Problem with BIOS w/ FSB overclocked

[NYHoustonman]

I have Asus A7V333, 512MB Samsung DDR 2700 RAM, AMD Athlon XP 1700+A @1.75 ghz (145x12)...When I FIRST start up my computer, and try to access my BIOS, I can't, it locks up. When I turn on my computer, leave it on, then restart and try to access the BIOS, I can access it. I ran Prime95 for 12 hours with no errors. Anyone have any ideas?

 

[Kuroyama]

Don't know the solution, but I had the same issue with my Shuttle AK31a. Mild overclocking was fine, but anything large caused this trouble. New Abit motherboard has no such problem.

Someone told me that on a cold start some computers boot with default voltage (1.75V for Palomino), but will get the voltage right on a reboot. If so, then you CPU probably doesn't like your overclock on default voltage. You might try clocking it back to a 1700+ to see if the issue is with the overclocking. My experience was that this issue went away when I clocked back a bit.

 

[NYHoustonman]

I tried...didn't work. In fact, lately sometimes it fails to boot up, so I went back to 133x12.5 for now. I really don't feel ready to unlock the higher multipliers. Maybe the memory frequency ratio is messing up (maybe too high...b/c at 300 fsb, the memory at 4:5 would technically be 375 mhz, my memory is DDR 2700 (333))...could that be the problem? I have seen, in EVERY review, that a FSB of 160+ is stably possible...What could be wrong with mine?

 

[Kuroyama]

If running everything at default CPU settings still causes trouble then I don't know. All I can think is to reset the BIOS to the defaults; there should be a BIOS option of that sort or in the worst case you can clear CMOS. That'll at least clear up the question of whether any of your settings are too aggressive.

I doubt that the FSB is the problem by itself, 145 is not that high. My old Duron ran at 146FSB with no trouble. I'm running a 1600+ at 162x10.5 with Crucial PC2100. I've even run it as high as 186x7.5, and it was just fine. I don't think there's much benefit running the mem at 375 though, as it won't sync with the CPU at 290.

 

[NYHoustonman]

It's running fine at 133x12.5. what I'm probably gonna try later is turning up the FSB and turning the FSB/memory frequency ratio to 1:1.