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Can't run Athlon at 133MHz FSB?

R

rindurkar

Junior Member
I put together a system using an Ahtlon 1.4 Gig 133 MHz FSB proc, FIC AD11 board supporting the 133 FSB and DDR ram, and 256 Megs of 2100 DDR Ram.

The system was unstable as hell when I first started with FSB at 133 Mhz. Blue screened like hell.. I tried swapping the memory, same problem. On a hunch, I made the FSB run at 100 MHz and the system is rock solid.

Now, I doublechecked that everything *is* supposed to work at the 133 MHz FSB : CPU, mobo and mem. I cannot figure out why the hell this is happening.. Does FSB speed matter to other components like video card (have an AGP Rage), HDD, etc?

Any hints?

Tx.😕
 
Make sure you have the latest BIOS for the mobo and also does it run at 1400mhz at 100mhz fsb? Or is it running at 1.xx?
 
I have a 300 W Enlight case, supposedly "approved" by AMD. In any case, it is not overloaded right now. Case is open, so no heat issues.
I flashed the latest and greatest version of the Bios from the FIC site. It specifically says that that version is tested with 1.4 Gig 133FSB procs.

I did not muck with the multiplier settings, so its still at 10.5 x, which means effective proc speed is ~ 1050 MHz. 🙁

Thanks.
 
I don't know if you already tried this or not, but I downloaded the manual for your motherboard and on page 2-3 it mentions that the FSB is set to 100 MHz by default which means it is using a 1/3 divider for the PCI interface, so if you are setting the FSB to 133 MHz elsewhere it is overclocking all of your PCI and AGP devices by 33%! If you change that jumper to 133 MHz FSB so it can use a 1/4 divider it will keep the PCI and AGP devices at stock speeds and you should be good to go. Give that a shot and I hope that helps.
 
Hmm.. I was completely unaware of the PCI bus divider thing :-|
Presumably this is something I set through bios? I dont remember seeing a jumper or dipswitch to set the divider setting.

Thanks.
 
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