My complete system specs are:
CPU: Intel Pentium D 2.80GHZ
OS: Windows XP - Media Center
Temps before video card were usually around 40-50.
The buzzing is difficult to locate but it seems near my main case fan.
I really don't know, I'm such a n00b I don't know what the CPU looks like.
EDIT: nTune confirms that the high temperature is from my GPU. This site would indicate that this is actually a normal temp:
TweakGuides.com - ATI Catalyst Tweak Guide
"A common question asked by users is "What is a safe temperature for my graphics card?" This varies depending on the particular graphics card series you have, since each is based on a particular architecture and hence has different heat output and tolerances. Typically, under most circumstances the 50-60 degree (Celcius) range is considered quite normal at idle, increasing into the high 70s under load. These temperatures will rise when overclocking or when your system is not properly cooled, and can result in crashes and freezes when under load. See the Overclocking section for more information on cooling."
Was I even right to think that my temperature was too high? Is the buzzing my only problem?
EDIT2: Never mind, I turned off my fan and started idling at 70.