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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 677

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Poll expired: Oct 17, 2012  
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post #6761 of 9534
Quote:
Originally Posted by Jpmboy View Post

what cpu? MB?

fill out rig builder and add it to your signature block. Leaving turbo on auto at high OC is not the best way to go about this.

i5 2500k, asrock extreme 3 gen 3

what value should i put in turbo besides auto?
post #6762 of 9534
Quote:
Originally Posted by Lucky 23 View Post

You should overclock using Offset and turbo. There is no reason to overclock using fixed mode with these CPU's.
Like I said, it's just a silly newbie hunch, but I do believe disabling the C states killed my previous SSD. The BSOD wouldn't go away no matter what I tried.
Quote:
The other C states can cause you to BSOD when idling when using Offset VCore mode. You shouldn't BSOD if you are using Fixed VCore mode.
I also have this to consider. So I would rather keep them enabled if only for my own peace of mind.

I would simply like to know if anyone has attained a stable 4.4 GHz OC from an i7 3770k on an ASRock EXTREME4 Z77 on fixed CPU core voltage, and what voltage that was, so as to get a general idea of what I should expect from mine.
post #6763 of 9534
Quote:
Originally Posted by toughboy View Post

i5 2500k, asrock extreme 3 gen 3

what value should i put in turbo besides auto?

what multiplier are you running at 1.4V? 48? 49? (iPLL enabled at >46?)

anyway - take 125mV of that 130 and put it in turbo, leave 5mV in offset (speedstep enabled) and test stability. remember the (legal) limit for a 2500K is 1.52V.
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post #6764 of 9534
I don't have a graphics card atm, using the Intel HD Graphics 4000 (i5 3570k).
Is it safe to follow this guide before I get a graphics card? I plan to get a gtx 760 later this year when I get the money.

Thanks in advance,
Phez
post #6765 of 9534
Quote:
Originally Posted by Jpmboy View Post

what multiplier are you running at 1.4V? 48? 49? (iPLL enabled at >46?)

anyway - take 125mV of that 130 and put it in turbo, leave 5mV in offset (speedstep enabled) and test stability. remember the (legal) limit for a 2500K is 1.52V.

@ 1.4 v im running at 48 multiplier, nope pll is disabled.

ok sir copy, gonna try it now smile.gif
post #6766 of 9534
Quote:
Originally Posted by toughboy View Post

@ 1.4 v im running at 48 multiplier, nope pll is disabled.

ok sir copy, gonna try it now smile.gif

internal Phase Lock Loop on can really help windows deal with itself during boot up. offset is in 5mV increments, turbo is in 4mV steps... get as close as possible to your stable 48 vcore you had before. With the E3G3 (well, at least mine) sometimes turbo just can't add the top end mV, so back that off 10mV and add the necessary amount to offset, but keep offset as low as possible.

you want to define turbo (and not use auto) so you put a limit on the value. However, I ran my 2700K like that for months until switching to turbo-OC mode.
Edited by Jpmboy - 7/14/13 at 5:30am
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post #6767 of 9534
Quote:
Originally Posted by Jpmboy View Post

Probing the limits of the CPU with fixed or offset is not different. for offset, set 5 or 10mV in offset, spreadspectrum off, all sleep state except C1E off, set the multiplier in the low 40s and increase turbo mV until stable. Up the multiplier, increase turbo (usually 30-40mV per 100 MHz) and repeat until you hit a limit (cooling solution, vcore max - a personal thing smile.gif, or the chip just can't do more. in the end, the load vcore for either method will be very close to each other.

Fixed OC must idle higher than load to compensate for vdroop unless you turn off vdroop with high LLC compensation which is not good to do in the long term since the chip will not handle the VID overshoot during load transients. Frankly, I can't understand why folks continue to use fixed voltage with the exception of extreme OC.... you're taking a chip with speedstep, SVID (DVID) and a host of other technologies and sending it back 3-4 generations.

The advantage of using offset is that the chip is not idling with load vcvore (+ vdroop) voltage potential on the die (although the current is v low). A couple of Intel engineers debated the long term effects of a steady, but high vcore vs a low but transiently high (=same as fixed) vcore during load scenarios and there was no clear answer on the impact on chip lifetime. ONe clear answer was that defeating vdroop 100% is not advised in either scenario.
Aware of and understand all that. I wasn't arguing that fixed is better, only that people newer to oc'ing (imo) would find it easier to start with fixed voltage. Also (imo) it is easier to find your offset voltatage after finding a baseline. But, then again, I don't waste hours of my time ONLY using prime to test a oc either. It's simply the last test.
    
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post #6768 of 9534
Quote:
Originally Posted by hotrod717 View Post

Aware of and understand all that. I wasn't arguing that fixed is better, only that people newer to oc'ing (imo) would find it easier to start with fixed voltage. Also (imo) it is easier to find your offset voltatage after finding a baseline. But, then again, I don't waste hours of my time ONLY using prime to test a oc either. It's simply the last test.

i agree regarding the p95 stuff. 1h for me has never led to instability down the road. On some production boxes, yeah... 12h may be necessary.

1h prime - 90% ram
IBT with 90% ram for 5-10 cycles
maybe a little OCCT

never had a kernel crash after that.. had a few gpu driver crashes, but that's a different story.
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post #6769 of 9534
Quote:
Originally Posted by Jpmboy View Post

i agree regarding the p95 stuff. 1h for me has never led to instability down the road. On some production boxes, yeah... 12h may be necessary.

1h prime - 90% ram
IBT with 90% ram for 5-10 cycles
maybe a little OCCT

never had a kernel crash after that.. had a few gpu driver crashes, but that's a different story.
I usually do
1- cinebench r11.5
2- 10 passes IBT with 90% ram usage
3- Crysis 3 and Farcry 3 for a few hours
4 - Prime95

I haven't had prime fail yet after following the previous steps. I can boot and run cinebench and still fail IBT but usually only require one voltage bump to get an oc to pass. I've only had 1 pass IBT and get a cracsh in 1 of those games I mentioned. I had LLC on High instead of Ultra.
I just don't get people exclusively telling people to run Prime and wasting all those hours to get failures.
If I find that voltage seems unusually high or have consistent problems, I look at my other hardware and run some mem tests and gpu benches.
    
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post #6770 of 9534
Quote:
Originally Posted by hotrod717 View Post

Aware of and understand all that. I wasn't arguing that fixed is better, only that people newer to oc'ing (imo) would find it easier to start with fixed voltage. Also (imo) it is easier to find your offset voltatage after finding a baseline. But, then again, I don't waste hours of my time ONLY using prime to test a oc either. It's simply the last test.

It's not really easier, Offset + Turbo is just a better way to set up your voltages. Plus it kind of a waste of time to OC using fixed because you will have to redo you OC when switching to Offset + turbo. Sure you can get your full load close to what it was at fixed but it would be better to retest. As I was saying fixed is a thing of the past with the old 775 sockets. There is no reason to run fixed any more when you can run Offset + Turbo and have the CPU downclock to a 16 multi at 1.00v or less.
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