While I know the Radeon HD 6670 I bought isn't top of the line, I knew it was certainly an improvement from my 8600GT I was upgrading from.
However, after installing the new card, cinematics in video games have been stuttering, and the stuttering has occasionally leaked into my game play. Example game would be Splinter Cell: Conviction. This has never occurred before.
I am running Windows 8 (beta), which I thought may be the issue, but my old 8600 worked (without any drivers, even!). What's going on with my computer? I am running at 1600x900, so not too taxing.