Higher power Intel CPUs on MB - LGA4677 question

[sam55todd]

My X13 SuperMicro motherboard supports 350W Sapphire Rapids LGA4677 CPUs, but I've seen some Xeons traded having higher factory TDP (specifically 385W) - it has compatible with MB production stepping (not ES/QS).

What happens if I plug this CPU into MB? Will it boot to BIOS ? (where I can change configuration to use less cores via Speed Select Technology or other alternatives)
Don't want to figure this out in experimental way because this would be an unnecessary risk (extra postage costs if CPU needs to be sent back and MB might get fried without any warranties if this is something crazy to do on a first place).

I've seen something similar discussed here but that was about Dell (225W CPU into dell supporting 185W CPUs only if I'm not mistaken, resulting in no boot at all {CPU not detected, but after everything returned back to original configuration - all is operational, so no damage}, but that's Dell with range of their artificial restrictions therefore can not be extrapolated on other MBs manufacturers)

Thank you.

 

[Ernest(EU)]

I own Asus Pro WS W790-ACE thinked i can put whatever sapphire rapids early sample i own. Gues what they dont work.
Intel Confidential Xeon QYFP ES2 D0 48C/96T the only confirmed to be working. I will probably ask peoples to create thread about LGA 4677 cpus. Each of them have purpose of use. Like some of them will be better for gaming and rest for AI or mass computation. But seems i cant find info about that.

 

[Deleted member 100688]

Not all mainboards support all SKUs. If it's limited to 350W, it's reasonable to assume that SKUs over 350W are not supported by the BIOS. If you still put such a CPU in the socket, most likely nothing will happen. System won't boot, black screen, maybe the board will tell you that you've put an unsupported CPU in the socket (if they bothered to implement such a feature). POST code will probably be something like CPU initialization (at which point the POST failed and the system is stuck).

 

[RolloZ170]

My X13 SuperMicro motherboard supports 350W Sapphire Rapids LGA4677 CPUs, but I've seen some Xeons traded having higher factory TDP (specifically 385W) - it has compatible with MB production stepping (not ES/QS).

the infamous TDC is std. 550A
you can buy combinations X13DEI + 2x 8488C (385W) at taobao.

 

[sam55todd]

the infamous TDC is std. 550A
you can buy combinations X13DEI + 2x 8488C (385W) at taobao.

That's an excellent info confirming potential compatibility, will try to make an offer on ebay (although most of members there are not actual owners of a product but are just resellers therefore can't really make adequate market-matching pricing - only minor flexibility within their profit margin, e.g. kuaka and their clone army, also bodorship, cheng3930/CSS1314, halbry, ZP000, Quark-Test, squaredseller, Sinobright, RUIXIU, INDMEM, yiermei, Jiu Dasheng, etc., all are not worth even starting with them).
Since some listings do have feasible return policies (even if it turns not to be defective, then I have to cover only shipping costs) and reasonable reputation/feedback - it might be worth the try (although chances are limited because as was mentioned above - most are only resellers).
I normally do keep a dozen pending low-ball offers on there worth up to $10K in total, sometimes it gets through.
Thanks.