x38 Overclocking

Shiz · 30 Oct 2007 at 11:47

Hi all,

Have been having a play with a new x38 mobo I'm testing and I can't seem to get past 470FSB. Here's the skinny:

The board is windows stable at 470FSB with 1.45vcore, stock NB and stock SB. Memory and CPU multi/dividers are lowest possible. However, as soon as I raise the FSB to 475 it won't even post. The LED screen readout says "CPU" which would make me think it was a CPU problem. However, the E6750 is windows stable at 470*8 with no problem.

I have al the typical options disabled...anyone got any ideas?

Wiggins · 30 Oct 2007 at 12:49

Is it an Asus board? If so and I may be wrong but it could be an FSB hole, so my advice would be to crank it up to 480 and see what happens.

Jleo · 30 Oct 2007 at 12:49

Decrease fsb use x8 multi to exceed your current overclock, this will let you know if its fsb or cpu related

sablabra · 30 Oct 2007 at 12:53

Maybe your cpu hit an fsb wall? See if you can increase the voltage slightly. I'm not familiar with this board, but is there anything called "cpu pll voltage"? Or "fsb termination voltage"? Or simply nb voltage... All of these may help you get further. You might want to check what's normally called "strap"-something (different name from bios to bios) with usual options: 333, 266, 200 MHz. If you have that option set it to 333 MHz. You're sure your memory isn't stopping you?

Shiz · 30 Oct 2007 at 14:14

Hi all. Thanks for the advice. The review is up now so you can find it on XSR. Better now post link as there are some competitors advertising with us

.

It's an MSI board. I attempted upping NB, SB, CPU, FSB Termination voltages and none made any difference. I lowered memory divider, loosened timings and everything. No difference. I also checked to see if it's an FSB hole but no good.

I lowered FSB and raised multi, completely windows bootable so it's a mobo issue.

I think I may have just hit the max of this board, but it seems very strange that the board is benchmark stable at 470 but 475 it won't even post :S.

Edit: Well the review would be online if 1and1 wern't awful hosts...

sablabra · 30 Oct 2007 at 15:51

Like I said, it could simply be that your cpu has hit a cpu wall. I have it on my Q6600 around the same region (475-480 fsb), doesn't matter what multiplier I'm using it won't boot. Your E6750 would normally reach a higher fsb, but you might be unlucky. Have you tried it with another mobo?

Shiz · 30 Oct 2007 at 16:47

Well its windows stable with 470 at 8x but 475 isn't stable on anything. Weird...

sablabra · 30 Oct 2007 at 17:31

Shiz said:
Well its windows stable with 470 at 8x but 475 isn't stable on anything. Weird...

Same for me, pretty typical for an fsb wall. Either you have to keep changing all settings you come over i bios, or you'll have to test with another mobo to see if it's the cpu stopping you.

Jleo · 30 Oct 2007 at 17:38

Shiz said:
Hi all. Thanks for the advice. The review is up now so you can find it on XSR. Better now post link as there are some competitors advertising with us .

It's an MSI board. I attempted upping NB, SB, CPU, FSB Termination voltages and none made any difference. I lowered memory divider, loosened timings and everything. No difference. I also checked to see if it's an FSB hole but no good.

I lowered FSB and raised multi, completely windows bootable so it's a mobo issue.

I think I may have just hit the max of this board, but it seems very strange that the board is benchmark stable at 470 but 475 it won't even post :S.

Edit: Well the review would be online if 1and1 wern't awful hosts...

Yes disappointing indeed but not the first time I've heard this in regard to the X38 its an issue that may be resolved in a later rev or bios update hopefully.