HD Movies on youtube? did u use the latest flash player and updated ur graphics driver? anyways you do need a new graphic card..

You should get GTS250 man if you don't mind missing out on DX11..

I have 5770 with me and i felt abit disappointed due to the driver support and issues with games stuttering at start which would be gone after ahwhile.. Hopefully ATi resolves this issue with a new CCC update.. >.<