ASUS P8P67 Pro/Evo/Deluxe OC discussion thread

[MaStA]

How do you stress test these CPU's, because I find it very difficult to see what is stable other than just doing regular work.

Prime95 has always seemed to do the best for me.

[Sam_oslo]

If you guys are trying to get power savings with offset mode, then a low-volt 24/7 setup can be a good alternative.
Many of these chips should do 4-4.2GHz with low-volt, easily. Anything over 4Ghz would be overkill for most desktop application, anyways.

I've used manual-vCore and Load Line Calibration = Ultra High for @4.2GHz 1.19v/1.17v (Idle/load) and tested it with 30-min Prime.
I used it for several days without any problem, and then increased the vCore by one notch, just to keep it on the sure side, and call it stable, until it crashes on me.

The best part, it idles with 1.19-1.20v with little heat and power-usage, and all fans are running quietly at ~60%, etc ..
I've under-volted almost everything else too, including the PCH=1.0v to reduce leakage. Here it it's:

[coolhandluke41]

If you guys are trying to get power savings with offset mode, then a low-volt 24/7 setup can be a good alternative.
Many of these chips should do 4-4.2GHz with low-volt, easily. Anything over 4Ghz would be overkill for most desktop application, anyways.

I've used manual-vCore and Load Line Calibration = Ultra High for @4.2GHz 1.19v/1.17v (Idle/load) and tested it with 30-min Prime.
I used it for several days without any problem, and then increased the vCore by one notch, just to keep it on the sure side, and call it stable, until it crashes on me.

The best part, it idles with 1.19-1.20v with little heat and power-usage, and all fans are running quietly at ~60%, etc ..
I've under-volted almost everything else too, including the PCH=1.0v to reduce leakage. Here it it's:

I was just going back through some of the posts ...
First of all you don't need LLC @Ultra HIgh for 4.2 at all
30-min Prime is a joke to call it " stable" no offense (min 1~6 hours in my opinion)
Here is the thing that caught my eye:
CPUPLL-- this voltage is for the internal clock generator for CPU (PLL that gives you 3.4GHZ for 26K and 5.2+ overclocked) maximum 1.89/1.8 stock if you want to save power and keep temps down ,you could turn it down to 1.71v

VCCIO aka QPI/VTT--processor power for I/O (voltage for integrated mem controller and PCI-E controller) maximum is 1.05+/- 3% no need in changing this 1.08 is absolutely safe and you can go as high as 1.2 for 24/7 it will allow you to OC you RAM but increase your temps

VCCSA aka System Agent Voltage--Maximum 0.971v ,minimum 0.879v
Stock 0.925v System Agent should Not be touched ,it is supposed to be fixed, it powers a lot of things that the VCC does not power like Power Control
Most of this is based on recommendations on overclocking the K series which i found very helpful and written by Sin
http://www.overclock.net/intel-gener...uide-p67a.html

here is the update on the offset ( i thing i found my 24/7 )
@ 4.7 Medium LLC @110% +.06 (minimum load 1.024v / max 1.368v)
stable under P95 blend (1hour+) and Linx (20 passes ),no BSOD so far ,will give few more days @"light load" and probably run P95 overnight
@ 4.7 High LLC@120% +.045 (min as low as 1.000v / Max 1.400 )

will report back if something pop out
P.S I guess i found choice #4
crank that bad boy up ,it's K series for crying out loud !

[ZenEffect]

i like 1253 better than 1204. i flashed back to 1253 using ezflash

[Sam_oslo]

I was just going back through some of the posts ...
First of all you don't need LLC @Ultra HIgh for 4.2 at all
30-min Prime is a joke to call it " stable" no offense (min 1~6 hours in my opinion)
Here is the thing that caught my eye:
CPUPLL-- this voltage is for the internal clock generator for CPU (PLL that gives you 3.4GHZ for 26K and 5.2+ overclocked) maximum 1.89/1.8 stock if you want to save power and keep temps down ,you could turn it down to 1.71v

VCCIO aka QPI/VTT--processor power for I/O (voltage for integrated mem controller and PCI-E controller) maximum is 1.05+/- 3% no need in changing this 1.08 is absolutely safe and you can go as high as 1.2 for 24/7 it will allow you to OC you RAM but increase your temps

VCCSA aka System Agent Voltage--Maximum 0.971v ,minimum 0.879v
Stock 0.925v System Agent should Not be touched ,it is supposed to be fixed, it powers a lot of things that the VCC does not power like Power Control
Most of this is based on recommendations on overclocking the K series which i found very helpful and written by Sin
http://www.overclock.net/intel-gener...uide-p67a.html

here is the update on the offset ( i thing i found my 24/7 )
@ 4.7 Medium LLC @110% +.06 (minimum load 1.024v / max 1.368v)
stable under P95 blend (1hour+) and Linx (20 passes ),no BSOD so far ,will give few more days @"light load" and probably run P95 overnight
@ 4.7 High LLC@120% +.045 (min as low as 1.000v / Max 1.400 )

will report back if something pop out
P.S I guess i found choice #4
crank that bad boy up ,it's K series for crying out loud !

Well, 30-min documented Prime is better that 30-hours stable-claims. We haven't seen any documentation about your "stable"-claims yet. I don't care how you test your setup, it's up to you. People test in different ways, but if you are going to call it a "joke", then you better do it right yourself.

I'm still experimenting with different setup, and those 30-min Prime-runs are just for getting a "feeling" how it's reacting to changes. None of them are final yet, and there is no need to have a 8-hour prime testing for each little change. This is a new platform and I would rather do my own experiments than following those rules and suggestions from the link you have provided. Now lets see if you can do it right yourself.

[Darkstormz]

Well, 30-min documented Prime is better that 30-hours stable-claims. We haven't seen any documentation about your "stable"-claims yet. I don't care how you test your setup, it's up to you. People test in different ways, but if you are going to call it a "joke", then you better do it right yourself.

I'm still experimenting with different setup, and those 30-min Prime-runs are just for getting a "feeling" how it's reacting to changes. None of them are final yet, and there is no need to have a 8-hour prime testing each little change. Now lets see if you can do it right yourself.

I have to agree with you. 30-min is just an indication. If you settle for 24/7 settings then you can start running 8-hour prime just to be on the safe side

[coolhandluke41]

Well, 30-min documented Prime is better that 30-hours stable-claims. We haven't seen any documentation about your "stable"-claims yet. I don't care how you test your setup, it's up to you. People test in different ways, but if you are going to call it a "joke", then you better do it right yourself.

I'm still experimenting with different setup, and those 30-min Prime-runs are just for getting a "feeling" how it's reacting to changes. None of them are final yet, and there is no need to have a 8-hour prime testing for each little change. This is a new platform and I would rather do my own experiments than following those rules and suggestions from the link you have provided. Now lets see if you can do it right yourself.

sure buddy ,here ;
http://www.overclock.net/intel-cpus/...z-club-64.html
here is linx;


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[Gr1mR34p3r]

Prime95 has always seemed to do the best for me.

I guess Prime95 is better than IntelBurnTest for SB.

IBT 20x maximum stable, but BSOD in idle/light loads
46x100 -0.015V LLC Auto (1.240-1.256V)
48x100 +0.045V LLC Auto (1.296-1.328V)

Prime95 Blend
46x100 +0.030V LLC Auto (1.288-1.304V) - 8 hours stable
48x100 +0.090V LLC Auto (1.344-1.360V) - temperatures rise 83°+ to test it for long time, but +0.080 failed in 9min and +0.085 was stable for 15min+, so +0.090 should be stable

What I was trying to say in my previous post. If load is stable but idle or off-idle is not increase the offset voltage. If the final load voltage is considerably more then necessary drop down to the next lower LLC level. Doing this may require bumping offset even more to bring the loaded voltage back to where stability is. This won't have a large effect on idle voltages because they increase considerably less then the loaded values per offset step.

Have to try with higher LLC myself, Auto is like Regular on Offset and Ultra High on Manual vcore, so High for starters.

[MaStA]

I guess Prime95 is better than IntelBurnTest for SB.

IBT 20x maximum stable, but BSOD in idle/light loads
46x100 -0.015V LLC Auto (1.240-1.256V)
48x100 +0.045V LLC Auto (1.296-1.328V)

Prime95 Blend
46x100 +0.030V LLC Auto (1.288-1.304V) - 8 hours stable
48x100 +0.090V LLC Auto (1.344-1.360V) - temperatures rise 83°+ to test it for long time, but +0.080 failed in 9min and +0.085 was stable for 15min+, so +0.090 should be stable


Have to try with lower LLC myself, because these voltages are 0.02-0.03V higher than necessary. Auto is like Ultra High, so High for starters.

What type of cooling are you using to reach 83C+ at only 1.36v? I am using a Cooler Master Hyper 212+ with an added fan to pull and at that voltage I only reach like ~61C. It is a cheap cooler as well...I bought mine at Microcenter a few months back for $16.99