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need some tips for overclocking my i3 540

post #1 of 12
Thread Starter 
hi, im just after some really simple tips about overclocking my i3 540. ive looked at alot of the guides but they just dont explain it in enough detail. i would also rather keep away from touching ANY voltages, if anyone can give me a hand it would be much appreciated
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post #2 of 12
Without touching voltages the only thing you can do is increase the bclk, then short stress, increas bclk again, short stress again, and repeat until your stress test fails. When it fails, back down a little on bclk and run a long stress test to check stability.

Are you leaving voltages on Auto or are you going to at least set them manually? If you leave them on Auto, then it's quite possible the board will add more volts than needed for a specific OC, which will increase temps.
Edited by MattNo5ss - 12/23/10 at 5:23pm
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post #3 of 12
Thread Starter 
i was planning to leave them at auto, or if i can look up the what stocks are i can set it manually. playing with voltages really worry me, thats why id rather not touch them
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post #4 of 12
Intel's specs on vcore is up to 1.4v. The difference in Vtt and vDIMM shouldn't be greater than 0.5v. Vtt and vcore are the voltages for bclk stability and overall CPU speed, respectively.

Messing with voltages isn't that bad. Pick something below 1.4v for vcore and Vtt, then set your RAM to its rated voltage probably 1.65v and you'll be good to go. If temps are too high, then reduce vcore some.
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post #5 of 12
Thread Starter 
Quote:
Originally Posted by MattNo5ss View Post
Intel's specs on vcore is up to 1.4v. The difference in Vtt and vDIMM shouldn't be greater than 0.5v. Vtt and vcore are the voltages for bclk stability and overall CPU speed, respectively.

Messing with voltages isn't that bad. Pick something below 1.4v for vcore and Vtt, then set your RAM to its rated voltage probably 1.65v and you'll be good to go. If temps are too high, then reduce vcore some.


im not sure ive seen a vtt option in my bios, im sure their all there but i think they have them called other things. the only i i recognise is the QPI option. but i'll go back and have another look
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post #6 of 12
QPI is another name for it, so that's Vtt.

Have you seen MIAHALLEN's i3/i5/i7 OC Guide? It's very detailed, and worth a read.
Edited by MattNo5ss - 12/23/10 at 6:00pm
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post #7 of 12
Thread Starter 
ok so after looking in the bios, these are my voltage options...

CPU voltage
IMC voltage
CPU PLL voltage

and also the QPI doesnt have a voltage setting its options are in MHz.

yes i looked at that guide, but was still unsure lol
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post #8 of 12
CPU voltage is the vcore and IMC voltage is the Vtt for your board then. The QPI setting you're seeing is the QPI ratio calculating the QPI speed.

It would be nice is the names of BIOS settings were standardized across boards, there would be a lot less confusion.
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post #9 of 12
Thread Starter 
Quote:
Originally Posted by MattNo5ss View Post
CPU voltage is the vcore and IMC voltage is the Vtt for your board then. The QPI setting you're seeing is the QPI ratio calculating the QPI speed.

It would be nice is the names of BIOS settings were standardized across boards, there would be a lot less confusion.
agree with you there bud lol would be much sompler if they were all the same.

ok so now i know what voltages are what, what would be the first course of action, raising voltages first or increasing my bclk
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post #10 of 12
I would try to find out how high your bclk can go first. Set your voltages manually first. Then lower the CPU multiplier to its lowest setting (I think 12). Next is when you start raising the bclk in small increments, booting into the OS, and stress testing. If the test fails, you need to raise Vtt a little, then try again until it passes. Then raise bclk again, and repeat until you get to you highest or desired bclk.

I start out with the vcore and Vtt at 1.25v. When I need to raise Vtt, I do that in 0.025v increments. But you can change this if you want.
Edited by MattNo5ss - 12/23/10 at 6:23pm
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