I seem to have a problem with my CPU utilisation maxing out at 100% and staying there whenever anything that uses 3D graphics is open on my desktop.
AMD Athlon 2400+ (Not overclocked)
1.25GB DDR 333 RAM (Not overclocked)
Windows XP Pro (SP1)
2 HDD (One is 80GB one is 200GB)
Sapphire Radeon 9950 256MB (Unlocked to a 9600 but not overclocked from there)
Belkin Wireless keyboard and mouse
One PCI card (Wireless Lan adaptor)
The problem's started occuring over the last week or so (I installed the new graphics card over a month ago). Whenever I open a game or application that uses graphics (examples include Homeworld 2, Empire at War, Football Manager (which is 2d graphics), or even ATITool (which just features a spinning cube) ) the CPU maxes out to 100% and I struggle to use the mouse or keyboard etc. Some of these games aren't that new and used to run just fine on my old Radeon 9200.
I've checked all the obvious things (spyware, viruses, rouge processes etc), I've dialled down the clock speed of the graphics card to below the manufacturers standards, and I've removed all grpahics card drivers and installed the latest catalyst drivers.
It's driving me crazy. Can anyone help?