no i cant replace a graphics card....here are my psu details :-
Model-supercomp sep 500.
Ac input voltage-140-240 vac ,50-60 ,hz active pfc
Ac input current-6.5-8.5 a
Dc output rating:-
+5V=20A
-5V=nil
+12V=25A
-12V=.6A
+3.3V=15A
+5VSB=3A
Atx 2.03=plentium 4
ATX 12V=450 WATTS.
So this is all what i got on my psu sticker .as its a local/cheap quality power supply unit . So maybe the information provided on the sticker of the power supply unit was more than its actual performance.so please tell me weather my power supply is strong enough to handle a gtx650 or not.......these are the 2 good ones that i found
zotac gtx650-www.flipkart.com/zotac-nvidia-geforce-gtx650-1gb-1-gb-gddr5-graphics-card/p/itmddmmkaqx7gjhh
asus gtx650 (this version doesn't requires a pci-e power connector)-www.flipkart.com/asus-nvidia-gtx650-e-1gd5-1-gb-gddr5-graphics-card/p/itmdgzguqj78z9k4?pid=GRCDGZGRZUQFJCBY&icmpid=reco_pp_same_graphics_card_19