When I'm giving my system a little bit of a workout (on WoW in battles mostly) my system keeps having a blip. My monitor goes black, just for a few seconds, then everything comes back on. I get the little message on my monitor I always get when I switch the system on telling me which input is being used. It's almost like the whole system has just shut off for a few seconds then come straight back on, no start up screen or anything, just back to where I was before.
System spec:
I5 2500K
MSI P67A C45
GTX 560Ti
4GB DDR3
OcZ 500W StealthXStream Mk1
BenQ LED 24"
I upgraded to most of this a few months ago but didn't get a new PSU so I'm wondering if it's this thats causing the problem. It's a few years old now, 2 years or so I think, and I tend to leave the computer on for a good few hours a day, anywhere from 6-18!
Any suggestions as to what the problem might be

System spec:
I5 2500K
MSI P67A C45
GTX 560Ti
4GB DDR3
OcZ 500W StealthXStream Mk1
BenQ LED 24"
I upgraded to most of this a few months ago but didn't get a new PSU so I'm wondering if it's this thats causing the problem. It's a few years old now, 2 years or so I think, and I tend to leave the computer on for a good few hours a day, anywhere from 6-18!
Any suggestions as to what the problem might be


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