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i7 4700k temps too high at stock speeds during IBT - about ready to give up - Page 2

post #11 of 29
Thread Starter 
Hi all,

Sorry for the long time between posts - I was sent out of state for work on somewhat short notice. But I'm back and wanted to try and finish this project this weekend if possible.

I've been working on my OC - right now I'm trying to find a stable setup for 4.2 GHz. Once I do that, I may try for 4.4 Ghz. I never really expected to go much past that and so far given my results, 4.4 Ghz may be a stretch anyways.

The issue I'm having is, I'm not sure where to start . I'm putting in what I think are high numbers for a 4.2GHz OC, but as soon as I start Prime 95 (thanks again to unclewebb for pointing me to the updater version for Haswell), my computer crashes. Right now my numbers are at:

CPU Ratio (all core): 42
CPU Cache Ratio: 39
Vcore Override Voltage: 1.200
CPU Cache Override Voltage: 1.200
CPU Input Fixed Voltage: 2.000V

If I have missed any values, please let me know and I'll post them immediately. Is something way off here, or is it just a matter of playing with the numbers a little bit at a time? I don't mean to sound like I am looking for someone to do the work for me, but as someone completely new to OC, I'm just looking for something to reference as a starting point. I came up with these values based on a number of sites I read - I upped the CPU Input Fixed Voltage to the higher end of the spectrum (it was originally 1.9V, but that crashed immediately too).

Thank you so much for your help!

UPDATE: Just an update to my above post. I tried using the Turbo Boost feature to push up the speed to 4.2 GHz just to see what starting numbers my motherboard would give me. I've been running Prime95 but my CPU doesn't seem to go past 3.7 GHz according to CPU-Z. Is there something I'm missing? I would have thought with the Turbo Boost, it would go all the way up to 4.2 GHz when stress testing?
Edited by yensid - 3/8/14 at 1:50pm
post #12 of 29
Quote:
Originally Posted by unclewebb View Post

Prime95 v28.1
http://hardforum.com/showthread.php?t=1781170

The author released a special version that gives the newer Haswell CPUs a good work out. smile.gif

28.5 is current and better.



If you want to see if you are stable. take this version and use a custom setting of min and max ftt size = 1344. For some reason this is a magic number. This test doesn't drive the temperature too high and it is a good test for stability. Run it for about 2 hours.

http://mersenneforum.org/showthread.php?t=19182

Make sure you have SUM inputs and round-off checking enabled in the Advanced tab.

Do not run small ftt with this version of p95 unless you are prepared for temperatures to reach the thermal limit.
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post #13 of 29
Quote:
Originally Posted by yensid View Post

Hi all,

Sorry for the long time between posts - I was sent out of state for work on somewhat short notice. But I'm back and wanted to try and finish this project this weekend if possible.

I've been working on my OC - right now I'm trying to find a stable setup for 4.2 GHz. Once I do that, I may try for 4.4 Ghz. I never really expected to go much past that and so far given my results, 4.4 Ghz may be a stretch anyways.

The issue I'm having is, I'm not sure where to start . I'm putting in what I think are high numbers for a 4.2GHz OC, but as soon as I start Prime 95 (thanks again to unclewebb for pointing me to the updater version for Haswell), my computer crashes. Right now my numbers are at:

CPU Ratio (all core): 42
CPU Cache Ratio: 39
Vcore Override Voltage: 1.200
CPU Cache Override Voltage: 1.200
CPU Input Fixed Voltage: 2.000V

If I have missed any values, please let me know and I'll post them immediately. Is something way off here, or is it just a matter of playing with the numbers a little bit at a time? I don't mean to sound like I am looking for someone to do the work for me, but as someone completely new to OC, I'm just looking for something to reference as a starting point. I came up with these values based on a number of sites I read - I upped the CPU Input Fixed Voltage to the higher end of the spectrum (it was originally 1.9V, but that crashed immediately too).

Thank you so much for your help!

UPDATE: Just an update to my above post. I tried using the Turbo Boost feature to push up the speed to 4.2 GHz just to see what starting numbers my motherboard would give me. I've been running Prime95 but my CPU doesn't seem to go past 3.7 GHz according to CPU-Z. Is there something I'm missing? I would have thought with the Turbo Boost, it would go all the way up to 4.2 GHz when stress testing?

I have to have Overide voltage to 1.184-1.2 to be stable with the latest prime95. You should be able to lower your cache voltage to something like 1.17 or 1.18. Also, you want the CPU input to be 0.4-0.6 higher than the core voltage (under load). 2.0 is too high.

You may be able to decrease the core voltage if you increase your VCSSA by 0.05-.0.08 offest.

Good luck.
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post #14 of 29
Thread Starter 
Thanks for the info GeneO. I was using the Blend Test on Prime95 - maybe that was the cause of some of my issues.

I'll also try values you suggested and report back here shortly. I sincerely appreciate your help.
post #15 of 29
Thread Starter 
Quote:
Originally Posted by GeneO View Post

I have to have Overide voltage to 1.184-1.2 to be stable with the latest prime95. You should be able to lower your cache voltage to something like 1.17 or 1.18. Also, you want the CPU input to be 0.4-0.6 higher than the core voltage (under load). 2.0 is too high.

You may be able to decrease the core voltage if you increase your VCSSA by 0.05-.0.08 offest.

Good luck.

Ok I tried the high-end of the ranges you suggested and ran Prime95 using a custom setting of min and max ftt size = 1344 and made sure sum-inputs and round-off checking were enabled in the Advanced tab; I did not change any other settings. However, I BSOD as soon as I started the test. Would bringing the values down help, or does this mean I need to go higher. Here are my values right now:

CPU All Core Ratio 42
CPU Cache Ratio 39
Vcore override voltage 1.200
Vcore voltage additional offset 0.010
CPU Cache Override Voltage 1.180
CPU Cache Voltage Offset 0.010
Fixed Voltage 1.800
post #16 of 29
Was it a 0x124 BSOD? That usually means you need more vcore. But as I mentioned, Adding a .05-.08 offset to VCSSA might help for a 0x124.
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post #17 of 29
some folks get good results setting cache ratio to 35 (stock) and cache voltage to auto. may need higher vcore than 1.2 to get past 4.2GHz. Try bumping that up by .05 volts?

did you read any haswell specific overclocking tutorials?
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post #18 of 29
Thread Starter 
@GeneO - sorry what is the VCSSA? I don't see that in my UEFI options. Is it the System Agent Voltage Offset (currently set to auto)?

@Make Out - ok i'll try those numbers. I did read a number of guides on haswell cpu overclocking but I found a few of them to have conflicting information and others were a bit over my head TBH.
post #19 of 29
Quote:
Originally Posted by yensid View Post

@GeneO - sorry what is the VCSSA? I don't see that in my UEFI options. Is it the System Agent Voltage Offset (currently set to auto)?

@Make Out - ok i'll try those numbers. I did read a number of guides on haswell cpu overclocking but I found a few of them to have conflicting information and others were a bit over my head TBH.

VCCSA is System Agent.
post #20 of 29
Thread Starter 
@Geneo

With the below settings, I am still getting BSOD (0x00000124). I have all the settings set at the highest for the ranges you provided. Should I continue to add more vcore?

CPU All Core Ratio 42
CPU Cache Ratio 39
Vcore override voltage 1.200
Vcore voltage additional offset 0.010
CPU Cache Override Voltage 1.180
CPU Cache Voltage Offset 0.010
System Agent Offset 0.080
Fixed Voltage 1.800



@Make Out - I will try your #s next.
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