Xeon Platinum P-8124 & ASROCK EPC621D8A

RolloZ170

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Just a cautionary note about all those cheap 81xx 82xx Xeons:
There is literally a ton of them out there on ebay for cheap, but I think 50% or so are defective in one way or another.
take attantion to the BATCH of the processors, got these 8124Ms for $150 usd each.
2x 8124M sth 75.jpg
L039 = manuf.date 2020, KW 39
 

jasonsansone

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Sep 15, 2020
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take attantion to the BATCH of the processors, got these 8124Ms for $150 usd each.
View attachment 24543
L039 = manuf.date 2020, KW 39
Did some Google and eBay image searching. I couldn't find any P-8136 manufactured outside of 2016. I did find P-8124 for 2016 and 2017. P-8136 appears to have been manufactured exclusively in 2016. That makes sense being it was in production prior to H0 stepping and official release of SKX. Unlike the 8124M, there was no reason to manufacturer P-8124 or P-8136 after H0 was released.
 
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RolloZ170

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I couldn't find any P-8136 manufactured outside of 2016. I did find P-8124 for 2016 and 2017. P-8136 appears to have been manufactured exclusively in 2016.
Got a Platinum P-8124 from iamnypz with temp.problems, some cores went up to 107C even without turbo active.
after delidding(special thanks to gb00s for providing the WS 3647) the issue was apparently, totaly dried out thermal paste.
the surface is too big for me to use liquid metal, it runs everywhere but you can't view under the IHS.
reTIMed with MX-5 i got temps at 65C-70C degree under cbr20 load.
 

jasonsansone

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Got a Platinum P-8124 from iamnypz with temp.problems, some cores went up to 107C even without turbo active.
after delidding(special thanks to gb00s for providing the WS 3647) the issue was apparently, totaly dried out thermal paste.
the surface is too big for me to use liquid metal, it runs everywhere but you can't view under the IHS.
reTIMed with MX-5 i got temps at 65C-70C degree under cbr20 load.
I will keep an eye out for temps if I can get everything else working... I'm less worried about crusty old thermal paste and more worried about general compatibility / stability.

The last error I get and it somehow is showing up when no pci slots are even populated and all I have is the cpu, ram, motherboard, psu and that's it. ethernet is plugged in to a single port and the ipmi dedicated port...
Apparently I have too much free time today as I wait on my boards and chips...

The screenshot shows errors on two PCIe devices - 8086:37c0 (PCI bridge) and 8086:2031 (Sky Lake-E PCI Express Root Port B).

Those devices are present on lots of boards with the C621 chipset, including many Supermicro motherboards, but interestingly are not present on X11SPL-F. What does that mean for me? Who knows!
 

RolloZ170

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Those devices are present on lots of boards with the C621 chipset, including many Supermicro motherboards, but interestingly are not present on X11SPL-F. What does that mean for me? Who knows!
the Sky Lake-E PCI Express Root Port is located in the processor.
 

jasonsansone

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Good News: CPU's arrived. Manufacturing dates are Week 1 of 2017 (2x are identical batch) and Week 45 of 2016. Condition is grade A. They almost look like spares. There aren't any scratches or marks from a cooler, zero old thermal paste anywhere, including in the two vent holes on the IHS that are impossible to fully clean out... they look like a brand new chip.

Bad News: Swapped the motherboard in first chassis. The X10DRi-LN4+ is a massive EE-ATX which extended closer to the PDU. The new X11SPL-F is an ATX board. The 24-pin ATX power cable isn't long enough. I won't be making any further progress today.
 

jasonsansone

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So I got the pci errors sorted, seems that the system reported it but after cleaning off the pads it's fine. I did also have a bad ram stick which didn't help. Running the p-8124 under 100% load hit 77c so it's fine. Sadly installing using the proxmox iso always fails, likely something either not in the iso or something that is there that causing the instant crash as even during the install the system will hard crash due to it. So i'll just run them at 100% load on cpu and ram for 7 days to see how it goes.
Giving me hope! Great progress!
 
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RolloZ170

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I did also find of the 7x p-8124 chips I have with me atm that 2x of them instantly hit 107c under 100% load so looks like i'll be delidding some chips. Any recommendations or tips for the lga 3647 platform is appreciated.
img_20220830_162356cc86c3q.jpgP-8124(some cores 107C) delidded with WS 3647(der8auer)
just clean it: i have removed the black high-temp.silicone only on the IHS and used MX-5
 
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jasonsansone

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With very rare and limited exception, Intel CPU’s topped out at 165W TDP prior to SKX. The jump up to 240W is significant. I suspect the long term failures of thermal paste and some cores in P-8124 are related to engineering larger power draw CPU. Also possible cooling for the hotter chip at Amazon or wherever was inadequate. I haven’t had these problems with the P-8136 at 165W.
 

RolloZ170

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The jump up to 240W is significant.
only custom OEMs
I suspect the long term failures of thermal paste and some cores in P-8124 are related to engineering larger power draw CPU.
goes in hand with the high core frequency, the frq/draw courve in not linear.
Also possible cooling for the hotter chip at Amazon or wherever was inadequate.
time is money, they don't care.don't wait for failure, just replace after X month and go...
I haven’t had these problems with the P-8136 at 165W.
lower frequencies.
have a Microsoft(Azure) Olympus dual 3647 motherboard, it has two BIOSs - one includes B1 microcode.