Originally Posted by Horsemama1956
My first 540 was like that. Took way too much voltage to get 4Ghz. Turns out it wasn't even stable at stock soon I returned it and got another one that works like the rest in the thread. 1.26 for 4Ghz, and 1.3125 for 4.4(I'm pretty sure).
Just get a new one and say it crashes randomly in prime at stock settings.
No, to be fair it does run at stock which is what I paid for, I'd feel like a dick if I returned a working CPU.
I'm definitely tempted to just ignore the max safe voltage as given by intel and run at 4.6 until it craps out though!
Edit: Reckon I'll go to 1.5V just so I can get as close to 4.5 as I can, if I get 4.5 and it runs that long-term then I'd be very happy with the chip's performance overall.
As for tips for getting to 5, you want to follow Miah's guide
and go up nice and slowly.
1.5 is as high as I'd go if I were trying for long-term stability.
Based on your voltage for 4.5, it really wouldn't be worth it to push over 1.5V through the chip to get a 10% increase in clockspeed.
Some people might say that that's too high, I'm not the one to ask because it took almost 1.7V to get my chip to run 220x23 and I still did that.
If you're aiming to be stable and have a worry-free overclock I'd stay below 80C in LinX as well because running temperatures can help to degrade a chip a lot faster than voltage alone.
Skip the first page of the guide except the disclaimer, overclocking can cause damage to hardware and you do it at your own risk.
Also, while I pushed nearly 1.7V through my chip, I did it because I was still getting higher clocks out of it.
If you ran your chip at 1.7 on air or water you'd likely get no more out of it than at far less voltage and it could do serious damage to your chip, I'm just saying this as the amount of voltage I put through it didn't seem safe to me at the time and I only did it as I was determined to get 5 even if it killed my chip.
If you're not prepared to buy a new CPU and potentially get a worse one then don't go anywhere near 1.7.
Sorry about the long warning but I don't want you to kill your chip by thinking I ran 1.7 and that means you can too, I suspect that the fact that my chip needs more voltage might help its ability to survive at higher voltages.Edited by Mike-IRL - 6/16/11 at 6:44pm