Strange lag? issue...please help

Used to get a similar thing in games (Would be 70fps+ in Counter Strike normally, then it would dive down to 9fps for 30 seconds) and eventually watching videos on YouTube. Turned out to be my PSU in the end. Changed that and I've never experienced it since.
 
it's spotless :( but its only got an AMD fan, that came with the CPU...is that what is really causing teh issue? as its only started happening recently and i have had this rig for over a year or so now

I wouldn't have thought this would cause it - but you'll probably want to act on it anyway.

Have you tried using Task Manager whilst experiencing a slowdown, to see what's using up your % CPU?
 
Used to get a similar thing in games (Would be 70fps+ in Counter Strike normally, then it would dive down to 9fps for 30 seconds) and eventually watching videos on YouTube. Turned out to be my PSU in the end. Changed that and I've never experienced it since.

Agreed - we need to know the brand of PSU, a cheap PSU could be providing unstable power.
 
thanks for teh help i really appreciate it, ill stick a new PSU in when i can and update on what happens, for the record though will this casue damage to anything if i keep this crappy one in till then?
 
thanks for teh help i really appreciate it, ill stick a new PSU in when i can and update on what happens, for the record though will this casue damage to anything if i keep this crappy one in till then?

simple answer Yes if you psu is cheap and on its way out if it goes pop (sounds like it could be ready to go pop) it could take 1 or all your components with it. Cheap PSU is like running tescos value oil in your BMW M3 its just going to go pop at some point
 
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