Overclocked 3570k, question about stability using Prime95

[YattaRX8]

First let me mention that this is my first time overclocking.

Anyways, I've got my i5 3570k up to 4.4 ghz, testing stability with aida64 every time I brought the CPU up to a higher speed. After I got the CPU to 4.4ghz I ran aida64 for an hour, but I noticed my CPU usage dropped to 0% two or three times on my task manager, though aida64 said there was never a drop. So I was curious if that meant some errors were happening, so I downloaded Prime95 since I learned that tells you about errors as they occur.

I started Prime95's blend test, and all seemed well so I went to bed. After I woke up, I noticed that Prime95 crashed (note: the program crashed, not my computer). And judging from the "result.txt", it crashed after an hour. Does that mean there's a stability issue, or did the program just bug out?

edit: My temps never got too high, either. From core 0 to 3: 64C, 70C, 68C, 65C, according to CPUID HWMonitor

[Thu Jul 12 06:51:35 2012]
Self-test 640K passed!
Self-test 640K passed!
Self-test 640K passed!
Self-test 640K passed!
[Thu Jul 12 07:06:55 2012]
Self-test 8K passed!
Self-test 8K passed!
Self-test 8K passed!
Self-test 8K passed!
[Thu Jul 12 07:22:35 2012]
Self-test 720K passed!
Self-test 720K passed!
Self-test 720K passed!
Self-test 720K passed!
[Thu Jul 12 07:37:44 2012]
Self-test 12K passed!
Self-test 12K passed!
Self-test 12K passed!
Self-test 12K passed!
[Thu Jul 12 07:53:02 2012]
Self-test 800K passed!
Self-test 800K passed!
Self-test 800K passed!

 

[nna2]

did it give a rounding error? that means it needs more volts, but if it went for an hour, it's probably good for day to day usage, but not 24/7 loads

 

[DarkOutlaw]

Thats what it sounds like. Was this all cores or just 1 core?

 

[unksol]

If you don't mind your programs crashing and games crashing randomly I'm sure it's fine. Other wise I suggest you address the problem.

 

[Graphite946]

What voltage are you at?

Right now, I am at 1.27 volts for a very stable 4.5ghz

I have my ram pushed a little, but not far above the factory clock, whenever I push it, I immediately lose stability. I haven't pushed passed 4.5, and won't until winter here in Arizona. I ran prime95 overnight, and the hottest it got was 79C