Help Me Overclock my C2D E6550 !

ringwraith

Junior Member
Aug 17, 2007
3
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Hi! This is my first post at AnandTech and am quite stunned by the quality of advice and information present on the forums.

Great work by all the regulars!

Now, I have an Intel C2D E6550 which is on a MSI p6n SLi V2 board (nVidia 650i based). I use 1 GB (2x 512MB) 667 Mhz RAM. My timings are pretty loose, like 5-5-5-xx (cant remember the last). I am on stock cooling.

I attempted to OC my CPU from the BIOS and got it to hit 2.63 Ghz by just increasing the FSB. I had disabled C1E and D.O.T as well as EIST. I dint even have to touch the voltages. This was brought about by an FSB of 375. (375x7 = 2632). My mobo automatically selects a divider for my ram and currently it is running at the stock 333Mhz by a 9:8 divider for CPU:RAM.

However, this is where the problem creeps in. If i try to increase the FSB to even 376 Mhz, my system refuses to POST. I tried upping the voltages for everything but nothing seemed to help and no matter what I do, I cant get it over 2.63 Ghz. I'm sure that this chip can take more than 375 Mhz (from what i've read) and my mobo can definetly handle more than 375 Mhz (which i confirmed by lowering the multi of my CPU). Apart from this my temps never exceed 45 load. (45 as of TAT by the way) . So i'm sure that there is scope for overclocking this chip to atleast 3Ghz , So can i please get some advice on how i can accomplish this?????
 

zach0624

Senior member
Jul 13, 2007
535
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did you check to make sure your rig was orthos stable for several hours before testing? also did your rig post at a lower multi at the same freq that it didn't post at? if not your mobo might have an fsb hole so skip ahead about 20mhz and try there.
 

SerpentRoyal

Banned
May 20, 2007
3,517
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RAM is good up to about 333MHz FSB. You may need to overclock the RAM or lock-in the memory speed at 333MHz.

7x multi chips will usually require very fast RAM to reach the full potential of the CPU.
 

bryanW1995

Lifer
May 22, 2007
11,144
32
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can't you run the ram asynchronously on a 650i? try that to eliminate ram as a potential problem. 650i's are not very good oc boards so don't expect the world out of this one.
 

ringwraith

Junior Member
Aug 17, 2007
3
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Hey! Thanks for the advice, but I just bought this system and am not willing to sell my RAM off already!

I tried using the asychronous overclocking feature, but it dint help.....