Turning on only 2/3 of the cores will increase the base clock. Instead, the core cache disappears along with it. haha.it's not a supermicro/tyan or ASRock, so why not
1.7 Ghz base
not a QYFQ or QYFP ?
I remember it was QYFQ.
ES Xeon Discussion
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I remember it was QYFQ.
Confirming that R06 with ES QYFS and MS03-CE0 works. Also getting rebar now. Not seeing any side-effects.
Thanks for the awesome support of this forum!
Why are the BIOS so slow to boot on server motherboards is beyond me (after all the init stuff). I suppose it's not an important feature of those compared to home PCs.
This is a pretty cost effective cpu, can it support 8 channel memory?
Additionally, as far as you know, does this CPU have any bugs?
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customer desktop BIOSs have many not important things removed.
if you have to reboot often something is wrong......
This is really pretty fast. I reduced Q03J to 30 cores. Then i get avg of around 3.43GHz on all 30 cores with HT, but only CB R23 45K. I think you found a Pareto point cost performance wise. Thanks for sharing.
MCC has higher performance power ratio, and can be faster through undervoltage
yes, it support 8 channel memory, but memory bandwidth is 20% lower than E0, maybe that's a bug in D0 and R0.
The test score on aida64 fp64 is different every time (40k+-20%), which does not occur on E0.
@RolloZ170 Can D0 got stable score in the fp64/fp32 test ?
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don't know. but first the TDP can be exceeded, some time later not.
you have to build comparable environment.
I have a ASROCK w790 ws, is Q071 available on this motherboard? There is very little info of this cpu on the web.
No clear, but there are reports that it work on ASUS W790. and D0 work on AsRock W790.
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This is very true, when i do a "cold" start up i get CB R23 67K. But when it is a little warmer from before, i some times only get 60K. It is very strange and not like my cpu is very hot only 50° or so, and max 64° on full load. should be far away from thermal limit.
It feels a bit random, maybe windows doing something else in the background.
unfortunaly i sold my ASUS W790 Ace and can not test SPR-SP R0 MCC on it.
but X13SRA-TF runs D0 and R0, so i am pretty sure ASUS/ASRock will do.
Note: my board was delivered with old Test BIOS w.old ME, you willl probably not get this BIOS.
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prod.stepping / QS: yes
"machine for development / kernel" sounds like a professional environment. with a company in background please ask intel for QS (for free)
NON prod.stepping ES: NO
these ES are for motherboard/driver/BIOS engineers to build up things / find bugs, before launch of processor generation.
ES have bugs (even in the final sapphire rapids prod.units are still over 100 errata)
if you do kernel development and get into issue, you never know if it's your code or the ES/machine.
sapphire rapids provides Golden cove cores(Alder Lake) which are relatively error-free, but the uncore, accelerators, memory controller etc. are all new.
So does the spr e0 can be used for kernel/system development?
Do you have the changlog for the cpu stepping of spr?
So look like we need prod spr for development.
no, its ES1 first/second of SPR silicon re-design.
QS are made for this if you don't want to buy retails CPUs.
Intel never published changelog for their SPR steppings, as far as I've heard, they've provided them to big customers under NDA but it was never leaked by any of them.