I'm experiencing a similar problem...
I replaced my power supply (was a 300W now a 400W) and that has changed the problem...
Now when i let it sit long enough it does finally display... the BIOS... then it says "choose CPU speed" and offers me a choice... I choose 2000MHZ (mine) and save and exit, then it takes FOREVER to come back up, only to display the BIOS again with the same choice...
I know this isn't a power-supply issue because I plugged in my old card again and BOOM works instantly...
Specs:
Asus P4S333 motherboard running 512MB DDRAM and a 2.0GHz P4
ATI Radeon X850 Pro (AGP) 256MB
Creative Sound Blaster Live 5.1
DLINK 10/100Mb Ethernet card
SONY DRU 810A DVD+RW
80GB Maxtor HDD
floppy.
Using an HP f1905b flat panel LCD monitor.
Works PERFECT with my ATI GeForce4 Ti4600 card.
Won't get past the automatic BIOS "Choose your CPU speed" menu with the ATI Radeon X850 Pro (AGP) 256MB card.
ATI customer support (via email) suggested I replace the power supply. Now its saturday night and I can't contact them until monday...
ACK!
P.S.: I've tried moving around my pci cards to see if it was an IRQ conflict... it's not. Drivers and windows settings are irrelivant as it never gets that far. I've checked the charge in my motherboard's BIOS memory battery, its fine. I know the card works because the BIOS menu is displayed via the Radeon card. I know everything was connected right... except there is 2 places on the card to plug in something extra a 4 pin power cable slot and a smaller 4 pin slot that nothing my power-supply has will plug into...
Any suggestions?
-Tobei
