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Just bought i5 2550k and Gigabyte GA-Z68XP-UD3P - Page 8

post #71 of 117
Quote:
Originally Posted by TheWolf View Post

Quote:
Originally Posted by ApocalyPS3 View Post

Also, I'd like to run a 24/7 OC. Is there any fact sheets on the i5 about safe vcore voltage and other facts like PLL/BLCK and whatnot?

You should manually set the vcore to start with. 1.35v vcore or less is the max I would run for a 24/7 overclock.
If you want to try for max 24/7 OC I would start by manually setting the vcore at 1.30v and see how far that will let you OC stable.
Keeping in mind you will want to keep the temps in or below the 65c range for a 24/7 OC. Well these are my preference.

Your preferences sound kinda low... 1.45v, wouldnt run higher for 24/7. I ran 1.44 @5ghz, max load temps mid 70's
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post #72 of 117
Quote:
Originally Posted by Blizlake View Post

Your preferences sound kinda low... 1.45v, wouldnt run higher for 24/7. I ran 1.44 @5ghz, max load temps mid 70's

Well I found out the hard way that to much voltage causes shorter life and later on you need more vcore to do the same overclock you was once able to do on much less vcore stable.
Just trying to look out for the new at heart of OCing the SB. This 2600K use to do 4.4Ghz all day long on 1.265v folding@home 24/7. Now it needs 1.295v to do the same 4.4 this is after a few hard runs of 1.5 to 1.6v just for benching use. Maybe its just mine but I found they degrade pretty quick once you get on up on the voltage.
Edited by TheWolf - 2/19/12 at 11:40pm
post #73 of 117
Thread Starter 
How to PLL voltages and BLCK affect the outcome of an overclock, and is it ok to increase FSB over 100?
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post #74 of 117
Quote:
Originally Posted by ApocalyPS3 View Post

How to PLL voltages and BLCK affect the outcome of an overclock, and is it ok to increase FSB over 100?

We don't use the word FSB anymore, just BCLK.

Do NOT touch BCLK, a lot of things (SATA and PCIe in particular) is tied to BCLK. Changing BCLK has a chance of data corruption and unstable overclock.
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post #75 of 117
Thread Starter 
Quote:
Originally Posted by trumpet-205 View Post

We don't use the word FSB anymore, just BCLK.
Do NOT touch BCLK, a lot of things (SATA and PCIe in particular) is tied to BCLK. Changing BCLK has a chance of data corruption and unstable overclock.

When I do the "Auto OC" with Gigabyte's software it does increase the BCLK to 108. Should I not do this and just do a manual OC on the cpu? If so, do PLL voltages play any part in anything?? I just see alot of voltage options in the BIOS and since I'm new to Intel I don't know if I should mess with any of those to get better OC results.
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post #76 of 117
The i5-2550K is on sale for $160 at Microcenter today if you go to their facebook page for the coupon. Cheaper than the i5-2500k. Pretty decent deal but sucks with no integrated graphics for quick sync.
    
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post #77 of 117
Quote:
Originally Posted by ApocalyPS3 View Post

Also, I'd like to run a 24/7 OC. Is there any fact sheets on the i5 about safe vcore voltage and other facts like PLL/BLCK and whatnot?

Here is a good Beginners Guide , read over that then take it from there.
After reading the above you will most likely want to jump to this page: http://www.clunk.org.uk/forums/overclocking/39184-p67-sandy-bridge-overclocking-guide-beginners.html#post110904
Bookmark the page or leave open so you can reference back on different things you don't already know.

Edit: Here is the Guide I used back when I first started OCing my SB for the first time: 3 Step Overclocking Guide – Sandy Bridge
Edited by TheWolf - 2/20/12 at 9:28pm
post #78 of 117
Quote:
Originally Posted by TheWolf View Post

Well I found out the hard way that to much voltage causes shorter life and later on you need more vcore to do the same overclock you was once able to do on much less vcore stable.
Just trying to look out for the new at heart of OCing the SB. This 2600K use to do 4.4Ghz all day long on 1.265v folding@home 24/7. Now it needs 1.295v to do the same 4.4 this is after a few hard runs of 1.5 to 1.6v just for benching use. Maybe its just mine but I found they degrade pretty quick once you get on up on the voltage.

was this within the first month or so you bought the processor?? If it was this is normal for everyone. Sandy bridge has a "burn in" process, almost like breaking in an engine, in which more voltages are required to be stable at any given overclock after about a month of use. I'm not sure what is exactly happening but I do know that everyone who overclocks their chip from day one notice the drop, or slight degradation, in which more volts are needed This is a one time deal and it is nothing to worry about. The only people that notice this are the people that overclock right from the get go. My voltage was on auto so the burn in process did not effect stablitly because My bios was able to correct it. I think it was just a coincidence that at the time you were benching your system.
Edited by Stanfiem - 2/20/12 at 9:57pm
post #79 of 117
Thread Starter 
So I have been stepping up voltage and multiplier on this new setup tonight (And drinking some good scotch) and I'm seeing, at least with my chip, that I'm able to run prim95 blend at 4.6 / 1.4v stable but I'm hitting a major wall going to 4.8. I did go up to 1.48v and it still was locking up on prime95 so if anyone has any suggestions on any other tweaks, I think I feel comfortable running at 4.6 / 1.4 and max temp at 61C
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post #80 of 117
Quote:
Originally Posted by ApocalyPS3 View Post

So I have been stepping up voltage and multiplier on this new setup tonight (And drinking some good scotch) and I'm seeing, at least with my chip, that I'm able to run prim95 blend at 4.6 / 1.4v stable but I'm hitting a major wall going to 4.8. I did go up to 1.48v and it still was locking up on prime95 so if anyone has any suggestions on any other tweaks, I think I feel comfortable running at 4.6 / 1.4 and max temp at 61C

try raising your VCCIO (probably QPI/VTT) a bit if this does not help try lowering your cpu pll and then after you have done this try lowring your vcore a bit (cpu pll decrese has been known yield lower vcore)
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