hey guys, my 2 month old rig used to be able to run a 3.7ghz stable overclock (tested with prime95 for 24hours). now i can't even boot at 3.2ghz.
i'm now running it default at 2.66ghz until i can identify the problem.
rig: e6750/ 2gb crucial ballistix ram 800mhz/ gigabyte p35 ds3l
i've tested the ram with memtest it seems to run fine. not sure why i can't overclock anymore. would appreciate it if you guys could chime in the possible reasons for this so i could weed out the problem. remember it used to run at 3.7ghz stable up till a week ago when it started crashing on me whenever i overclock it.
only recent addition is a mybook 500gb external HDD which is always plugged in. is too many usb connections a possible reason?
edit: i've tried loosening ram timings and uping core voltage to no avail.