I have been getting some strange reading in MSI Afterburner for my 5970. At first, I thought it was a GPU problem but now I am getting the same issue with my 9800GT. The GPU Usage ratings will be extremely erratic and jump from 1-99 during gameplay causing the game to run really slow and get about half the FPS as usual.
Could this be a possible PSU problem? The card is not getting enough power? It doesn't seem to be the video card. I would hate to have to rewire the whole damn computer with a new PSU. It's a Corsair 850TX. Does anyone know if there is a warranty on Corsair PSU's?
I just ran FurMark and it made my system completely unstable afterwards. As I write this the system will keep freezing for 5-10 seconds at a time. Generally the performance has halfed in every way since I built the computer about 2 years ago.
I have updated all of that. Thing is, it used to run just fine.
For example, when the desktop loads all the icons go white now for like 30 seconds and it takes twice as long to load. I'll get random freezes every 5-10 seconds. My mom's 10 year old computer is running faster for web browsing and such now.
Motherboard issue? Should I try the Hot CPU Tester at : http://www.7byte.com/ to test the CPU and Motherboard?
Have you run a speed/health report on your hard drive(s)?
I had a hard drive fail with very slow write speeds even though the reads were fine, and it exhibited odd behavior not unlike what you are describing.
Could also be the motherboard. I would rule out the hard drive first. If it can't write to the HD well, then it can't perform memory swaps.
A bottleneck is when a part of the system is keeping the other parts of the system from operating correctly, usually after a certain load is reached, like would happen when you are running a benchmark.