It actually depends on your CPU and number of drives installed. But if you only have 1 HDD, 1 CD ROM and 1 stick of RAM, that could be enough since the GT 640 only requires 65w. You could give me your full specs just to be sure.
You can actually check if the PSU can't handle it since the fan would usually be too loud
Not likely. I actually had a cheap PSU before that does not have the 6 pin connector 12v and 31 amps. And I connected my GTX 460 and the psu just died. so I got the 600 watt Antec and my system just fires up like nothing happened
You will actually know that the PSU can't handle it because the fan would start to be really loud.
Well normally I would outline it like this to make it easy for people to see. Also one thing to keep in mind that your power supply is old and its also likely that your power supply may not push the same wattage it did on day one. Also, I wouldn't buy a power supply around the idea of running your system at 80-100 percent load all the time I think that would be unwise as its a heavy load. It may be a worthwhile investment to update your power supply and would be happy to assist you if you would like.
CPU: i3 3220
MEMORY: 4 GB 1333 mhz
VIDEO CARD: WIP (work in progress)
Power Supply: 385 Watts
If your computer is a store bought computer please provide the following
ok ... My Mother is Gigabyte-B75M-D3H... so you are saying that i should buy a new psu and then the gpu.. ok thank you... but if i would like to buy a new card with the same psu what would it be? or it would not be worthwhile ?
We used to build $320 computer in India using low end cards like GT 430 before. And as long as you do not have Cards that require a lot of power like GTX -- or anything with 6 pin or 8 pin connectors. You would be fine even with 300 watt psu in my exp.
A 7750 would probably fit the bill. As it requires a 400w Power supply I would think you would be okay but again I can't speak to the validity of how stable your power supply is with a higher load of power.
With a better power supply you could easily get something more formidable a 650Ti, 660, or 7850 to name a few.
the card will be in high use only when playing c.o.d. in less than 5 hours a day... so i think it would probably be ok.. and i plan to change my psu but not right now... found this card on a crazy price so i woud buy it and i will inform you thank you guys !!!