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BIOS changes have screwed my computer!

J

Jetsetivan

Junior Member
Hey there, I have a system that, at first, I had gone into the BIOS to change CPU multiplier and AGP aperture size (from 64Mb to 128Mb because, I figured, my fx card is a ATI 9600 XT 128Mb) and then when it tried to boot up from then on, I would have a blank screen. Soooooo someone at the forums helped me out by telling me to pop out the mainboard battery, unplug the system for a while and then use a piece of metal to touch the battery connectors on the mainboard and voila, the system worked.

Fast forward and I noticed that somehow the BIOS default set the CPU FSB to 100Mhz, so my Athlon 2800 + was running at 1.25 Ghz. So I did something stupid and went into the BIOS AGAIN, but to only change one setting : the CPU multiplier (FSB speed) from 100Mhz to 200Mhz. I have an NForce 2-based board and now I'm stuck in the same situation as before, except this time, popping out the battery and disconnecting the power supply don't solve the problem. Have I fried my CPU?? I kind of doubt it, but if not, what can I do short of buying another motherboard?!?!

Any help at all would be much appreciated!
 
shut it off, pull the power, reset the cmos, reseat the cpu, try again, see what happens. (If you dont remove the plug, you wont clear the cmos by pulling the battery)
 
Go into your BIOS and set your CPU FSB to 166 (333), which is correct for the Athlon 2800+. That should fix your problem.

\Dan
 
I think he's saying that, no matter what he does now, he cant see anything, including the bios, so he would be unable to set the FSB to anything.
 
what kind of mobo do you have? when you unplug the power and take out the battery or switch the jumper setting you usually have to wait at least 5 seconds before you switch it back and plug in the power. do you hear any bios beep sounds? by the way, the AGP aperture size is not directly determined by the amount of memory your graphics card has. AAS is the amount of system memory shared with the AGP graphics card in order for it to have more memory to process textures and other visual data. some people recommend you set it to half the amount of your total system ram i.e., if you have 512 MB then you'd set it to 256 MB. others may even recommend you set it equal to the total amount of system ram you have. either way, this may result in a performance increase or even drop if you share too much memory with the AGP card. you'll just have to experiment and see which setting works best for your computer. 🙂
 
JohnKr1 is right, I can't see anything at all, and Tango57, yeah, I've even unplugged and popped the battery out for as long as 12 hours. I'm hoping that there is a jumper solution on the board, but I don't have my mobo manual so I'm going to try and find a PDF diagram of it online....... unless the BIOS jumper is really generic in which case I'd also very much appreciate if anyone can describe it to me!

Cheers
 
yep just look up your board at the manufacturer's website and they should have a manual for download. if not you can probably still find the jumper setting by looking carefully for it on your board. it's usually located near the battery or memory dimms and probably labeled something like JCMOS.
 
I dont know why you dont post the MB that you are using.
If the bat is under a clip that you had to spring up when taking out the bat you probably have it sprung so much it is not making good enough contact with the bat. Push down on the clip while booting and see if it will boot.

Bleep
 
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