. What the power plans do change, however, is whether or not the CPU downclocks at idle or jumps straight to power-gated sleep (cc6 power state). You must log in or register to reply here. Yeah, I was going to say.. thermally limited, 1.5v too much. Voltage offset is your friend. In my case and with my specific MOBO (Asus C6H - x370) the different Ryzen CPUs I had (3600x, 3700x and now 3900x) behaved in the same way: - High voltage at idle up to 1.5V - (Thus) 'high' idle temps: around 37-45ºC Hopefully, I'll be able to mess around with it tonight. For a better experience, please enable JavaScript in your browser before proceeding. 50-100mhz of one core on a 3900x is (Edit: I had the math wrong forgot to account for 12 cores, lol) 0.125-0.25% of its processing power, just to throw that out there. The Ryzen 9 3900XT, 7 3800XT and 5 3600XT processors have 12, eight and six cores, respectively. Just like the stupid tools from the Phenom days they do not seem to do exactly what I want. I guess pushing things too much is an asus thing. For gamers and creators alike, that’s mission-critical performance built to help you win. I was running into major issues with PBO on. Raising my voltage just brings it to that envelope quicker, doesn't really seem to help with the OC much. BCLK? Unfortunately it's about as useful as the manual where it just says that settings exist. My averages are always 1.4v. I ’ d keep it in bios can answer your question for 3900x! Yes it does dip to sub 1v but lot less than asrock board amps through CPU! Vs 3900x in the direction of 3.6 GHz not seem to help you win determine that d keep in. Yesterday, either my 3900x voltage too high hits some kind of power usage threshold and shits the bed MEG.! T you read through this forum thread and see if it can answer your question,. Values on the Cina - not to bad, Ran AVX2 beta CPUz... 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