Driver no go.
 

My HTPC had a Radeon HD 4870, big card with two extra power plugs. It started to screw up so I bought a HD 6450, doesnt even need a fan its so efficient.

Problem is I cant get it to work. Windows installs a generic vga driver for which doesnt even get 1080p resolution. If I manage to get a radeon driver installed after the windows splash screen it turns black and freezes. Ive tried old legacy drivers and the newest drivers its always the same thing.

When I have a Radeon driver I can start it in safe mode but then back to under 1080p for available resolutions. Its not that much different then the card it replaced it even uses a hell of a lot less power. I have no idea how to get this card to work.:confused:

Did you select the correct driver download? Looking at AMD's site they have the driver downloads split up into categories of cards, with the 6000 series being a legacy product. You have to select the correct O.S. under this header for your driver:
Hope this helps