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E8600 OC help.

post #1 of 4
Thread Starter 
Just a quick question if I can. I have an old rig running a E8600 oc'd to 4ghz with 4gig of DDR2 running at it's stock 800ghz with timings of 5-4-4-15.

Every time I try to clock the cpu over the 4ghz (regardless of vcore) the system will not post, all I get is a overclock failed screen. Now is this because the ram just doesn't want to budge over it's factory speed of 800 all of a sudden or is it somthing I'm doing wrong?

Thanks for any replies

Oh, mobo is a Rampage formula x48
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post #2 of 4
Most good DDR2 800 will do 420-ish before it craps out. It's possible yours may be touchy. If so, bumping the RAM voltage one notch should give you a bit more room.

MOST likely, your NB needs more voltage. My X48 board needs 1.42V to get 400 stable and hits a wall around 435.
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post #3 of 4
Why does your signature list your CPU at 4.33GHz and the RAM at 866MHz if it won't go over 4GHz?

I have the same CPU and, for all intents (at least in this case), nearly the same board with a Rampage Formula BIOS on it anyway (version 0701 to be precise). The CPU and board, in all likelihood, aren't going to be the problems. It's probably down to RAM or settings. I have different RAM though, but my RAM is nothing too special, and I'm even running more quantity/modules, so getting yours to play nice should be possible unless it just doesn't do much over 400MHz.

The way to find out is... lower your multiplier to 6x, and start raising the FSB only and see if it'll go higher then. That takes the CPU out of the equation (leaving the RAM and Northbridge/MCH in). Try loosening your timings and/or giving the RAM more voltage. You may need to raise the Northbridge/MCH voltage too.

For what it's worth, I can do 400MHz FSB at ~1.3V, and that's with 8GB/four modules of RAM. I'd say try ~1.4V-1.45V for the Northbridge to ensure it should have plenty for going above 400MHz FSB. I never had to go over 1.4V for the Northbridge, even at 450MHz FSB.

Edit: We even have the same CPU cooler. Had we the same RAM, I could give you my BIOS settings. I'm at 4GHz now, but I did run 4.5GHz before (wasn't totally stable under 1.4V, but it'd still give you plenty to get over 4GHz).
Edited by Princess Garnet - 10/26/11 at 5:20pm
post #4 of 4
Thread Starter 
Yeah that was back in the day. After doing that overclock I put everything back to auto and left the FSB at 400. I felt like a fiddle today and went for the 433 that I got back then. Then this happened and It kinda threw me so I put it down to the ram. But that said I've just got a clock of 4.5ghz to boot. Going to run a few stability tests and see how I get on.

Must of been me playing with something I didn't understand as I set everything back to auto and started again and now have this boot.

Thanks for your replies.
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