Tried OS X Snow Leopard 10.6.2 Patched DVD for Intel-AMD by Hazard... It installed fine, used 'Legacy Kernel' but after installation while OS X boots up I get "Debugger called <double panic>" message after loading Apple HDA & TMCey driver or something like that I'm not exactly sure....

But when I reboot the machine I get a CMOS checksum error after the POST !!!!!!

Any suggestions ????

System Spec.
GA-G31M-ES2L(Mobo)
Intel PentiumD 820 (CPU)
2GB 667MHz DDR2 (Transcend)
Seagate Baracuda 250GB SATA
RTL 8139C PCI Ethernet Card