First, let's start with my system.
Optiplex 390 with:
Intel Core i3 2100
250 HDD (Not sure, i think it's stock)
Having a problem with:
Radeon HD 5450 (Visiontek 900860)
My Radeon HD 5450, when I put it into the pci-e slot, is detected, works, however, has blue/green lines...