A hardware question

Discussion of anything and everything relating to chess playing software and machines.

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CRoberson
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Re: A hardware question

Post by CRoberson »

DomLeste wrote:Is the Telepath engine a private engine i dont seem to recall?
Yes.
bob
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Re: A hardware question

Post by bob »

OK, so the 270 runs at 600K. Which is about 1/10th the speed of my core-2 duo (2.0ghz) when running two threads. And about 1/50th the speed of a good 8-core i7 box. 600K is not very fast, compares reasonably against my old PIV 2.8ghz box, maybe 1/3 to 1/4 the speed of that.

I will add that the numbers on the top of that chart seem slow. I see 20M-24M on our older 2.33ghz box, and a core i7 at 2.33 was in the 24M range also. Those 4+ghz overclockers should be seeing faster speeds I would think.
Last edited by bob on Sat Dec 19, 2009 8:20 pm, edited 1 time in total.
Dayffd
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Re: A hardware question

Post by Dayffd »

CRoberson wrote:
DomLeste wrote:Is the Telepath engine a private engine i dont seem to recall?
Yes.
Is there any chance Telepath will become public?
David S.
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M ANSARI
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Re: A hardware question

Post by M ANSARI »

I am not so sure this test is accurate for different platforms. I know for a fact that my Octa at 4 Ghz is much stronger than my i7 running 4 cores at 4 Ghz and even at 4.2 Ghz. For chess there is an advantage to having more cores, at least in my experience. Now if you manage to get those Nehalems to run at 4.6 or 4.8 Ghz then the performance might reach and even overtake the 8 core.
bob
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Re: A hardware question

Post by bob »

M ANSARI wrote:I am not so sure this test is accurate for different platforms. I know for a fact that my Octa at 4 Ghz is much stronger than my i7 running 4 cores at 4 Ghz and even at 4.2 Ghz. For chess there is an advantage to having more cores, at least in my experience. Now if you manage to get those Nehalems to run at 4.6 or 4.8 Ghz then the performance might reach and even overtake the 8 core.
The issue is always NPS. If you compare NPS for an equal number of cores, whether it is a single-chip multiple-core or a multiple-chip single-core, the faster NPS will always be better. The i7 was the fastest NPS numbers I have seen to date. The issue here is that there is something beyond unusual about this particular i7 box. Never seen a "numa" i7. Seen lots of numa AMD boxes, but not an i7. I ran on an dual-chip quad-core i7 (8 cores total) for a couple of months and did not see any scaling issues with respect to NPS whatsoever. This machine being discussed is just dying beyond 4 threads, which is different than anything I have seen previously, for any configuration even NUMA amd boxes which scale perfectly thru 8 cores.