Ah right. I read about that. Hopefully there will be a V4 exploit in the future 
QK9B is a QS, runs on (dual) asus asrock rack and supermicro mobo, the advantage is the same cpuid(406F1) than the prod.unit.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
should be ok, it is the official QS@RolloZ170 thank you for your input - looks like QS is a better bet
I done more research and found that the E5-2650L V4 has got even higher efficiency/per core for power draw
is the QK93 stepping okay?
Intel Xeon E5 2650L V4 QS QK93 SR2N8 1.7GHz 14Core 35M LGA2011-3 Processor CPU | eBay
this looks promising
Thanks again
efficiency is better at low ghz, from 3 to 4 ghz the drawn power is doubled and so on.......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.
I am aware of the frequency uses power and generates heat.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.
sure, but this is the wrong place for thatI 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.
sure, but this is the wrong place for that![]()
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.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.
AFAIK BIOS and MoBo must support VT-d too.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.
You CPU need latest microcode support,because some errata in v3/v4 causes PSOD in Esxi and other VM.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.
If you buy a QS, check if the prod.unit version supports VT-d.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.
OK.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.....