ES Xeon Discussion

NablaSquaredG

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Well I think if the TDP is the only issue with mobo compatibility, I'm gonna go for it. Just need more airflow to keep those VRMs nice and cool
 

fake-name

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I'm considering picking up a machine with 2 Xeon Silver 4214 QRG6 2.20GHz 12C.

These are cascade lake parts, and from what I can find they aren't the same sSpec as the released variant of this processor (which is SRFB9). I think the primary difference is SRFB9 supports DDR4-2400, whereas these only go up to DDR4-2133, but I can't find much more about them.

I'd be using these for a virtualization host. Is there anything I should be concerned about for that? Since the cascade lake release was the (second!) "optimization" step of intel's "PAO" model, I'd think it'd be less likely to have issues then the others.
 

RolloZ170

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I'm considering picking up a machine with 2 Xeon Silver 4214 QRG6 2.20GHz 12C.
QRG6 is the Silver 4214 stepping L0 QS version.
SRFB9 is Silver 4214 stepping L1 prod. unit.
(edit) there is also a 4214Y and 4214R
typicaly the QS have the same memory frq. spec. than the prod.unit. i wonder if the QRG6 can't go 2400 as the SRFB9.
 
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fake-name

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Good to know. Is that from https://www.cpu-world.com/sspec/QR/QRG6.html ?

I see that Xeon Silver 4214 - Intel - WikiChip lists it as the "QS" s-spec, but I don't think they list any devices as "ES", at least that I can find, so I'm uncertain if it's just "they call everything QS", or if it's actually a qualification sample, rather then an engineering sample.

Are you certain it's the QS version, rather then the ES version? I'm ok with the lower ram speed, but if there are issues with using it as a VM host it won't work for me.
 
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RolloZ170

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Are you certain it's the QS version, rather then the ES version? I'm ok with the lower ram speed, but if there are issues with using it as a VM host it won't work for me.
first a QS is a Engineering Sample too.
a QS is the final version of the (matching)production unit with same stepping only with the ES bit set.
you see i.e. in CPU-Z the full brand string and on the right the (ES) note from cpu-z. in the BIOS you see the full string too.
If you have e early ES version you see only "genuine intel" or "0000%@".
note that there are more Silver 4214 than one. ther are two steppings arround, the L0 and L1.
the QRG6 is the QS of the L0 stepping 4214.
the ram speed is not lower, sure if you put 2133Mt RAM in, it will be ran with 2133Mt.
 

fake-name

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first a QS is a Engineering Sample too.
a QS is the final version of the (matching)production unit with same stepping only with the ES bit set.
Sorry, yeah, I get that. Basically, I'm worried that QRG6 is a early ES version, e.g. more likely to have issues.

the ram speed is not lower, sure if you put 2133Mt RAM in, it will be ran with 2133Mt.
At least CPU-World calls out the QRG6 as "The processor supports DDR4-2133 memory.", while the SRFB9 is documented as supporting DDR4-2400.

Mostly, is this stuff documented somewhere? That way I can answer my own questions.

I had at one point thought that the "Q" in QRG6 meant QS, but I've seen other CPUs (e.g. QHUY) that start with Q and are early ES CPUs.

Basically, how do you delineate between QS CPUs and non-QS ES CPUs?
 

fake-name

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my QRG9 is a 5215 QS L0. the prod.unit 5215 supports 2666 and my QRG9 too.
I guess my question then is if you can generalize from sequential s-spec values (is that what you're doing?). QRG6 is a 4214, QRG7 is a 4215, QRG8 is a pentium 4?, and QRG9 is 5215. It seems like they're not purely sequential.


Anyways, reading back through the last 10 thread pages, I found some of your comments about no bad ES cascade lake parts (which this is), so I think I'll pull the trigger on it.
 

RolloZ170

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I guess my question then is if you can generalize from sequential s-spec values (is that what you're doing?). QRG6 is a 4214, QRG7 is a 4215, QRG8 is a pentium 4?, and QRG9 is 5215. It seems like they're not purely sequential.
q-spec(Qxxx PRE) not s-spec(SRxxx PRD)
yes if a QRGx is a scalable, it will be close the the other.
QRG8 is Xeon Silver 4216.
Pentium 4 QRG8 maybe wrong, but there are doubles.
note that the Q-spec has turned arround to the start already.
 
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RolloZ170

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At least CPU-World calls out the QRG6 as "The processor supports DDR4-2133 memory.", while the SRFB9 is documented as supporting DDR4-2400.
found some add. specifications. you are right, the QRG6 (L0 cpuid50657) supports only 2133Mt memory.
the SRFB9 is stepping L1 cpuid50657 and supports 2400Mt.
 

RolloZ170

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Do some boards check the CPU TDP and reject it if it exceeds the rated board TDP of usually 205W?
Do Gigabyte boards do this?
some Gigabyte support more than the specified 205W, the Gigabyte mu71-su0 and Gigabyte C621-WD12, Gigabyte MD61-SC2
the TDP is half the truth. the 240W OEM cpu draws more long time current and the VRM overloads.

supermicro do, if you see max. TDP 205W the 240W cpu will not start.
there are some third party 270W supermicro X11DPi-N(CT) & X11DAi-N(CT) with updated VRMs.

ASRock EPC621D8A does, but supports up to 255W because of the W-3175X.
same seems to EP2C621D8, EP2C621D16-4LP, EP2C621D12 WS but they don't have the W-3175X is the support list.
 

NablaSquaredG

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supermicro do, if you see max. TDP 205W the 240W cpu will not start.
there are some third party 270W supermicro X11DPi-N(CT) & X11DAi-N(CT) with updated VRMs.
What do you mean by third party? Third party BIOS or hardware mods? Where are they sold?

Are there any other 240W capable boards that are suitable for a server? e.g. C621-WD12 is not, because the sockets are turned. C621-WD12 is not good, because you can only use really short PCIe cards

EP2C621D16-4LP and EP2C621D12 WS look good though.

I only bought the Gigabyte MD71-HB0 because it was comparably cheap.
I've found a Chinese seller with QPLA CPUs. The seller says 240W, but their CPU-Z screenshot and your CPU list (you removed the QPLA, but it's still in the google cache) said 205W. Will it work on the MD71-HB0?