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Old 2008-10-08, 06:07   #1
IronBits
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Default Intel Core i7 Extreme Edition Q965 on the X58 MOBO

I'm sure most of you will find something useful in the performance arena, if not just for the hardware and benchmarks.

http://ocxtreme.org/forumenus/showthread.php?t=3978
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Old 2008-11-04, 17:48   #2
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Nehalem performance benchmarks are starting to appear, but I don't see any for prime95 iteration times based on fft size. Has anyone seen any? Please post links.
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Old 2008-11-04, 20:30   #3
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Quote:
Originally Posted by IronBits View Post
I'm sure most of you will find something useful in the performance arena, if not just for the hardware and benchmarks.

http://ocxtreme.org/forumenus/showthread.php?t=3978
That link is members only...

Jacob
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Old 2008-11-04, 20:41   #4
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That link used to work without being a member. I guess they changed it. Anyway, it was just nice photos.

Anyway, now that Intel lifted the ban on releasing Nehalem performance benchmarks I'm interested in seeing some for prime95 iteration times.
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Old 2008-11-05, 05:54   #5
ixfd64
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Quote:
Originally Posted by stars10250 View Post
That link used to work without being a member. I guess they changed it. Anyway, it was just nice photos.
The staff probably moved the thread to a moderator-only forum. I registered an account and still can't view the thread.
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Old 2008-11-06, 16:57   #6
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There's some interesting information about hyperthreading in these benchmarks:
http://hoth
ardware.com/Articles/Intel-Core-i7-Processors-Nehalem-and-X58-Have-Arrived/?page=10

That was the benchmarks that slashdot listed. I usually prefer tomshardware, but they've fragment this benchmark list into 37 pages:
http://www.tomshardware.com/reviews/...em,2057-1.html

I noticed that it lists 7 new commands for the new SSE4.2:
CRC32, PCMPESTRI, PCMPESTRM, PCMPISTRI, PCMPISTRM, PCMPGTQ, and POPCNT.

I found many i7 benchmarks that uses prime95 for stress testing. Here's one with pictures of prime95 running:
http://www.overclockers.com.au/artic...?id=726776&P=7


I did find 24.14 benchmark results for Nehalem from a few weeks ago on the Team Prime Rib forums:
http://episteme.arstechnica.com/eve/...006039731/p/15
Their results show less than a 5% improvement over core 2.



Last fiddled with by uigrad on 2008-11-06 at 16:58
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Old 2008-11-06, 18:06   #7
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This last one is exactly what I was looking for. "Best time for 2560K FFT length: 48.980 ms" doesn't sound like much of an improvement over core 2 (noted as <5%). Of course, i7 may allow all 4 cores to achieve this, whereas people reported about 3 cores-worth of performance with the memory bottleneck on their core 2 quads. Still, if this is representative of i7 performance, it might be better to buy 2 older systems than one new i7. I look forward to more numbers like this. Many people are posting stress tests with prime95 but that doesn't interest me. Thanks much.
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Old 2008-11-07, 01:34   #8
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Frustrating that so many are running P95 on the i7, but only for stress testing their overclock and not posting any benchmarks!
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Old 2008-11-07, 04:21   #9
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http://www.theinquirer.net/gb/inquir...t-inqpressions
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Old 2008-11-07, 12:28   #10
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Benchmarking one Prime95 to extrapolate to multiple Prime95s may be tricky.

A single session of Prime95 will have two major advantages,
mostly uncontested memory bandwith and CPU core overclock.

The i7/nahalem has dynamic speed technology/turbo mode
where inactive cores get very low/no power and the remaining cores
get more power and an overclock.
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Old 2008-11-11, 00:39   #11
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I find myself in the unfamiliar position of wanting to overclock the i7 and I don't even own one yet. I'm new to overclocking, but from what I've read it seems like the thing to do if one is stuck paying so much (~$350) for a motherboard.

Am I crazy to begin my journey into overclocking on such a new system? There are already lots of instructions online from reputable sources, and the process appears to be well-described. It would be a shame to smoke a new i7, but I think if I cool it well and go slow I should be ok. We've all got to start somewhere, right?

By the way, good point about the dynamic speed technology/turbo mode for the i7. I suspect most of us wish to fully load all four cores, which is different than running just one core for benchmarks.

Last fiddled with by stars10250 on 2008-11-11 at 00:43
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