ES Xeon Discussion

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kousuke

New Member
Jul 18, 2017
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Greetings,

I'm looking to setup a dual socket low power homelab mainly for VMs

E5-2628L V4 is pretty much what I have in mind and found these steppings on ebay:

QHV8
Intel Xeon Processor E5-2628L v4 ES CPU 1.5GHz 12-Core 30M 65W Low Power QHV8 | eBay

QS QK9B
Intel Xeon E5-2628L V4 QS QK9B 1.9G 12-Core 24-Thread CPU Processor | eBay

Not too sure which server mainboard can I pair the CPUs with - can I even use Xeon ES on dual socket config?

I'm going this route as the Xeon D-1587 out of my budget

I'd appreciate any inputs

Thanks in advance
 
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RolloZ170

Well-Known Member
Apr 24, 2016
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kousuke said:
Greetings,

I'm looking to setup a dual socket low power homelab mainly for VMs

E5-2628L V4 is pretty much what I have in mind and found these steppings on ebay:

QHV8
Intel Xeon Processor E5-2628L v4 ES CPU 1.5GHz 12-Core 30M 65W Low Power QHV8 | eBay

QS QK9B
Intel Xeon E5-2628L V4 QS QK9B 1.9G 12-Core 24-Thread CPU Processor | eBay

Not too sure which server mainboard can I pair the CPUs with - can I even use Xeon ES on dual socket config?

I'm going this route as the Xeon D-1587 out of my budget

I'd appreciate any inputs

Thanks in advance
Click to expand...
QK9B is a QS, runs on (dual) asus asrock rack and supermicro mobo, the advantage is the same cpuid(406F1) than the prod.unit.
there is an errata that crashes vm mashines, this is solved by microcode ver 2B an up.
the QHV8 is early stepping(cpuid 406F0) this microcode stucks at rev 14, no more errata will be solved for those cpuid.
pls search also for "Xeon E5 2628 Lv4 QS" gives different results
 
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Evan

Well-Known Member
Jan 6, 2016
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What do you base efficiency per core on ?
The relationship between a benchmark (which one ?), number of cores and speed, turbo bin's, tdp, t-case temp ?

I am only asking as the whole discussion kind of makes sense sometimes and then you through in t-case temp into the discussion and it goes funny again, e.g. The e5-2628lv4 has a really high t-case temp (or at least higher than the other specs would suggest)

When you talk about efficiency then how does e5-2640v4 vs e5-2680v4 look ? One is a single ring the other a dual ring CPU , how is the base power draw for example ? What effect does dual ring have in a positive or negative way ? The work done per core say based on basic passmark suggests the 2640v4 is much more efficient and also runs cooler at a given TDP but I can't really make that statement as I don't know the specifics of how to rate efficiency.
 
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RolloZ170

Well-Known Member
Apr 24, 2016
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Evan said:
What do you base efficiency per core on ?
The relationship between a benchmark (which one ?), number of cores and speed, turbo bin's, tdp, t-case temp ?

I am only asking as the whole discussion kind of makes sense sometimes and then you through in t-case temp into the discussion and it goes funny again, e.g. The e5-2628lv4 has a really high t-case temp (or at least higher than the other specs would suggest)

When you talk about efficiency then how does e5-2640v4 vs e5-2680v4 look ? One is a single ring the other a dual ring CPU , how is the base power draw for example ? What effect does dual ring have in a positive or negative way ? The work done per core say based on basic passmark suggests the 2640v4 is much more efficient and also runs cooler at a given TDP but I can't really make that statement as I don't know the specifics of how to rate efficiency.
Click to expand...
efficiency is better at low ghz, from 3 to 4 ghz the drawn power is doubled and so on.......
the more cores the more die in size, more area to cool heat...
t-case is important at passive cooling, if you cool active dont think so much about that.
all frequency at/under 2,5 ghz runs cool.
 
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Evan

Well-Known Member
Jan 6, 2016
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RolloZ170 said:
efficiency is better at low ghz, from 3 to 4 ghz the drawn power is doubled and so on.......
the more cores the more die in size, more area to cool heat...
t-case is important at passive cooling, if you cool active dont think so much about that.
all frequency at/under 2,5 ghz runs cool.
Click to expand...
I am aware of the frequency uses power and generates heat.
I am sceptical when somebody claims X is more efficient than Y as in general for a given core generation they idle similar and the TDP etc is an artificial limit on how much workload a chip can do simply to keep its power consumption and heat within spec.
There is an argument that the high ghz chips are actually more efficient since they are a better bin from the production line they operate with lower power and heat at lower frequency compared to say a TDP limited CPU.

I am sure the internal cpu config, eg number of rings has a difference as scaling changes below 10 core to above 10 core for example.
 
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RolloZ170

Well-Known Member
Apr 24, 2016
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Evan said:
I am aware of the frequency uses power and generates heat.
I am sceptical when somebody claims X is more efficient than Y as in general for a given core generation they idle similar and the TDP etc is an artificial limit on how much workload a chip can do simply to keep its power consumption and heat within spec.
There is an argument that the high ghz chips are actually more efficient since they are a better bin from the production line they operate with lower power and heat at lower frequency compared to say a TDP limited CPU.

I am sure the internal cpu config, eg number of rings has a difference as scaling changes below 10 core to above 10 core for example.
Click to expand...
sure, but this is the wrong place for that ;)
 
G

gtz

Member
Aug 23, 2016
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Nanotech said:
Did anyone notice how prices of the E5-2683 V3 OEM has risen in price? It seems months ago it was around the $300+ range even for QS and now similar QS and OEM processors are at least $400+. I was actually considering this same processor but decided against it before due to the weak turbo clocks compared to something like a E5-2697 V3.
Click to expand...
People are actively looking for that particular chip too. I originally bought my 2683V3 for 260. When I sold it, I sold my 2695V3 as well. The 2683 sold for 413 and the 2695 sold for 420 (broke even on the 2695 after fees). I found it odd that the sold for only a few bucks more. But yes like you said in a future post (weird) the hack did drive up the price of V3 chips.
 
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Alex Iatan

New Member
Jul 25, 2017
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I intend to build a home lab based on Asrock EPC612D4I. (LGA2011-3) with Esxi 6 hypervisor
I also need video hardware acceleration for CAD software. - ATI Radeon GPU PCIe card to be passtrought to a windows VM.
I understand that ES processors don't have VT-d capabilities so it will be impossible to do the pci passtrought.
The QS processors have this ability - the VT-d capability?
Or just the OEM genuine ones?
Thanks in advance for your time to answer.
 
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RolloZ170

Well-Known Member
Apr 24, 2016
9,922
3,188
113
germany
Alex Iatan said:
I intend to build a home lab based on Asrock EPC612D4I. (LGA2011-3) with Esxi 6 hypervisor
I also need video hardware acceleration for CAD software. - ATI Radeon GPU PCIe card to be passtrought to a windows VM.
I understand that ES processors don't have VT-d capabilities so it will be impossible to do the pci passtrought.
The QS processors have this ability - the VT-d capability?
Or just the OEM genuine ones?
Thanks in advance for your time to answer.
Click to expand...
AFAIK BIOS and MoBo must support VT-d too.
some real ES v3 have VT-d.
QS will be useless without VT-d ;) (if prod.unit supports)
 
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RolloZ170

Well-Known Member
Apr 24, 2016
9,922
3,188
113
germany
Alex Iatan said:
I intend to build a home lab based on Asrock EPC612D4I. (LGA2011-3) with Esxi 6 hypervisor
I also need video hardware acceleration for CAD software. - ATI Radeon GPU PCIe card to be passtrought to a windows VM.
I understand that ES processors don't have VT-d capabilities so it will be impossible to do the pci passtrought.
The QS processors have this ability - the VT-d capability?
Or just the OEM genuine ones?
Thanks in advance for your time to answer.
Click to expand...
You CPU need latest microcode support,because some errata in v3/v4 causes PSOD in Esxi and other VM.
get QS or same stepping than prod.unit and you going fine.
 
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Alex Iatan

New Member
Jul 25, 2017
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Thank-you for your quick answer. The mobo support VT-d. Now the CPU must support it. How can i be "safe " on buying an QS V3 E5 processor from Ebay. I learned that i may be screwed up. Could you, when you have some little time, advice me in that direction. What should i be aware of...
Thank you again for your patience.
 
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RolloZ170

Well-Known Member
Apr 24, 2016
9,922
3,188
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Alex Iatan said:
Thank-you for your quick answer. The mobo support VT-d. Now the CPU must support it. How can i be "safe " on buying an QS V3 E5 processor from Ebay. I learned that i may be screwed up. Could you, when you have some little time, advice me in that direction. What should i be aware of...
Thank you again for your patience.
Click to expand...
If you buy a QS, check if the prod.unit version supports VT-d.
there are SKU's that don't have VT-d.
QS have same base clocks/turbo ratios than prod.units. brand string is complete(not only "genuine intel")
how man cores u r looking for ? base clock ?
aware of NOT QS cpu ;)
remember: even if the seller writes QS, must not be one.
 
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Alex Iatan

New Member
Jul 25, 2017
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I was intending for 12 to 14 cores max. Probably 12. Base clock: i dont know....sorry, newbie, mobo support DDR4 2133 ECC SO-DIMM, but i think that is a wrong answer.....
 
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RolloZ170

Well-Known Member
Apr 24, 2016
9,922
3,188
113
germany
Alex Iatan said:
I was intending for 12 to 14 cores max. Probably 12. Base clock: i dont know....sorry, newbie, mobo support DDR4 2133 ECC SO-DIMM, but i think that is a wrong answer.....
Click to expand...
OK.
$150...$200 E5-2648Lv3 QS 12C 1.80ghz remarked SR1XW or QFR2
$250...$300 E5-2628LV4 QS 12C 1.90ghz remarked SR2NC or QK9B
 
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Alex Iatan

New Member
Jul 25, 2017
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Thank you a lot. I will do a deep search and ask the seller to show me a screen of Intel Diagnostic Tool with VT-d: yes.
 
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