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Overclocking problem with 2600

post #1 of 13
Thread Starter 
i have oc my 2600 to 4.2ghz but when i run prime 95 it only show 3.9ghz


but when i run Xs bench it go 4170mhz so what can be the problem i want stable 4.2ghz all the time

post #2 of 13
How did you overclock? I'm gonna assume you just upped the turbo?

There's a great Sandy Bridge guide in the Intel Cpu section, you should check it out.
post #3 of 13
You're only getting 3.9GHz because you don't have a K-Chip, which has an unlocked multiplier. Intel limits the non-K chips to 3.9GHz.
post #4 of 13
Thread Starter 
Quote:
Originally Posted by Z13 View Post
You're only getting 3.9GHz because you don't have a K-Chip, which has an unlocked multiplier. Intel limits the non-K chips to 3.9GHz.
but check my XS bench it is 4150mhz n even in bios it show 4200MHz
post #5 of 13
it self throttles.
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post #6 of 13
Non k fail bro. Shoulda dropped the extra $30 for the 2600k.
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post #7 of 13
Quote:
Originally Posted by Badboyz View Post
but check my XS bench it is 4150mhz n even in bios it show 4200MHz
Yeah, that always happens. Intel limits the chip itself to 3.9GHz, but the BIOS can still think it's above that.
post #8 of 13
ooooh that sucks....
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post #9 of 13
Its the core turbo's. 1 core is 42x, 2 cores is 41x, 3 cores is 40x, and 4 cores loaded is 39x.

You are flat out limited there. No way around it. You can up your BCLK slightly (maybe lucky and hit 105Mhz BCLK x 39, that gives you 4095MHz (or basically 4.1GHz). That's seriously as far as you're going to get.

Should've dropped the extra $30 for the K model.
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post #10 of 13
Quote:
Originally Posted by pioneerisloud View Post
Its the core turbo's. 1 core is 42x, 2 cores is 41x, 3 cores is 40x, and 4 cores loaded is 39x.

You are flat out limited there. No way around it. You can up your BCLK slightly (maybe lucky and hit 105Mhz BCLK x 39, that gives you 4095MHz (or basically 4.1GHz). That's seriously as far as you're going to get.

Should've dropped the extra $30 for the K model.
This^

Or, if your board is little bit special (as some are), you might be able to get a 107MHz BCLK (@ 39x = 4173MHz). If only one core is under load and you can get to 107MHz, it'll be @ 42x multi, so 4494MHz. You could always sell it on eBay as an overclocked i7, get some money back, and buy a 2600K.
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