PC trouble(not starting or monitor not turning on) after RAM overclock

[wolf2009]

My PC :

420 W PSU

P4 Northwood 2.8 Ghz

1 GB DDR400 , 512 MB and 256 MB DDR333 RAM sticks

ASUS P4C800-E Deluxe Mobo .

 

THe PC would overclock easily earlier with ASUS AI Booster . Yesterday i tried to overclock my RAM with memset . Somehow the timings got screwed . THe PC would reset after restarting . So i uninstalled Memset and set all options to default in BIOS . But now when i try to overclock the PC resets or the monitor loses while processor fans keep working .

 

Also i noticed in cpu-z that the DDR400 ram (DDR333 sticks removed ) was working at 200 Mhz while it was working at 133 Mhz previously for some reason ( with DDR333 sticks in place ) .

 

Plz help .