Ati radeon 4650 hd 512mb graphics card?

i just bought this 3d card nd now i feal like it wont run that fine with powerful games... can anyone tel me is it good card to suport high games nd will it work efeciently nd i would found it realy helpful i anyone would tel me some names of game dat would run well on it... i have dual core 3.0 gegahertz pc wid 1gbram