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AM4 end of life upgrade CPU 5800x3D / 5900x / 5950x.

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5800x 5800x3d 5900x 5950x
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Discussion starter · #41 ·
damric said:
I've got a 5800x, a 5800x3d, and a 5950x. The 5800x runs the hottest and I can't tell the difference in 4K gaming. The 5950X does turbo to 5050MHz. The 5800x is able to +200MHz pbo boost to also 5050MHz.

I also have a $100 Ryzen 5 5500 and really once I tweaked that one it runs 4K games just as well as those above.

I use the 5950X for computations, and it's more stable if I just dial in a flat clock speed. The PBO/CO is just trash for that one. Eco mode works ok though or manually tuning all the power limits, but at that point I'm back to flat overclock anyway.
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I heard CO can get quite unstable on idle. I know my 3800x would get unstable on idle while using EDC bug + BCLK OC, only higher voltage such as 1.525v would fix that near 4.8 GHz single core, old bios. New bios does not boost this high.

I reckon 5950x can get quite hot running static OC at any decent core clock.

munternet said:
I love my 5950X. It's been rock solid since the build when the CPU was first released. Never had a PC this stable for so long! Ran the IF at 2000 for a while but it wasn't 100% stable in games so dropped it to 3800 and ran extensive tests. Ram is 2x16GB .Each core is set individually and tested with P95 extensively. I forget the software/batch-file or whatever I used but it was well made.
I can't say which is best but this one has a great IMC. The PC was in the top 10 desktop PC's on Passmark for a while.
It actually felt snappier for opening games and switching activities etc than my Intel setup at the time also
Anyways, I just wanted to say I still love it and it hasn't missed a beat after all these years :D

View attachment 2604452
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This is quite interesting. My 3800x actually was doing stable 1900 IF, but after short time it degraded and was unstable with that clock. Which is weird, because I didn't abuse CPU in any way and it was always running cool. But regardless it dropped to 1833 stable and was completely stable at 1833 from that point. I wonder if Ryzen 5000 also had this same fast degrade issue.

Also that could be caused by bios update. But it's not likely.
 
#42 ·
PotatoVonEpicus said:
I heard CO can get quite unstable on idle. I know my 3800x would get unstable on idle while using EDC bug + BCLK OC, only higher voltage such as 1.525v would fix that near 4.8 GHz single core, old bios. New bios does not boost this high.

I reckon 5950x can get quite hot running static OC at any decent core clock.
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For protein folding I have it dialed in at 4300MHz 1.2v and it runs in the low 70s under water. I chose those settings since that's where it would hover when left to the boosting algorithm. I just got tired of it restarting so when those kinds of workloads are needed I switch to my all-core profile in BIOS.
 
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Discussion starter · #43 ·
damric said:
For protein folding I have it dialed in at 4300MHz 1.2v and it runs in the low 70s under water. I chose those settings since that's where it would hover when left to the boosting algorithm. I just got tired of it restarting so when those kinds of workloads are needed I switch to my all-core profile in BIOS.
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I assume that is Prime95 AVX2 stable? Since folding can push CPU quite a bit, 1.2v still should be okay. But going for higher overclock closer to 4.5 all core would get really toasty with 16 core CPU.

I think 5900x might make more sense for all core overclock.
 
#44 ·
PotatoVonEpicus said:
I assume that is Prime95 AVX2 stable? Since folding can push CPU quite a bit, 1.2v still should be okay. But going for higher overclock closer to 4.5 all core would get really toasty with 16 core CPU.

I think 5900x might make more sense for all core overclock.
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Indeed. But FYI Folding is more brutal than Prime :D
 
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#46 ·
PotatoVonEpicus said:
Yet to see anything more brutal than Prime95 small FFTs AVX2 for static overclock on Ryzen.
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Run folding@home overnight on a 5950x with static OC and get back to me :D
 
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#48 ·
PotatoVonEpicus said:
What did you use to stress test that 4.3 GHz static overclock? Also does folding@home use AVX or AVX2?
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Everything? I find Y-cruncher and Linpacks pretty hard too. It passed all that crap and Prime on the first try so I'll try lower voltage or higher clocks when I get more time.

Yes most of the work units use AVX for CPU.
 
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Discussion starter · #49 ·
damric said:
Everything? I find Y-cruncher and Linpacks pretty hard too. It passed all that crap and Prime on the first try so I'll try lower voltage or higher clocks when I get more time.

Yes most of the work units use AVX for CPU.
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Linpack usually is heavier on Intel. Regarding Prime95 you should run Small FFTs in specific for few hours with AVX2 enabled. But regardless, I think it's quite good sitting at 4.3 GHz with 16 cores. Still have voltage headroom, but probably not worth pushing further for these long and heavy CPU runs. Since it would get quite warm.

And folding@home using AVX explains the heat and it being brutal on CPU.

If I invest in 5950x I know I would be wanting to have 4.5 GHz static or higher OC, which might be quite complicated to cool down. Especially if I want Prime95 AVX2 stability.
 
#50 ·
PotatoVonEpicus said:
Linpack usually is heavier on Intel. Regarding Prime95 you should run Small FFTs in specific for few hours with AVX2 enabled. But regardless, I think it's quite good sitting at 4.3 GHz with 16 cores. Still have voltage headroom, but probably not worth pushing further for these long and heavy CPU runs. Since it would get quite warm.

And folding@home using AVX explains the heat and it being brutal on CPU.

If I invest in 5950x I know I would be wanting to have 4.5 GHz static or higher OC, which might be quite complicated to cool down. Especially if I want Prime95 AVX2 stability.
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With the settings as they are, temperature is of no concern since it's folding around 70-75C, but that's with a full motherboard block on the Taichi and a 1080mm copper radiator sitting above the case:
Electronic instrument Gadget Rectangle Gas Bumper
 
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Discussion starter · #53 · (Edited)
I decided to not invest too much into AM4 anymore and I bought 5700x. Mainly because I wouldn't benefit from x3D chip and because 5900x didn't seem like a good deal at 350 euros or so.

5700x is probably best upgrade value for AM4 right now. Also stock settings are disgustingly bad for rendering and such things on 5700x, luckily it's fully unlocked and I can pretty much have 5800x or higher performance with this chip. Again, best value CPU for AM4.
 
#54 ·
PotatoVonEpicus said:
I can pretty much have 5800x or higher
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No not higher, you will always have a 200MHz disadvantage. 5900X is a beast, especially with older AGESAs. X3D is ok, system is a lot calmer with fans compared to a highly tuned 5900X. In F@H I had it tuned to run at 4500-4600MHz at 80c. I flip flop between my X3D and 5900X weekly it seems :D

Also, if PBO is unstable at idle, you have issues with you're tune.
 
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Discussion starter · #55 ·
Owterspace said:
No not higher, you will always have a 200MHz disadvantage. 5900X is a beast, especially with older AGESAs. X3D is ok, system is a lot calmer with fans compared to a highly tuned 5900X. In F@H I had it tuned to run at 4500-4600MHz at 80c. I flip flop between my X3D and 5900X weekly it seems :D

Also, if PBO is unstable at idle, you have issues with you're tune.
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I was talking about stock 5800x. Price wise 5900x didn't make sense over AM5 for me and I didn't really want to get AM5. So I just got 5700x. I only had stability issues running 4.7 - 4.8 static OC or while using -30 CO. Otherwise it was very easy to get this 5700x stable.

Regarding full load clocks I am pretty sure they are exactly the same like 5800x would run with same tuning. Only difference is that there is clock cap for 5700x ( which might also be capped by board ), which is 4850 MHz.

Pretty much just around 200 MHz loss for single core boost. It's not really significant from performance perspective, I still wanted to hit that 5 GHz though.
 
#56 ·
Sprinkle some base clock and go for 5GHz
 
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#58 ·
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#60 ·
PotatoVonEpicus said:
That's quite high actually. I have MSI Towahawk Max II and it maxes out at 100.75. Which is perfectly stable, but anything higher than that causes issues. Don't think it's worth messing with BCLK for minimal gains.
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What issues?

If the max turbo of a 5700x is 4.6GHz, then 104+200 PBO will get you 4992MHz. If you can't get it stable it's because you need to tune your memory controller and voltages to compensate. If your board does .25 bclk increments than it's even easier.

The only other thing you might need to do is lock PCI gen to what you want. For B450 you lock it to GEN3.
 
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