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Discussion Starter · #1 · (Edited)
Since there is no such thread and plenty of people are interested how those new 2 chiplet Zen 3 processors are overclocking I'm starting a one. Post up your screens of OC's, cooler that you have used to do that, temperature under stability tests and a batch number if you know(it is placed on ryzen's IHS).

So here's mine:
Cooler: Noctua D15
Temperatures: up to 90 *C in blender rendering, AIDA CPU&FPU&Cache stress test in well ventilated case with many fans. Package power = 191W. VRMs on B550 Tomahawk after 1 hour AIDA test 52,5 *C on LL3 with 1000kHz swithing frequency.
Batch: 2037 SUS
Voltage: 1.2875V in bios on LL3 dropping to 1.269V(SVI2 TFN) under full avx load
Infnity fabric max stable frequency: who knows, currentyly 1900MHz is stable and more is not possible to achieve on newest MSI bios betas well basically noone can go over that on them and on older 2000MHz was rather easy to get, but it had plenty of whea errors - no crashes nor worse results.

CCX OC in bios:
CCX0 - 4725 MHz
CCX1 - 4600 MHz

Cinebench R20: 9306 points
Aida ram latency 62 ns with 4x16GB Crucial Ballistix 3200MHz CL16 @ 3800MHz 16-19-16-16-36-60 tRFC 580

2466617
2466618
2466619
 

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Looking forward to this thread.
 

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My 5900x must be a complete dud. It'll only boost to 4.4GHz all core and reaches 86c in an R20 run.

Full custom loop with 2 x 360 PE rads. Tried remounting several times, I really just think the chip runs hot.
 

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My 5900x must be a complete dud. It'll only boost to 4.4GHz all core and reaches 86c in an R20 run.

Full custom loop with 2 x 360 PE rads. Tried remounting several times, I really just think the chip runs hot.
What Mobo are you using? I was having the opposite issue where even with prime95 and OCCT the temp would not even reach over 60c.


I ended up updating the bios to the beta (x570 unify) and it fixed a few of the issues.


I have been hearing your problem with a lot of people with 5800x but it seems to be bios issues. Hopefully it is.

In saying that my cinebench only runs @4.2 to 4.3 all core. My score is about 8300ish

Single core was at 645 i believe.
 

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What Mobo are you using? I was having the opposite issue where even with prime95 and OCCT the temp would not even reach over 60c.


I ended up updating the bios to the beta (x570 unify) and it fixed a few of the issues.


I have been hearing your problem with a lot of people with 5800x but it seems to be bios issues. Hopefully it is.

In saying that my cinebench only runs @4.2 to 4.3 all core. My score is about 8300ish

Single core was at 645 i believe.
I'm using the Crosshair VIII hero. It's just very strange how this CPU heats up. It'll shoot up to 80c while at a couple percent load randomly while on the desktop.

I mean it's never thermal throttled at any point, and my cinebench scores seem to be in line with mainstream reviews.
 

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I just finished my rig a few days ago (well.....almost finished, still trying to find a @#@[email protected] 3080). Unavailable
I have not built a rig in almost 8 years....and have pretty much forgotten everything I learned back when I overclocked that one. Going to sit back and watch you smarter folks figure things out for a while before I do anything myself. Currently not even using XMP for the RAM...it is running at the "auto" 2666mhz due to a memory leak issue COD Cold War is having that causes the whole PC to shut down and reset, if XMP is used to set the RAM to 3600mhz (only game to do this, and has been confirmed to be a problem elsewhere). Can't wait to see what this beast will do eventually, once I feel like I've learned enough to avoid frying it. :p

As far as temps go, when I run Prime 95 for hours, it very occasionally hits mid 70's, and then the AIO fans speed up just a bit and temps drop back below 60C. When I run GAMES though (COD, Fry Cry New Dawn, Doom), temps hit mid to high 80's. This is my first build with liquid cooling and was really expecting better results than that going with the Arctic Liquid Freezer II 360. My temps don't seem any better than folks running air coolers.... ***...

20201128_074952.jpg 20201128_080638.jpg
 

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My 5900x must be a complete dud. It'll only boost to 4.4GHz all core and reaches 86c in an R20 run.

Full custom loop with 2 x 360 PE rads. Tried remounting several times, I really just think the chip runs hot.
Yes they are hot-running chips. My 8C/16T 5800x runs about ~10c hotter than my 12C/24T 3900x. I'm ALSO on a custom loop w/ 2x 360mm rads w/ 5800x+RTX 3080 on the loop.

My GUESS is that it comes down to the density of the new 8-core CCD -- it's just way more heat packed into a tighter area.
 

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I'm using the Crosshair VIII hero. It's just very strange how this CPU heats up. It'll shoot up to 80c while at a couple percent load randomly while on the desktop.

I mean it's never thermal throttled at any point, and my cinebench scores seem to be in line with mainstream reviews.
If you monitor the chip in operation, you'll notice that under single/dual-core CPU loads the voltage will spike up to 1.475-1.500vcore. This is perfectly safe and within Ryzen design specs, and is ALSO the reason you see those temperature spikes. My 3900x and now my 5800x both work the same way (tho mine are under water so the temp-spikes I see top out closer to 62c -- air coolers reach saturation almost instantly though, so youll see much higher temp-spikes)

It makes setting custom fan curves very difficult. My reccommendation is to run your system under a CPU+GPU stress test and monitor and other NON-CPU motherboard temps readingss (System temps // PCIe Temps etc) and use THOSE numbers to set your fan curves. Otherwise your CPU fan especially will be constantly spinning up and down as those temp spikes occur.
 

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Yeah I've come to terms with the temperatures now, I just can't for the life of me get this chip to boost above 4.4 all core with any PBO options. I can get it to "artificially" do it at 4.6, but the effective clock is much lower so I lose performance.

Coming from a 7700k so still getting used to how all this works. Very different compared to Intel.
 

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Both my 5950x and 5900x only go to 1.45v under single core workload. 5950x actually boost lower at 4.9GHz which 5900x goes to 4.95GHz.
 

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I have a question about motherboard compatibility for the 5900x.

I am a beginner who would like to get into overclocking for better gaming performance on 4k (perhaps it won't matter at that high resolution and all I have to worry about is overclocking the graphics card, 3080?).

Will the Asus TUF Gaming x570x Pro be a suitable motherboard to overclock the 5900x? The board is cheaper than the Crosshair VIII Hero and Dark Hero (good luck finding the latter).
 

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So turns out something is up with my loop. Tried the 5900x on the server which has an Asus x570 Pro and cine bench run is about 12c cooler at the same voltage and its only running a kraken x62.
 

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Yes they are hot-running chips. My 8C/16T 5800x runs about ~10c hotter than my 12C/24T 3900x. I'm ALSO on a custom loop w/ 2x 360mm rads w/ 5800x+RTX 3080 on the loop.

My GUESS is that it comes down to the density of the new 8-core CCD -- it's just way more heat packed into a tighter area.
I wouldn't think so, my 3800x ran hotter then the current 5900x.
 

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My 5900x must be a complete dud. It'll only boost to 4.4GHz all core and reaches 86c in an R20 run.

Full custom loop with 2 x 360 PE rads. Tried remounting several times, I really just think the chip runs hot.
Im genuin
Both my 5950x and 5900x only go to 1.45v under single core workload. 5950x actually boost lower at 4.9GHz which 5900x goes to 4.95GHz.
Are you saying your getting actual sustained load max boost speeds? Unlike the 3900xt :confused:
 

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Just finished building my system with minimal tuning.

Cooling: Noctua D15 /w conductonaut
Temps: 86C playing MS flight sim
Core: PBO +200mhz (auto boost to 4.7Ghz single thread or 4.4Ghz all core)
Voltage: Auto
Infinity fabric : 1900mhz (buildzoid told me to go offsync due to slower ram)
Memory: Hynix AFR B0 3000kit @ 3333 CL16 (ram from 2016)
GPU: Zotac 3080 trinity OC

2467988



2467989


I am happy with the current performance with MS flight sim with 50+fps @ 4k ultra
not sure if more all core overclock or faster ram is going to further increase my fps
more tuning soon
 
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