I have exactly the same problem.
My configuration is:
1. MB - Intel DP35DP
2. CPU - Intel Pentium E6300 (2.8GHz)
3. RAM - 2x 2GB Corsair DDR2-800
4. VGA - Sapphire Radeon HD4670 Ultimate
5. HDD - 2x Seagate 250GB SATA2
6. WLAN - Edimax EW-7728In PCI card
7. PSU - FSP ATX-350PNF
The issue started when I upgraded my CPU to Pentium E6300. I had flashed the motherboard with the 572 bios revision (from 517) while being with
a Pentium Dual Core E2180 several days before I decided to upgrade. Everything worked fine...
I had to flash back to revision 517 in Recovery mode in order to get rid of the annoying black sreen freeze after restart.
Problem Resolved. Defective processor. I found it strange that the processor was registering as a Pentium III xeon quad core when it was a Core 2 Quad 9650.
I returned the faulty processor. Upon installing the new processor, the workstation displayed the same symptoms as before.
I also took tsarya's the advice and tried to revert to an older BIOS (517). That didnt work well, but I think that path lead me to success!. My computer would not accept the flash .ISO or read the .BIO file. It would not boot from a USB port, either.
All of my software and XP needed validation afterwards.
I finally uploaded the most current BIOS, cleared the CMOS and the processor works and displays in properties as it should. Thanks for your responses.
Yes, I am on 572 with no problems whatsoever.
After replacing the processor, I had a lot of problems trying reverting to an older BIOS version (I tried several). It screwed up my GRUB bootloader (running Fedora 8 and XP Pro) I can't pinpoint with absolute certianty what the problem really was. I still suspect that it was the processor, but I have no way of knowing for sure.
My problems seemed to go away after reloading 572 and performing a CMOS reset. Let me know how it goes.