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Haswell Overclocking Guide [With Statistics] - Page 646

post #6451 of 19539
Could lower the PIV and Cache Voltage this night. (Attached pic)

Also for people mentioning BF4, not sure if any of you is running Adaptive Voltage, I do, and with BF4 it looks like the game uses AVX / AVX2 instructions since my cpu keeps doing the classic +0.1v for FPU tests.

ixtu-lower-vring-vinput.jpg 400k .jpg file
    
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post #6452 of 19539
Thread Starter 
Quote:
Originally Posted by jak3z View Post

Could lower the PIV and Cache Voltage this night. (Attached pic)

Also for people mentioning BF4, not sure if any of you is running Adaptive Voltage, I do, and with BF4 it looks like the game uses AVX / AVX2 instructions since my cpu keeps doing the classic +0.1v for FPU tests.

ixtu-lower-vring-vinput.jpg 400k .jpg file

Based upon your wording, it seems to me you're saying BF4 uses AVX2 because it bumps your Vcore by +0.1v?

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post #6453 of 19539
Quote:
Originally Posted by Darkwizzie View Post

Based upon your wording, it seems to me you're saying BF4 uses AVX2 because it bumps your Vcore by +0.1v?

At least that's what I think. Since when you make the CPU use the FPU and use AVX instructions by default on adaptive voltage intel bumps +0.1v.
    
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post #6454 of 19539
Thread Starter 
Quote:
Originally Posted by jak3z View Post


At least that's what I think. Since when you make the CPU use the FPU and use AVX instructions by default on adaptive voltage intel bumps +0.1v.

That's very strange... I'd expect no more than say, 0.03 increase in Vcore from set levels. Can anybody else confirm? I know BF3 doesn't do this to me but I don't own BF4.

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post #6455 of 19539
It can explain why BF4 is causing crashes while other stuff like x264 isn't.
post #6456 of 19539
Quote:
Originally Posted by Darkwizzie View Post

That's very strange... I'd expect no more than say, 0.03 increase in Vcore from set levels. Can anybody else confirm? I know BF3 doesn't do this to me but I don't own BF4.
Well, if you run any app that uses AVX the voltage will increase, but if the app uses AVX2 it will increase even more. The average increase is up to a 0.1v using AVX2 instructions.

You can test this with avx2 linpacks (Linpack 11), but beware, it will run way too hot

Also OCCT can run AVX(1) linpacks smile.gif
    
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post #6457 of 19539
Thread Starter 
Quote:
Originally Posted by jak3z View Post


Well, if you run any app that uses AVX the voltage will increase, but if the app uses AVX2 it will increase even more. The average increase is up to a 0.1v using AVX2 instructions.

You can test this with avx2 linpacks (Linpack 11), but beware, it will run way too hot

Also OCCT can run AVX(1) linpacks smile.gif

I know about Linpack. Your suggestions are synthetics. That stuff has been tested and documented. But I have not witnessed a normal application that ups voltage by 0.1v or more under normal conditions.

 

But as I mentioned, screenshots from a few people can verify this.

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CoolingCoolingCoolingCooling
14xEK ACF (Compression Fittings) EK x4 250 (v2) Distilled Water + PT Nuke (Copper Sulphate) 24x140mm Silent Wings 3 
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Windows 10 Pro 64bit Catleap 27 Inch 2560x1440 IPS 60hz Display Coolermaster Storm Trigger (Brown Switches) EVGA P2 1000w 
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post #6458 of 19539
Hi Dark ..listen me please i am nobbie on haswell

I have a gigabyte z87 OC and 4770k

I have try this setting :
vcore 1.350
Vrin 1.910
Vring 1.16
Uncore 35x
Cpu 44x

iBT ..it is a stable
Now i want your opinion , for you this setting are high voltage for 44x ?

How can setting for 45x ( not uncore of course )

Thanks for your answer
Edited by magnifico1 - 12/5/13 at 6:37am
post #6459 of 19539
Yesterday I started to do some overclocking tests on my new system, Gigabyte Z87X UD3H, i5 4670K watercooled with EK Supreme HF block and two rads (240 and 360) powered by one Swiftech MCP35x... and with 3x2GB triple channel GSkill PI Series 1600MHz CL7 (PSC).

Went up to 42x100 @ 1.20v, with 43x100 @ 1.20v got a BSOD error 124 after few minutes stressing the cpu with AIDA64x, from what I've read (about BSOD 142) need more vcore... on these first tests I only change the multiplier and vcore, not yet touched the uncore ratio/voltage, for now is still in stock

On the ram's already got 2400MHz @ 1.80v 9-14-9-32 but with only two ram modules, not yet tested with my 3 PI modules , I think I can lower the timings without increasing the voltage.

The VID of my cpu is 1.133v (batch L315B338 Malaysia). I was reading in a forum that I can lower the vcore after tweaking the VRIN, System Agent, digital/analog IO voltage, etc etc... been looking at F7 BIOS and did not found these settings.


Since my old I7 920 I not do overclock and this new generation is completely different, so thank you for any kind of help or tips to discover the limits of my new system.
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post #6460 of 19539
Z87 is dual channel...You would need either 2 or 4 sticks of memory..
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