I have had this problem recently on many different socket A motherboards (MSI, Epox, Shuttle and Gigabyte to mention a few). I install an AMD 1.0 GHZ processor on the motherboard, set jumpers and BIOS parameters to correct settings (I believe), and the motherboard only "sees" a 750 MHZ CPU. On the MSI, I never COULD figure it out. The Epox, flashed the BIOS, and didn't see correct speed until I remembered to "Load Setup Defaults" (duh!), then worked on next boot. Set the Shuttle system bus speed to 133Mhz and it worked, but CPU ran about 50 degrees C which I feel is fairly hot.
The current question is my Gigabyte GA7ZXR motherboard. I have a known good 1.0 GHZ CPU which worked fine on an Epox 8KTA3 before I upgraded to this raid board. Ever since the first boot, it's never seen any more than 750 MHZ. I have flashed the BIOS with every version to the earliest, the latest two do not show "Load Setup Defaults" as an option, rather "Load Optimized Defaults" instead. Tried that to no avail. Loaded the "F4" version (three versions back) which allows for "Load Setup Defaults", but that didn't work either. This board has dip-switches to set system bus. If I set it to 133 (to get full 1.0 GHZ), it locks up tighter than a drum. Not sure what else to try. I will be trying some tech support areas today, but I figured I'd try you good folks at the same time.
Is there some standard flash switch I can use to get the "Load Setup Defaults" back, or will it even matter?
I know of several other builders who have had similar situations and not been able to fix it, I've been fortunate enough to find a few answers. I figure I've heard of this happening enough, that there is probably something that I am doing wrong.
Thanks in advance.