FSB Wall?

Garyj881

Garyj881

Garyj881

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29 Sep 2006
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West Yorks
Ok my spec is in sig.

Has anyone with the same mobo / cpu combi and got over 3ghz?

I've hit a wall @ 3040mhz (8 x 380), when i start to get near 390+ fsb it goes from extremley unstable to a non boot.

My memory is on a divider so that not the problem and I've had the V-core up to 1.55 with no affect.

I can only assume its my motherboard not liking the 400fsb.
 
Put terrible RAM timings and dividers to ensure the RAM stability.
But what is/are the stable frequency/ies for lower Vcore/s???
If you know some pairs I can help you more. :)
 
mp260767 said:
memory voltage and timings ok ?
Click to expand...

Memory voltage at 2.1v @ 4.4.4.12 (standard timings) and they are actually underclocked at 760mhz.

So i dont think its the memory.

@ MrSeanKon

The V-core was 1.35V stable upto 3040mhz 10rs Orthos.

Sorry bud not sure what you meant about the "know some pairs".
 
Tried adding +0.1v to the NB?

When getting that high of FSB, sometimes adjusting the NB makes it stable. Worth a shot at least.
 
flibby said:
Tried adding +0.1v to the NB?

When getting that high of FSB, sometimes adjusting the NB makes it stable. Worth a shot at least.
Click to expand...

If its the same as mchb then yes.

ive just upped it to 8 x 390 @ 1.35v but cant get it higher im afraid.
 
Can you change multi on that chip? Or locked at 8x? If you can adjust to 7x, try that and using 450FSB in case the hole is around the 390 - 420 ish mark.
 
same problem here with a E6600 ..

everyone always raves about how stable they are at 8x 400 + .. but mine won't even post at 8x410 (1.55Vcore) and over 415 - requires a battery out job to reset the bios !!
 
isnt the motherboard i have the 965 ds3p and its running over 400,what bios do you have loaded and what version of the mobo.
 
mp260767 said:
isnt the motherboard i have the 965 ds3p and its running over 400,what bios do you have loaded and what version of the mobo.
Click to expand...

The mobo is a 3.3 revision with the latest F5 bios.

I tried it on a mulit of 7 x 457 = 3200mhz but my memory divider options left me running at nearly 1000mhz so i had to reset the cmos.

Now im at 8 x 390 = 3120mhz and i think thats my limit, just got to try orthos now.
 
Update, I've ran orthos for 1 hr and Vista became unstable so i upped the v-core to 1.35 which resulted in the load temps going up quite a lot (nearly 10 deg).

So for now it looks like im sticking with 8 x 380 = 3040mhz.

For reference i tried 3000mhz on the x 7 multi and it wouldnt post.

Who knows, i can't complain really for the price and a 90% overclock.
 
Try it with 2 sticks of RAM. 4 sticks is a nightmare for overclocking as the motherboard has to do lots more work. And the GeIL often runs better at lower voltages eg. try 1.9V.
 
WJA96 said:
Try it with 2 sticks of RAM. 4 sticks is a nightmare for overclocking as the motherboard has to do lots more work. And the GeIL often runs better at lower voltages eg. try 1.9V.
Click to expand...

I've only just upgraded to 4gb so i know thats not the problem, and I'm not to sure on lowering the V-dimm but i can try it for now.
 
Garyj881 said:
I've only just upgraded to 4gb so i know thats not the problem, and I'm not to sure on lowering the V-dimm but i can try it for now.
Click to expand...

but is the 4gb 2x2gb or 4x1gb, if its the later take a couple of sticks out and see if it makes any difference as some mobo's dont like 4 sticks.
 
I had similar problems with mine. Had to run my E6600 at 8x425 as 9xanything-over-355 refuses to work. I assume mobo as if it was so much as 1mhz over, it used to recycle and reset the pc.
 
mp260767 said:
saw mention of the temp rising by 10 degrees, what temps are you getting under load and what cooler ?
Click to expand...

I went from 50~52 load to 60~62 load on a Noctua NH-U12F cooler.

The main reason I wanted to get 3.2ghz is so i could run my ram at 1:1.
 
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