Need a recommendation for graphic card,the current one is nvidia GTS 450,it's the very old one and I got a widescreen 1920x1080.It cannot support HD,when im watching movies or playing games in HD,the graphics are blurry,so I think the problem is graphic card.Budget is around 100$(I will probably be looking for used ones).Other specsrocessor AMD phenom X4 9650;DDR2 4gb ram.