X5670 vs X5690

neiliohep

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Jan 2, 2015
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My issue has to do with overclocking.
I currently have a Xeon X5670, my buddy who lives far away from me is willing to mail me his X5690 for a cheap price (i would then sell my X5670 at a profit)
Over all the base performance difference is not huge but large enough for me consider the upgrade...assuming it IS an upgrade after being OC's.
The passmark rating for the X5670 is about 8200 1350 single threaded and the x5690 is 9200 with 1500 single threaded (identical in multi and single threaded performance to the fx-8350).
That being said the X5690 is clocked at 3.47 ghz stock and 2.95ghz for the X5670, here is my dilemma.

I overclocked my X5670 to exactly 3.47 to match the baseclock of the X5690, however at the same clock speed yielded HIGHER performance for the X5670 which came in at 9600 on passmark CPU benchmark. Am I right in feeling that the X5670 should not be performing BETTER than the 5690 at the same clock speed? I'm wondering if this will affect over all over clocked performance, the X5690 will be OC'd to 4.3ghz permanently (same as my X5670 right now), but I'm actually nervous now that the X5690 will not yield better results and I am not convinced that the X5690 would give me a higher stable OC because it has a higher TDP.

Anyone have experience with both of these chips?
 
Solution
It is possible and likely the X5690 could have a higher stable OC, yes. IIRC the dies are tested to go a little over-spec to qualify for a certain model.

It is also possible that the increased TDP is representing the higher clock rate over the lesser model at stock voltages, but it may still have room to push even further above that. Only one way to be absolutely sure, and at this point, you really aren't facing a loss of performance.

Saberus

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They're both Westmere EP, which means they are identical dies. As the production of a particular die continues, there tends to be fewer defects, and sometimes chips are down-clocked to meet the demands. It is very possible that is what happened with your X5670. The X5690's ability to OC is unknown, but if you are getting identical or even slightly lower scores without even overclocking, then you're trading off for what could be extended lifespan of your equipment, if that even matters to you.
 

neiliohep

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So you are saying that my X5670 could very well be an X5690 that was downclocked and had X5670 stamped on the front lol??. I was expecting the X5670 to give me less performance at the same clock speed. As for lifespan I am not to worried, 4.3ghz is not the highest stable OC that I have achieved (4.6ghz is) and it's water cooled, I see no reason that the CPU would conk out earlier because of it, voltage doesn't seem to go above 1.35 (just using XMP profile) so it SHOULD be good lol. I wonder though, would the X5690 be better binned (and thus possibly lower temps and better stability) than the X5670 or would they be the exact same as both were ultra high end Xeons with the same architecture?
 

Saberus

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It is possible and likely the X5690 could have a higher stable OC, yes. IIRC the dies are tested to go a little over-spec to qualify for a certain model.

It is also possible that the increased TDP is representing the higher clock rate over the lesser model at stock voltages, but it may still have room to push even further above that. Only one way to be absolutely sure, and at this point, you really aren't facing a loss of performance.
 
Solution

neiliohep

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Hmmm, alrighty then, I guess ill just get it from him and throw it in... O.C the crap out of it and hope for the best lol You're right I can't really lose in this situation lol