Basically, I cleaned out my computer, took out the video card for what I believe to be the first time, cleaned out the fan and heat sink with a q-tip, blew it off, etc.
Afterwards, jaggies have shown up in EVERYTHING. Games, YouTube videos, even my my Windows mouse cursor is jaggier than it used to be.
Thinking I might have gotten dust somewhere it wasn't before, I did a more elaborate cleaning with a toothbrush, which got LOTS of dust off of it. And wiped the PIN connectors with a q-tip with rubbing alcohol. (Gave about an hour to dry, q-tip did have some greyed out spots.) However, this did not help anything.
Everything was fine beforehand.
I am wondering what it was I might have screwed up, and if I might be able to fix this.
My graphics card is a SAPPHIRE 100265L Radeon HD 4830 512MB 256-bit. I have tried updating drivers, uninstalling drivers, etc. to no avail.