Hello,
im planning to buy a graphics card of sapphire amd/ati radeon hd 5450 1gb ddr3 but my PSU is 255W... Will it work on gaming????? my processor is Intel core 2 duo E7400 CPU 2.80GHz...
that this card requires a 400w psu, no way you could handle with a 255W psu, you will probably toast the video card, if you wan't to change the graphics card you must first upgrade the PSU, what kind of gaming are you looking for?
you will not be able to run recent games, but some old games in low settings you may be able to run. with this graphics card
It is not a gaming card but should work with a quality 255watt PSU it consumes less than 20watts on load http://imageshack.us/f/718/gfxpowerchartbybrandgen.png/