Undeclocking Limits with athlonXP

[Sonix7]

HI all you there,

well, this is the story, a friend of mine had been with CPU overheating problems a few time ago, because the systems hangs in everygame played, movie played, etc. so we decided to underclock it. first of all, the specs: MSI kt6 delta, AthlonXP 2400+, an 512Mb PC3200.
So, We just set the multiplier or core ratio to 6.5 (Was that a mistake??), hence the cpu frecuency would be 6.5*133=866, after that the PC didn't boot I mean no signal at all, and the monitor keeps in standby.
We decided then, Clear the cmos (adjusting the jumper in clear data) and after that, the system doesn't even turn on its power led, once again we left the jumper in its deaful state (keep data) but It didn't work either, the power led turns on, but the system doesnt boot. finally my questions are:

Did we broke something?
Is there another thing to do?
Does the atlhonxp have a minimum frequency operation?

p.s. The bios doesn't emit any beep code.
Thank You

 

[DaNorthface]

your hardware should be fine.. unless you did anything to the hardware besides underclocking it, then all you have to do is reset the CMOS and it'll be back up. Your CMOS is probably not getting reset properly, so here's a few more things you can try:

1. Turn off the computer
2. turn off the psu
3. push the power button a few times to drain all the power out of the psu
4. place the cmos jumper to reset
5. take out the mobo battery
6. with the cmos jumper back in and psu turned back on, try booting up
7. if it doesn't work try putting the battery back in and boot

also, if you're having overheating problems at stock speeds, then your heatsink isn't on properly. Make sure you check that.. and make sure you have thermal grease btw the cpu and heatsink.

 

[Jen]

also the processor may be multiplier locked ,




Jen

 

[Sonix7]

Danorthface & Jen were totally right, thank you.
- first we forgot to unplug the psu.
- we think the issue is on this athlonxp which is a thorton model thus multiplier locked.