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Haswell Overclocking Guide [With Statistics] - Page 289

post #2881 of 19539
Any practical programs right now that run AVX2? Or is LinX AVX2 the absolute maximum Haswell could ever be pushed. Curious because I have good temps and am stable there so should I just live with that?
post #2882 of 19539
Hey guys! I am currently stucked at 4.4ghz. I am running at 1.28 core and 1.850 (i dont remember the name of this voltage, haha. Its 1.8 at stock though).

How can i get stable at 4.5?
post #2883 of 19539
Quote:
Originally Posted by mcnico63 View Post

Hi all, my name is mcnico63 and I sorry for my bad english... I'm french.

I play with Haswell 4770k 2 month ago and I like it smile.gif

I testing many motherboard : ASUS Maximus VI Hero / Gryphon / Z87X-OC / Z87-G45 and now I test over GIGABYTE MB.

My 4770K is good I think : 4.6GHz 1.18v Vcore but after is complicated... 1.24v for 4.7GHz, 1.32v for 4.8GHz and 1.40v for 4.9GHz boot but many BSOD ( 101 )

I always left the cover ratio at least 35 regardless of the CPU frequency, I have not found better performance by increasing the ratio.

My memory are G.skill TridentX 2 x 4GB 2666MHz 2800MHz which take without changing

I'm looking for advice hope lower Vcore to 4.7 or 4.8

In advance thank you to all.

Try setting VRIN LLC to max or near maximum level, and set VRIN like - 1.75vrin at 1.22vcore. 1.85 vrin at 1.3 vcore. GL
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post #2884 of 19539
Quote:
Originally Posted by wy2sl0 View Post

Any practical programs right now that run AVX2? Or is LinX AVX2 the absolute maximum Haswell could ever be pushed. Curious because I have good temps and am stable there so should I just live with that?

Linpack is a synthetic use of avx2. It blows up power usage waaaaaaaay high (i saw 115w at 4ghz 1.1v with fast RAM)

x264 uses avx2 to accelerate encoding, but it's a real world use of it, not synthetic. I need like 1.3v to reach the same power draw and temperatures that linpack gives at 1.1v.
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post #2885 of 19539
Quote:
Originally Posted by Cyro999 View Post

Try setting VRIN LLC to max or near maximum level, and set VRIN like - 1.75vrin at 1.22vcore. 1.85 vrin at 1.3 vcore. GL

Thank you, it's true that I find it hard to manage VCCIN? I did not know what to put.

I was 1.90 to 1.42 Vcore

On my Z87X-OC I spent the LLC on TURBO is the voltage droop is not checked multimeter smile.gif

Thank you for your advice, I test tonight on the way.
post #2886 of 19539
Quote:
Originally Posted by userman122 View Post

Hey guys! I am currently stucked at 4.4ghz. I am running at 1.28 core and 1.850 (i dont remember the name of this voltage, haha. Its 1.8 at stock though).

How can i get stable at 4.5?

You probably need more Vcore - many chips need 1.3+ to run 4.5. What are your other settings? Particularly for cache/uncore.
post #2887 of 19539
Quote:
Originally Posted by Doug2507 View Post

If it's running 1.3v@47 ask what voltage it was STABLE at with x48 as it might not scale so well. 1.3v for x47 isn't anything special from what i can gather. I'd be more interested in the voltage used as you can easily de-lid/water cool etc etc to drop the temps.

1.3v for 47x in non-AVX scenarios is probably close to average. 1.3v in AVX scenarios would be pretty outstanding. That guy's chip will probably need 1.37v to be stable at 48x.

There's still a big voltage difference between "runs a benchmark" and "doesn't crash after hours of actual use." Be very careful about buying that chip, and make sure you know whether that voltage is good for AVX or not. I can derp around with SuperPI at 49x with 1.35v, but I crash non-AVX stress tests within seconds even after increasing voltage to 1.41v.
post #2888 of 19539
Hello,

Do you think it's normal to have to increase the Vcore to 0.03V with high frequency RAM 2666MHz CL11?

With RAM @ 800MHz: 4.7 to 1.23V rockstable
With RAM @ 1333MHz: 4.7 to 1.26V rockstable

post #2889 of 19539
What're you testing with? Higher RAM frequency increases load on the CPU in stuff like Linpack, because it allows for significantly more calculations to be done per second
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post #2890 of 19539
Quote:
Originally Posted by steven88 View Post

Hey guys, how reputable are the following synthetic stress testers?

- AIDA64
- Prime 95 27.9
- Prime 95 28.1
- Intel Burn Test latest

Is AIDA64 any good at catching bad OCs? Last I heard it was "certified" for Haswell, but it wasn't any good at catching bad OCs. For example, folks would go 12+ hours of AIDA64 but fail within 15 minutes of BF3....something like that.

Completely normal. That's why we start out ocing with xmp off
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