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Thread: Xeon E5 performance charts |
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Thread Status: Active Total posts in this thread: 45
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
OldChap, you rebel, how did you go about when you learned what kind of ES and QS are good buys, and which ones to stay away from? Is there an easy to understand rule of thumb a novice like I can follow.
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OldChap
Veteran Cruncher UK Joined: Jun 5, 2009 Post Count: 978 Status: Offline Project Badges: 
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I didn't
---------------------------------------- I started with the basic premise that due to having to run on all sorts and ages of hardware and in doing so running separate instances rather than multi-threading, WCG does not in all likelyhood use the more exotic features of these processors. I figured that the only features needed by WCG would likely be those needed to run the testing phase of getting these processors to market. ....or put another way I gambled   |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
So you're saying most of the ES and QS on eBay actually work good enough to do the job here on WCG?
Have you ever read anywhere about someone buying an ES or a QS and discovering it didn't work at all, or did work but so poorly that the lower price of it was offset, meaning a retail would have had a better performance per dollar? |
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Byteball_730a2960
Senior Cruncher Joined: Oct 29, 2010 Post Count: 318 Status: Offline Project Badges: 
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Mumak - Thanks! I didn't really want to know the specifics, but more which of the codes B1/C1 etc is closest to production spec...
If that is sensitive too, then no worries. |
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Mumak
Senior Cruncher Joined: Dec 7, 2012 Post Count: 477 Status: Offline Project Badges:
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For the Sandy Bridge-server family:
----------------------------------------A0 = ES0 A1 = ES1 B0/L0 = ES2 B1 = ES2 (improved) C0 = QS (Qual Samples) M0/C1 = QS or Pre-Production M1/C2 = QS or Production  [Edit 1 times, last edit by Mumak at Mar 13, 2015 7:29:40 AM] |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Mumak, thank you!!!
Now this will become little easier to navigate. Do Ivy and Haswell EP have same engineering codes? |
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Byteball_730a2960
Senior Cruncher Joined: Oct 29, 2010 Post Count: 318 Status: Offline Project Badges:
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Mumak... Thank you. That's really helpful knowledge should I or others venture into engineering samples.
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Byteball_730a2960
Senior Cruncher Joined: Oct 29, 2010 Post Count: 318 Status: Offline Project Badges:
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Mumak... Thank you. That's really helpful knowledge should I or others venture into engineering samples.
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Mumak
Senior Cruncher Joined: Dec 7, 2012 Post Count: 477 Status: Offline Project Badges:
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No, as I already said each generation/model uses different steppings and mid-stages can be different as well.
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Mumak
Senior Cruncher Joined: Dec 7, 2012 Post Count: 477 Status: Offline Project Badges:
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Ivy-server:
----------------------------------------A0 = ES0 B1/B2/B3/R0/R1/L1/L2 = ES2 C0/C1/S0/S1/M0/M1 = QS or Production D1 = QS or Production (EX-only) Haswell-server: A0 = ES0/ES1 B0 = ES1/ES2 L0 = ES2 R2/M0/M1/C0/C1 = QS or Production D0 = QS or Production (EX-only) Note, that this applies to SERVER parts only (-E/EN/EP/EP 4S/EX), not desktop, mobile etc. Also note that the first letter in stepping here usually denotes how much cores are there (Low/Mid/High core count). The second number is the intermediate spin, so i.e. in "C0/C1/S0/S1/M0/M1", Cx is for the High count, Sx for low, x0/x1 is the 'spin' within the given stage (i.e. C0 was the first spin of QS, C1 the 2nd spin/production). Don't expect here any general rules - it's a development/testing process and everything depends on results/quality. These samples are released as needed for such purposes. [Edit 2 times, last edit by Mumak at Mar 13, 2015 9:25:05 AM] |
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