Intel Core i5 & i7 Sandy Bridge Overclocking and Feedback

[antuk15]

Mine, Intel Burn Test with the AVX patch is more stressful then Prime95 on blend.

Intel Burn Test AVX >> Prime95 Blend >> Intel Burn Test

Load Vcore was 1.426

 

[cadaveca]

Let se some 16GB Linpack loving!





Takes bloody forever for 20 passes with that much ram. Was doing that a couple of weeks ago.

I assum you are using a hpase cooler, Antuk15?

 

[antuk15]

I assum you are using a hpase cooler, Antuk15?

You assume correctly

 

[cadaveca]

How do you like the Geil Corsa ram? Running 1866 MHz?

 

[antuk15]

How do you like the Geil Corsa ram? Running 1866 MHz?

Stock it's 1333 9-9-9-24-1T @ 1.5v

Currently it's running at 1600 9-9-9-24-1T @ 1.5v

It POSTS when I set it to 1866 and starts to load windows but then restarts, Might make it with extra voltage but 1.65v will kill my CPU..

But love it, Nice quality RAM and it's a very nice colour in real life

 

[Chicken Patty]

Now its time to check what's the highest multi your CPU can boot at cp lol

Soon I will.

That's under water, right? Looks really good. However, at 4.5ghz, you should be able to lower vcore some.

I will try that shortly and this is on air.

Coretemp? Sorry I had too.
Here is mine on air:

http://img.techpowerup.org/111124/phanteks-3fan-oc-load.png

Great temps on air man.

 

[MilkyWay]

Just got a second hand 2500k "new" doubt its new but gonna get a motherboard tomorrow in the Black Friday sales, i like that more UK e-tailers are getting into the Black Friday thing.

LOL gonna see if i can run it on my xiggy cooler just now and get a new cooler next month. If i have to run stock or only a mild oc thats okay. So yeah ill be jumping ship.

 

[Chicken Patty]

Decided to start clocking my RAM up a bit. This is the first jump in speed, going to let it crunch for a bit and see how it does. If stable, I'll go at it again.

One question, what did you guys say my CPU PLL voltage should be at? I have mine now at 1.77v I believe.

 

[cadaveca]

1.8v is stock for CPU PLL. If you enable PLL Overvolt, you can drop that 1.8v down to 1.65v or so.

 

[Chicken Patty]

1.8v is stock for CPU PLL. If you enable PLL Overvolt, you can drop that 1.8v down to 1.65v or so.

Enable or Disable? I disabled it, I think you told me to in a previous post, not sure.

 

[cadaveca]

Yeah, leave it off unless you need it to get more multipliers.

If you do enable to get more multipliers, then you can drop CPU PLL 1.8v down to 1.65v....

 

[Chicken Patty]

Yeah, leave it off unless you need it to get more multipliers.

If you do enable to get more multipliers, then you can drop CPU PLL 1.8v down to 1.65v....

Okay, right now I have it off and it's at 1.77v. I will try to drop more and see how it goes.

 

[DOM]

I run my pll 1.55v and everything auto/stock its not like old gen Intel where it up's the volts like crazy

And that's with any multi I use I use 1.55v up to x55 and x56 has to be on the ss

 

[Chicken Patty]

I run my pll 1.55v and everything auto/stock its not like old gen Intel where it up's the volts like crazy

And that's with any multi I use I use 1.55v up to x55 and x56 has to be on the ss

I'm definitely going to start lowering it. Thanks guys. Keep you posted.

 

[cadaveca]

Just a note that DOM must be using PLL overvotlage to get 55x. Play with it a bit, and you'll see what I mean. Each CPU is going to vary a bit by what the lower acceptable end is.

IF you use Turbo to OC, and have too low of a PLL, you'll find that when multis change, you crash. This is only an issue when using Turbo, and I recommend turbo, so al lmy recommendations are based on that. Not many others are using Turbo to OC, for whatever reason.

That's where the difference comes in to approaches, and why there seems to be conflicting ideas...it depends on which of the like 6 ways to OC you choose...

 

[Darkleoco]

Might restart my Overclocking efforts in the next half hour to try and make Skyrim run smoothly with all my mods X_X.

Gonna try and get 4.5 Ghz stable at 1.39v hopefully after 1.37v failed on me :/

Edit: I am using turbo to OC any tips for maintaining stability at lower voltages cadaveca?

 

[DOM]

no i oc it in the bios and for some reason this mb doesnt like for the PLL overvotlage to be
enabled only on auto, but on the P67A-UD5-B3 i had to turn it on

but on both i used 1.55v but idk if it helps any with having it lower, i just heard it did

cuz on my 24/7 i use to test them now its whatever, cuz if im doing something i dont wanna lose i run it stock

but just saw your review on this mb how do you get the igpu to work off the hdmi

 

[cadaveca]

but just saw your review on this mb how do you get the igpu to work off the hdmi

Set the iGPU to enabled, and put it as first display device to boot. Err...at least, that should be all, been a while since I looked at the BIOS for that one.

 

[Darkleoco]

Just had Windows freeze after 4 minutes on Prime95 @ 4.5 Ghz 1.39v and memory at 1600 :/ should I be concerned or do I just need tweaking?

 

[cadaveca]

hard to say. try running linpack, 1024MB for CPU-only, max mem for ram/controller/CPU. If it fails linpack 1024MB look at cpu. If it doesn't, but fails max avail mem linpack, look at controller volts or ram.

 

[Darkleoco]

hard to say. try running linpack, 1024MB for CPU-only, max mem for ram/controller/CPU. If it fails linpack 1024MB look at cpu. If it doesn't, but fails max avail mem linpack, look at controller volts or ram.

Should I re-overclock and do that or do it on stock settings? I've had Prime95 running on stock since it did that and it has been fine.

I also have a BIOS update available, should I run install that first before trying any new overclocks? I also would prefer not to clear the CMOS due to the "Thermal Armor" on my motherboard, should I expect any issues from that if the new BIOS install correctly?

 

[Chicken Patty]

What the safest we can bump the DRAM voltage up to on this platform? 1.55v?

 

[Darkleoco]

What the safest we can bump the DRAM voltage up to on this platform? 1.55v?

Just use the voltage your RAM is specified for, I use 1.65v for mine since my Hyper X is supposed to run at 1.65v.

 

[LAN_deRf_HA]

I've been running 1.65v pll with pll overvoltage off. I'm guessing it doesn't matter until you clock up higher.

 

[cadaveca]

I've been running 1.65v pll with pll overvoltage off. I'm guessing it doesn't matter until you clock up higher.

Depends on CPU..maybe board too..I cannot get lower than 1.725v.