Hi all.

I just bought a Slot 1 FSB 100 Mhz P III 800 for my Biostar M6TBA Mobo and it will not work. The Mobo does support processor up to 800.

When I install the processor, and start the machine, the fan on the heatsink spins up but the rest of the system is completly dead. I get the same response if I have NO processor installed and start the system. I get NO POST beeps.

The processor Vid card, and RAM is seated corectly, I have upgraded my bios to the latest version, and the jumpers are set correctly. Am I missing something?

Machine works fine with original PII 300 (I'm using it right now).

Do I have a DOA processor?

Try removing everything but your CPU, RAM , and Video card and reset these also...

There is also a backup method for getting into the BIOS, On my mobo its the "Insert" key. You hold this key down while powering up and it will take you into the BIOS, it might take a couple powerups before it works also (check you mobo manual for your key as it might be different)

hope this helps... thanks

slydog

Thanks for the reply, but none of that worked since I can't even get it to get past the poweron stage. The only thing besides, CPU, RAM and video card is my sound board, but I doubt it would cause the whole thing to compeltly lockup like that??? I'm starting to think its dead...

What Wattage is your power supply? I belive 800Mhz will need more juice?

Well, if you suspect it's a DOA CPU then you can return it as soon as possible to get a new one... but...

It could be just a mechanical problem that you're experiencing (happened to me in one of my builds before) so reseat everything one more time. Inspect the contacts of the CPU's PCB and make sure there's no surface film that can hinder good contact with the CPU slot pins. You say you get the same result when you have no CPU connected so maybe it just isn't.

I'm not familiar with that mobo but are you sure the latest BIOS recognizes P3-800's as well as PROVIDE the required Vcore voltage? Your CPU is a Coppermine and it requires 1.6 V of Vcore (your P2-300 I believe needs 2.0V). If your mobo can only supply 2.0 Vcore minimum then your system won't boot at all with that CuMine on board. And even if it could, you'd burn out the CPU in no time. If you're really intent on making a P3-800 work in your mobo then I'd suggest that you trade that Slot 1 P3-800 with a FCPGA P3-800 and get a slocket adapter that lets you adjust the Vcore thru jumpers (Abit, MSI, Asus, e.g.) for 1.6V, then plug it in and fire away. Well, that's my two cents. Good luck!

Is your RAM at least PC100? I believe some of the 300's used a 66MHz bus and others used a 100MHz. So if you have a processor that is using a 66MHz bus there is a real good chance that the RAM is PC66 and it will not like to run at 100MHz.

quote:Originally posted by mloiterman:
Thanks for the reply, but none of that worked since I can't even get it to get past the poweron stage. The only thing besides, CPU, RAM and video card is my sound board, but I doubt it would cause the whole thing to compeltly lockup like that??? I'm starting to think its dead...

I'm having the same problem with this computer I'm building. I powerup, but the fan is the only thing responding. I don't think its the CPU because the one I'm using right now doesn't work in there either. So frustrating! Now I go binge drink for 48 hours and think of the trouble I'm in. Damn machines.

**Note** YES I HAVE SUCCESSIVELY BUILT A COMPUTER. THANK YOU HAVE A NICE DAY.

if the other CPU works fine... then dont bother unplugging everything.... your motherboard probably just doesnt like that cpu. more then likely the previous poster was right about the voltage. any motherboard that still supports penium 2's is pretty outa date. the 800 mhz its talking about is probably pre-coppermine.

Well, the biostar website says that the mobo will support PIII 800 and I'm using the award Bios version TBA0223B. AFAIK it can support P III 800. DOes anyone have any contradictory evidence?

As far as the Ram is concenrened. I'm using 384 megs of PC 133 ram. It works fine. It is three sticks of 128. Any help would be appreciated.

quote:Originally posted by mloiterman:
Well, the biostar website says that the mobo will support PIII 800 and I'm using the award Bios version TBA0223B. AFAIK it can support P III 800. DOes anyone have any contradictory evidence?

As far as the Ram is concenrened. I'm using 384 megs of PC 133 ram. It works fine. It is three sticks of 128. Any help would be appreciated.

Hi mloiterman! Just wondering a few things... Please advise us what bus speed settings you set the jumpers to on your board. I'm wondering this since you're using 133MHz RAM and using a 100MHz FSB processor... which of course can work together fine but just not at the exact same bus speed settings...

Also, when the old processor was installed and you still had access to the BIOS, did you try to prepare any BIOS settings first before pulling out the old processor and replacing it with the new one?

Hope we can help you... I doubt the processor is bad.

No...did not mess with the bios at all.

I have the jumpers set to 100x8 for 800 Mhz.

I can't get my bios to recognize my new HD either.

UGHGHH!

quote:Originally posted by mloiterman:
No...did not mess with the bios at all.

I have the jumpers set to 100x8 for 800 Mhz.

I can't get my bios to recognize my new HD either.

UGHGHH!

Have you tried underclocking the processor bus speed? That is, have you tried jumpering the board to work the processor at the highest multiplier setting for 66MHz speed, instead of 100MHz speed? I know you won't want to leave it on that setting if it works, but I'm just curious for diagnostic reasons whether or not it will boot that way...