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Problem with BIOS w/ FSB overclocked

N

NYHoustonman

Platinum Member
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?
 
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.
 
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?
 
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.
 
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.
 
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