Yeah i was looking at EVGA NVIDIA GTX 750Ti SC 1176MHz (Boost 1255MHz) 5400MHz 2GB 128-bit GDDR5 HDMI DVI-I DP PCI-E Graphics Card.
My main worry is that yes this card is twice as fast as what i got but will that actually be reasonable improvement in practice with the ancient CPU i got.
Also my PSU is only 300W but i think 640 as well as 750 use about same power as 430 so shouldn't be a problem