Originally Posted by disappearingone
I'm in the same boat with Prime95. I can pass 5+ hours on IBT using all 16 gig just fine @5GHz/4.9v but I cant pass 2 test in prime with out losing a core, no mater how much I tweek or even strait up pour voltage to it. The closest thing I have hit that will pass 24 hour prime test is 4.5 @ 1.38v and 1.27500 on the cpu/nb and a slight bump to the NB.
[EDIT] I have been contributing this to my inexperience as a overclocker but maybe it is just prime...still makes me feel as though I'v failed.
I keep hearing this about prime95 but I've had no problems. What MB?
prime95 gets my CPU hotter, by FAR, than any other benchmark or stress test program I regularly use. That heat has to come from somewhere -- a lot of watts are being consumed at that point. My theory is that some MBs just can't handle the load. They let the voltage droop too much when things get heavy and then you get blue screens. (or it's power supplies, or whatever the other weakest component in the system is)
You can see it go in a little cycle in prime95 - every couple of minutes there's a series of instructions that causes the temperatures to climb 4 or 5 degrees -- that's almost always when I notice instability and find out I need to adjust voltages.
I haven't used it myself, but has anybody tried toast? Especially if prime95 is killing you?
I usually use quite a bit more CPUNB volts than a lot of people I've seen posting -- from 1.4 to 1.45. Yeah, that's high, but it's what's needed to get close to 2400 MHz ram working reliably -- at least for me. AMDs overclocking guide mentioned going up to 1.45V (on air) and my MB DEFAULTS to 1.40 whenever I set it for 2400 ram, so I'm figuring it's OK. Maybe it's helped my prime95 stability?Edited by rvaughn - 11/10/12 at 8:48pm