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~~~~~IMPORTANT SANDYBRIDGE OC INFO: Voltages & OC Guide!!~~~~~

Think you'll be hard pushed to find a decent cooler that's less than 82mm tall, as nearly all coolers use atleast a 120mm fan...

Might be best to go for something like the corsair H50, if you've got space to mount the radiator?

Why do you have such limited space?
 
Got the need for speed so upped it to 4.6 using the SA and IO settings Davebeast posted and it would not boot Windows lowered it to 4.3 and its running Prime 95 at 1.280v 68C max temp. I expected to achieve at least 4ghz and maybe 4.2 so 4.3 would be rather pleasing.

Do you think I need to manually set a high vcore to hit 4.4 onwards currently its auto voltaging it to 1.280v @ 4.3

EDIT: Gave it 1.35 in BIOS LLC Extreme and it still would not boot Windows (have also tried CPU PLL 1.8) so I am settling for 4.3ghz and will thoroughly test this Prime 95 Small FFT Stable... so basically I think there are chips that can do 4.3 and those that can do 4.6 without setting silly voltages.
 
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Max3 said:
do the asus windows overclocking tools show you all the current settings applied when bios options are on auto?
Click to expand...

Yes they do... the Multiplier needs enabling in the bios, but it will let you enable in windows and re-boot.

I'm finding the Asus windows tool to be excellent. Everything seems to work.

Most of the time I have my machine setup at stock with Auto on all voltages except Ram and then clock when in windows.

For my biggest clocks I have been booting at 5GHz via Bios and then tweaking and setting Multi to 51, 52, 53 and 54. This way you can sometimes catch it before a BSOD.

Bear in mind with Sandy booting the system at high Multi is easy because it's not until windows loads that it applies the Turbo. So overclocking in the bios is a right pain because you only know if your successful when you try and open windows.

I used the Asus tool to just step up the voltages and Multi, in most cases catching failures because an open application crashed or in prime one core failed, rather than a full BSOD

Great set of tools
 
SimonMaltby said:
I used the Asus tool to just step up the voltages and Multi, in most cases catching failures because an open application crashed or in prime one core failed, rather than a full BSOD

Great set of tools
Click to expand...

Interesting. Either mine has allowed me to make changes and then maybe BSOD or the whole PC has frozen completely.
 
R.C.Anderson said:
Think you'll be hard pushed to find a decent cooler that's less than 82mm tall, as nearly all coolers use atleast a 120mm fan...

Might be best to go for something like the corsair H50, if you've got space to mount the radiator?

Why do you have such limited space?
Click to expand...

It is to fit into a Silverstone SG04-F, which I have only just bought.

As I am not looking at any sort of serious overclocking, I might even just stick with the stock cooler, as the CPU will definately be a 2500K. I am going to wait for the prices to drop a bit first though!

Just a bit of 'turbo' would be good however... say up to about 4.0! ;)
 
Todge said:
Interesting. Either mine has allowed me to make changes and then maybe BSOD or the whole PC has frozen completely.
Click to expand...


Actually, just used it again from a stock Bios base point i.e. Vcore at AUTO
and 1.3v in the Asus software gives 1.4 in cpuZ, 1.36 in software was 1.45 so take care. When you manually set a vcore on the Bios it then seems to work correctly in the software.

As I say, just take care... notch it up slowly and then run super-pi or something to see the voltage when turbo clicks in.
 
are you guys on the latest beta bios? I don't seem to have any problems on the stock version at the moment but tempted to flash just to see if helps with ocing a bit.

meh my 4.4ghz with 1.3v isn't quite prime blend stable yet D:
 
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Max3 said:
are you guys on the latest beta bios? I don't seem to have any problems on the stock version at the moment but tempted to flash just to see if helps with ocing a bit.

meh my 4.4ghz with 1.3v isn't quite prime blend stable yet D:
Click to expand...

Unless you are looking for a serious overclock of over 4.8GHz the beta bios is not required... in my opinion at least.
 
Max3 said:
are you guys on the latest beta bios? I don't seem to have any problems on the stock version at the moment but tempted to flash just to see if helps with ocing a bit.
Click to expand...

Mine and someone else i have been talking to both hit a brick wall on the 2500k at 4.5ghz on the Asus boards. Only when i got the 1053 bios could i get past.
 
It's possible to flash backwards right? :o

I noticed someone on XS mentioned that their 2600k degraded with 1.5 volts going through it in within 2 days.
 
5GHz 1 Hour Prime 95 stable... which for me means stable.

Sandy2600K@5GHz-Prime-2.jpg


Just took a little more vCore and PLL voltage.

That's me well happy.
 
Max3 said:
:o are you prime stable now?
Click to expand...

Ran prime for 8 hours overnight 4.6ghz @ 1.38v. If I change nothing it fails at 4.7 so something somewhere needs a bump.

Max temps on all 4 cores were 59, 69, 71, 68. I have some MX-4 and some more Akasa Venoms on the way. I'm sure i put too much TIM on to get a range like that.

According to the Asus tools the CPU alone is currently using 99.99w (this is clearly maxing out at 99.99 which is just ridiculous) and at idle is using 20.25w.

And that 99w is a lie.
3.7 ghz @ 1.38v is reading 90.00w
3.8 ghz @ 1.38v is reading 92.00w
3.9 ghz @ 1.38v is reading 94.38w
4.0 ghz @ 1.38v is reading 95.75w
4.1 ghz @ 1.38v is reading 99.99w
Everything above is reading 99.99w!

The 3.7-3.9 wattage levels are also fluctuating a little. Once you hit 99.99 though it just stays there.

Hopefully Asus release an update which actually shows the wattage past 99.99!
 
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