Would you consider this overclock stable?

Ok i was trying to overclock my old rig,which is going to be used by my sister till i can get my own place(web surfing and playing DDO),then it will be turned into a HTPC(that will also play PS2 games).

The system is:

Intel Core 2 Quad Q9450

Coolit Domino ALC cpu cooler

4GB of Pariot Viper DDR2 1066mhz

XFX 680i LT

GTX 460SE 1GB

Ultra X-Pro 600w

Cheap ultra case

 

Now i have overclocked the cpu from 2.66ghz to 3.2ghz my voltage i think is 1.365v with a VTT of 1.4v,the ram was running at 800Mhz for some reason,i set it back to stock settings,which is 1066mhz 2.1v and 5-5-5-15 timings.

It boots up just fine,i left it running overnight with google chrome up,then eariler i started running prime95 small FFT's and it has been running for almost 2 hours,and the hottest core only got up to 66c.

But i can't keep it running for much longer cause i have to go to work in less than an hour and i would rather not leave it running prime95 while i am not here just incase something happens lol. 

Would you guy consider it stable?

Well, a common goal for stability is to get the system running under Prime95 for at least 24 hours straight (some would go up to 48 hours) so you will have to leave it running when you fo to work.

Prime95, when encoutering an error, will shut down that particular thread. Also, if you're running at 66C under load, I don't think that it will be that much trouble to keep things running without watching. I have encountered problems myself where my setup is only stable for up to 6-12 hours afterwhich "hardware fail" or blue screen.

He is correct. 24 hours minimum.