I have a problem right now with oc'ing my athlon 64x2 5000 black edition cpu. Here's a list of what I have hardware wise:
Asus M3A78 Pro w/ 780G chip set
2 gig kingston memory 6400 manually set for 5-5-5-15
Cooling is a Arctic Freezer 64 Pro ( air cooled w/ fan ) also have arctic silver on
operating sys is XP
Video card is Nvidia Geforce 9800GT
At this time I have the cpu running at 2.9 ghz with a voltage of 1.300volts and Multiplier of 14.5. I haven't touched any other settings at this time. I would like to try to get at least 3.10 maybe a little more if I can. But anytime I go over 2.9 Ghz the system will blue screen during start up after bios has run but before login. Any suggestions?
Sorry but I forgot to mention that the power supply is a 550 watt and that I have a Coolmaster case with 4 120 mm fans one at the bottom pulling air in, one on front pulling in, one on back expelling air and one on top expelling air out.
More vcore. Try 1.375 and push it more. If your temps are good, then go for a vcore of 1.4v and push some more. I woudn't push a higher vcore than that, but you could so long as your temps are good when you stress test it. My non BE Athlon 5000 X2 went up to 3.24GHz with my 92mm cooler.