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Haswell Overclocking Guide [With Statistics] - Page 1076

post #10751 of 19580
Quote:
Originally Posted by GeneO View Post

@Jack re the 0,.1V boost. I don't know, can't explain it. I am at bios 1302 on Hero.

I tried a couple of things I thought might affect it. Disabled SVID, turned current limit from 110% to 120%. Didn't see any difference, I get a boost at .016-.02V with 4.2 GHz @ 1.2V.

I may try it later with the 4.3 GHz @ 1.25V.

Maybe it is a total power thing and I'm not hitting it.

You just caused me to go to the Asus website and check for the "new 1302" BIOS haha. tongue.gif
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post #10752 of 19580
LOL, I don't think they go up by 1. I meant 1301. The last BIOS I had on my Sandy Z68 was, I think, 1302.

I just tried 4.3GHz. I get 1.232 non-AVX load, 1.248, AVX2, so same difference: 0.016V, but I am not pushing it.
post #10753 of 19580
I tested the power thing too. I ran P95 V28.3 small FFT for a little bit (temps into the 90s - I am air cooled). It did go a little higher, to a boost of .032. (1.264 V ), but according to AI Suite, the wattage was 136W,
post #10754 of 19580
Quote:
Originally Posted by GeneO View Post

I tested the power thing too. I ran P95 V28.3 small FFT for a little bit (temps into the 90s - I am air cooled). It did go a little higher, to a boost of .032. (1.264 V ), but according to AI Suite, the wattage was 136W,

I am also on a Hero running 1.280v VID (manual voltage setting) and 45x core. Under load with x264 my Vcore is going to 1.312v (+.032v over VID).
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post #10755 of 19580
Not sure that is quite the same thing. The difference I was talking about was vcore under non-AVX load (not vid) vs. vcore under AVX load. But I think it amounts to about the same thing.

Regards
post #10756 of 19580
Quote:
Originally Posted by Cyro999 View Post

Average is ~4.5@1.3. There was no mass-gathered info for ivy bridge, but there's no reason to believe that HW cpu's clock significantly worse volt for volt when cooled properly and oc'd with basic education, i think.

Having seen a lot of both.. I get the impression that if haswell is worse, it's only slightly (at the higher end, like 100mhz) and also that a lot of people who oc'd ivy bridge with a few clicks have trouble and report bad oc's running avx2 linpack ALL OVER THE INTERNET

I'm just going by the consensus on this thread compared to the success on the other threads dedicated to Sandy Bridge. I can't get my Haswell over 4.4 no matter what I do with it and I see others having difficulty. I can get 5.0 on my Sandy Bridge with my only problem being cooling (I still use an old H50). I settled for a nice conservative 4.6 setup while it seems my Haswell sweats to get to 4.4.

Maybe they aren't worse, and I just got a very poor CPU. But I figured, just like all other electronics, that there would be an improvement over previous generations.
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post #10757 of 19580
Quote:
Originally Posted by JJFIVEOH View Post

I'm just going by the consensus on this thread compared to the success on the other threads dedicated to Sandy Bridge. I can't get my Haswell over 4.4 no matter what I do with it and I see others having difficulty. I can get 5.0 on my Sandy Bridge with my only problem being cooling (I still use an old H50). I settled for a nice conservative 4.6 setup while it seems my Haswell sweats to get to 4.4.

Maybe they aren't worse, and I just got a very poor CPU. But I figured, just like all other electronics, that there would be an improvement over previous generations.

Yea, if you have a good sandy bridge and a bad Haswell.. there's very little gain, mostly in niche applications.

I can clock 4.7 if i want to and was upgrading from an i7 950 @3.8ghz, so i got a solid >20% frequency upgrade as well as >30% ipc in x264 for example which was a really big upgrade, but 5ghz sandy bridge to haswell is icky at best. Average chip though can clock to 4.6 on air (@~1.36?), especially i5 which is cooler
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post #10758 of 19580
Quote:
Originally Posted by JJFIVEOH View Post

I'm just going by the consensus on this thread compared to the success on the other threads dedicated to Sandy Bridge. I can't get my Haswell over 4.4 no matter what I do with it and I see others having difficulty. I can get 5.0 on my Sandy Bridge with my only problem being cooling (I still use an old H50). I settled for a nice conservative 4.6 setup while it seems my Haswell sweats to get to 4.4.

Maybe they aren't worse, and I just got a very poor CPU. But I figured, just like all other electronics, that there would be an improvement over previous generations.

I think if Intel's goal and focus was on increasing max clock speed then we would see a steady increase. However sadly for us overclockers it's not. Intel's focus is now on power efficiency (at stock spec'd speed) while gaining just enough IPC performance per clock to say they are actually doing something in that regard.
Edited by Tmfs - 3/5/14 at 7:26pm
post #10759 of 19580
The difference in a bad clocking 4670k and a decent clocking one is actually very small in performance. From 4.3ghz to 4.6ghz is only 9%.

While a benchmark will certainly exploit the difference. There is really not any situation where that gap is going to make a difference.
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post #10760 of 19580
Quote:
Originally Posted by Wirerat View Post

The difference in a bad clocking 4670k and a decent clocking one is actually very small in performance. From 4.3ghz to 4.6ghz is only 9%.

While a benchmark will certainly exploit the difference. There is really not any situation where that gap is going to make a difference.

Except the challenge biggrin.gif
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