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Haswell Overclocking Guide [With Statistics] - Page 270

post #2691 of 19539
Finally i pushed my i5 to 4,6 GHz(prime95 5hr 8k max temp 88C undelid on air biggrin.gif) ,but i have some questions:
1. Is it normal that when i set 1.25v vcore in the BIOS it is higher when i am in Windows (1.27v max.)
2. Is it safe to run it 24/7 on fixed voltage (and uncore 1.25v also but my BIOS Mark this voltage red redface.gif)
3. 4,4 GHz uncore good for 4,6 GHz core?
Edited by Menphisto - 9/16/13 at 10:32am
post #2692 of 19539
Aaaand...what are the best settings to test stability With prime 95?
post #2693 of 19539
Try encoding a x264 movie with something like Handbrake, someone on this forums told me and not a single BSOD smile.gif
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post #2694 of 19539
Quote:
Originally Posted by minimindy21 View Post

Try encoding a x264 movie with something like Handbrake, someone on this forums told me and not a single BSOD smile.gif

Rendering movies is heavy. I had to reduce the clocks I had been gaming at all summer a couple of weeks ago on my Amd rig to render some bf3 play in Vegas.
post #2695 of 19539
yes rendering a video with handbrake with x264 will tax the CPU and give you best benchmark for stability and worst case for temps I believe you could ever run into.

especially if you set to max compression and and trellis 2 and also 6 reference frames and such these increase the amount of stress added to the CPU.
Edited by rickcooperjr - 9/16/13 at 11:20am
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post #2696 of 19539
Quote:
Originally Posted by skyn3t View Post

I'm running AIDA again 5 hours and still going , I just don't like the offset in this new platform the spike voltage is huge when it need a bit of voltage

from 4.5Ghz @ 1.36v when stress test with AIDA it does jump to 1.488v and keep up there. if I go manual mode voltage never goes above 1.36v at the same core clock 4.5Ghz.

I had try many options on my mobo to keep the spike voltage to 1.36v ot even 1.4 let's say but 1.488v is too much.

Like i posted it here before I do like the offset mode when it keep's my voltage low and my idle at less than 1Ghz for reading is perfect but for everyday i don't like it at all. I thought i was missing something but looks like it is they way it is.

any input to make it more clear would be nice.
thanks for all replay guys.
thumb.gif

Offset and Adaptive modes both automatically apply +AVX voltage of +0.11v. Manual a.k.a. static voltage is the only method that keeps voltage close to where you want it.

Also, I've been playing with Per-Core overclocking, and it seems to have some interesting effects on voltage. First, you have to actually have different multipliers set. Per-core with all multipliers the same does not see this; it is identical to Sync All Cores. For my tests, I used 48x multiplier when 1 & 2 cores are active, and 47x for 3 & 4 cores. In this setup, an adaptive VID of 1.275v in the BIOS yields a load VID of 1.255v. HWmonitor confirmed that voltage was lower simply when I had 48x multipliers on 1 & 2 cores active. Boosting the BIOS VID to 1.3v adaptive brought me back to the 1.275v load VID I wanted. But I'm pretty sure that in per-core overclocking, the +AVX voltage jump is smaller as well- I was at 1.385v, and before it was hitting 1.391v.

In any event, per-core overclocking is cool, this 48x/48x/47x/47x setup has been working without any issues so far.

Quote:
Originally Posted by nossy23 View Post

I need some help here. I got a Asus Z87 Deluxe Mobo with a 4770K CPU. When I leave everything default, and only change the setting for the CPU to 'sync all cores' so that they all would boost to 3.9 Ghz under load, I'm already getting a BSOD in BF3 and F1 2012. CPU does not get too hot. Voltage is 'Adaptive' as per default. I can run OCCT, AID64 Prime etc without problems. But running those games gives me a BSOD 124. No sure what's going on?

I would look into RAM compatibility, some Haswell chips have problems with certain timings and speeds. Sometimes it's even 2nd or 3rd timings causing issues.
Quote:
Originally Posted by Clockwerk View Post

I'm sure this has been asked a thousand times, anybody know a definitive max safe VCCIN? I have seen everywhere from 1.9 to 2.8 when I searched Google. Currently at 2.2, but am having some issues getting stable at 4.8ghz and think I might need more VCCIN since I have gone up .07 vcore from 4.7ghz.

2.0 is the maximum mentioned in some Intel documents. Unless you're on LN2 and over 1.5v, you won't need to break 2v. As far as I know, it always comes down to more vcore or more vcache.
Quote:
Originally Posted by Menphisto View Post

Finally i pushed my i5 to 4,6 GHz(prime95 5hr 8k max temp 88C undelid on air biggrin.gif) ,but i have some questions:
1. Is it normal that when i set 1.25v vcore in the BIOS it is higher when i am in Windows (1.27v max.)
2. Is it safe to run it 24/7 on fixed voltage (and uncore 1.25v also but my BIOS Mark this voltage red redface.gif)
3. 4,4 GHz uncore good for 4,6 GHz core?

Yes, expect voltage in Windows to be higher. 24/7 fixed voltage of 1.25v should be fine as long as you aren't expecting it to last 10-20yrs, but who knows? Your uncore speed is fine, it has little effect as long as you don't underclock it.
post #2697 of 19539
Thanks Womper, The cpu only must have a lifetime of 2 yrs min. biggrin.gif
post #2698 of 19539
Quote:
Originally Posted by Womper View Post

Offset and Adaptive modes both automatically apply +AVX voltage of +0.11v. Manual a.k.a. static voltage is the only method that keeps voltage close to where you want it.

Also, I've been playing with Per-Core overclocking, and it seems to have some interesting effects on voltage. First, you have to actually have different multipliers set. Per-core with all multipliers the same does not see this; it is identical to Sync All Cores. For my tests, I used 48x multiplier when 1 & 2 cores are active, and 47x for 3 & 4 cores. In this setup, an adaptive VID of 1.275v in the BIOS yields a load VID of 1.255v. HWmonitor confirmed that voltage was lower simply when I had 48x multipliers on 1 & 2 cores active. Boosting the BIOS VID to 1.3v adaptive brought me back to the 1.275v load VID I wanted. But I'm pretty sure that in per-core overclocking, the +AVX voltage jump is smaller as well- I was at 1.385v, and before it was hitting 1.391v.
Warning: Spoiler! (Click to show)
In any event, per-core overclocking is cool, this 48x/48x/47x/47x setup has been working without any issues so far.
I would look into RAM compatibility, some Haswell chips have problems with certain timings and speeds. Sometimes it's even 2nd or 3rd timings causing issues.
2.0 is the maximum mentioned in some Intel documents. Unless you're on LN2 and over 1.5v, you won't need to break 2v. As far as I know, it always comes down to more vcore or more vcache.
Yes, expect voltage in Windows to be higher. 24/7 fixed voltage of 1.25v should be fine as long as you aren't expecting it to last 10-20yrs, but who knows? Your uncore speed is fine, it has little effect as long as you don't underclock it.


Nice find i will try that to see what;s going one on my side. by the way i just found something strange too, I wa running bios BIOS 0714 when i tried the offset mode and many other settings there. I had two stable profile manual and offset. but like i said offset has spiked my volt's too high , but after a bios update I ran the adaptive mode and those high spikes are gone at least in adaptive mode. had not tried it back in offset mode after the bios update but i will. I will post some result's.

thanks for sharing the info
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post #2699 of 19539
Quote:
Originally Posted by TANN3R View Post

Hey guys, I've been reading through this guide and it's got some really good info. When I went to adjust things in my Maximus VI BIOS i was not able to adjust settings by entering a value, I could only press plus or minus to cycle through everything. What i ended up doing was just setting my clock speed to 4.2 and letting my Mobo decide on the voltage. Is that okay?

I'm also having trouble finding the uncore and thing like that in my bios.


You on the Maximus VI Formula bandwagon? Annd a Canuck? NICE!

Anyways, I'm not in front of my PC right now but from what I remember in the BIOS you are looking for a Fully Manual Mode (Enabled/Disabled)

You will then get a chance to manually dial in your CPU Core voltage.
Here is a screenie to what you want.


That's what I did. I'm at 1.35v @ x45 multi and RAM XMP @ 2400MHz, rest of the settings on Auto.
Ran OCCT and AIDA 64 both for an hour and passed.


You try the latest 0804 BIOS yet?
Edited by Lesiunta - 9/16/13 at 12:33pm
post #2700 of 19539
Quote:
Originally Posted by wy2sl0 View Post

I think I am doing something wrong? I don't know what though.

Just installed an H100i. On LinX AVX2 my H100i temp doesn't go above 31.5* C, however my core temp is at 85*.

I had the same issues on my Mugen 3 as well before. The heatsink wasn't really THAT hot, but the core temp was ridiculously high. Yes I am delidded BTW.

Nothing wrong, there's just a lot of heat being produced in a small area and it's hard to get that heat away from the cores fast enough. 85C core temps in AVX2 is actually not bad, lots of people spike over 100C in those tests.
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