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Haswell Overclocking Guide [With Statistics] - Page 392

post #3911 of 19540
Quote:
Originally Posted by byardz View Post

1.65 in general is bad RAM that couldn't make it to 1.5.

Please, show me some 3000mhz RAM that runs at 1.5v - as opposed to the "unsafe" 1.65v that nearly all High-Performance RAM runs on....
post #3912 of 19540
Thread Starter 
Quote:
Originally Posted by blaze2210 View Post


Please, show me some 3000mhz RAM that runs at 1.5v - as opposed to the "unsafe" 1.65v that nearly all High-Performance RAM runs on....

IF YOU PUT THAT RAM IN YOUR COMPUTER YOUR COMPUTER WILL EXPLODE. :devil: :buttkick: :devil-smi :gunner2: :gunner: :wheee:

 

 

Next question please.

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post #3913 of 19540
Quote:
Originally Posted by Darkwizzie View Post

BTW, how intensive is XTU compared to x264 or 27.9 prime? Is it hotter? Just more intensive? Synthetic?

I've found i can pass x264 but fail XTU. (that was whilst bringing up uncore, core might have been different). Even though XTU bench is AVX and XTU stress reportedly isn't, if it doesn't pass bench (or without major core dropping) it wont pass XTU stress.

As i've mentioned before i run CB for the lowest stability (i.e, make sure it'll actually run something, in no way used for actual stability testing), x264, XTU bench then XTU stress. The benefit of doing it this way in my eyes is from x264 through to XTU stress, you have guide marks (%/time/duration/core drop) all the way to make educated decisions about which tweaks are working and which aren't. From my findings i don't require more voltage to pass bench over stress, the opposite in fact but only marginally. (we're talking maybe .005vcore or .025vrin here on the core, similar with uncore but with SA/IOD tweaks)

I'll need to check with 27.9 but i'm fairly sure it will fail within a couple of hours. It's not something i bother with now as XTU bench uses prime function so if it can pass that it's good enough for me. Certainly 100% rock solid for gaming. Temp wise i can't remember if there was much of a difference between the two, maybe a delta of 5deg, i'd need to check. I'm under water now, XTU hit's mid 60's iirc, ran IBT max/extreme (whatever the top setting is) and hit 73deg which i assume will be similar to 28.1. On air i'd expect not only average temp to be higher but a larger delta between the two.
post #3914 of 19540
Thread Starter 
Quote:
Originally Posted by Doug2507 View Post


I've found i can pass x264 but fail XTU. (that was whilst bringing up uncore, core might have been different). Even though XTU bench is AVX and XTU stress reportedly isn't, if it doesn't pass bench (or without major core dropping) it wont pass XTU stress.

As i've mentioned before i run CB for the lowest stability (i.e, make sure it'll actually run something, in no way used for actual stability testing), x264, XTU bench then XTU stress. The benefit of doing it this way in my eyes is from x264 through to XTU stress, you have guide marks (%/time/duration/core drop) all the way to make educated decisions about which tweaks are working and which aren't. From my findings i don't require more voltage to pass bench over stress, the opposite in fact but only marginally. (we're talking maybe .005vcore or .025vrin here on the core, similar with uncore but with SA/IOD tweaks)

I'll need to check with 27.9 but i'm fairly sure it will fail within a couple of hours. It's not something i bother with now as XTU bench uses prime function so if it can pass that it's good enough for me. Certainly 100% rock solid for gaming. Temp wise i can't remember if there was much of a difference between the two, maybe a delta of 5deg, i'd need to check. I'm under water now, XTU hit's mid 60's iirc, ran IBT max/extreme (whatever the top setting is) and hit 73deg which i assume will be similar to 28.1. On air i'd expect not only average temp to be higher but a larger delta between the two.

Maybe one of those days I"ll get off my lazy bum and actually try XTU... maybe only to get hit in  the face with 95C+ temps, lol.

 

BTW, your post count is now a Bsod code. Congrats! :cheers:

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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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post #3915 of 19540
Argh! Anything but 101!!biggrin.gif

IIRC there wasn't a massive difference between x264 and XTU with regards to temp.
post #3916 of 19540
If anyone wants a good and fun stress test... go play Far Cry 3. Just got this game and damn, it crashes my cpu oc faster than PRIME 95!!!
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post #3917 of 19540
Hi, I’ve discovered that BCLK frequency fluctuates during x264 bench. HWinfo, CPUz and AIDA64 doesn’t show it but ASUS AI Suite does. The frequency has been changing from 98MHz to 102MHz, so it’s a 4MHz range wide though. IMHO it can cause system instability and lead to bsods due more voltage demands at higher BCLK. Let’s calculate,
98 x 46 = 4508MHZ but 102 x 46 = 4692MHz ! lol
I need as high as 1.375v set in bios for 4.6GHz to pass x264 bench (ASUS AI suite shows 1.408 at 102MHz BCLK and 1.392 at 100MHz BCLK during benching). I think that is a bios bug or something. My bios is 1405. During benching on prime or OCCT I’ve noticed that there’s no such fluctuation of BCLK and I can pass with lower voltage 1.35v.
Can someone either confirm or deny my assumption.
biggrin.gif
Edited by darkadi - 10/16/13 at 12:19pm
post #3918 of 19540
Read this:

"G.Skill Trident X Series 8GB (2 x 4GB) DDR3-2400 Memory operating voltage of 1.65V exceeds the Intel Haswell CPU recommended maximum of 1.5V+5% (1.575V). This memory module may run at a reduced clock rate to meet the 1.5V voltage recommendation, or may require running at a voltage greater than the Intel recommended maximum

What a lot of OCN'ers don't realize is that 1.65v was the 1.575 of the 1st gen i7s.

1.575v is the do not exceed cap of the 2nd gens and up.

Good luck burning your IMCs thumb.gif
post #3919 of 19540
Does intel recomended any overclocking at all?
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post #3920 of 19540
Quote:
Originally Posted by otl View Post

Does intel recomended any overclocking at all?

Yeah.



These voltages are pretty loose, they allow for a lot of freedom.

The RAM is one area that people are overlooking, the IMCs on the chips were not meant to handle 1.65v and they are damaging their IMCs slowly (if their PC is on 24/7 then rapidly).

IMC Degradation FTW!
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