The 5200 video card isn't a power hog. It doesn't even need a sepate power plug. It does pretty well within the basic buss slot voltage. The PSU of 220W should be enough for typical needs provided you don't go crazy and stuff the system. If I remember right the E310 is suppose to be a small case system thus you will need "low profile" cards, the 5200 will need to be one in order to physically fit. Here is the Dell tech forums that may have covered this topic or post you're own.
can some one help me if u connected a Dell E310 with 220 watt powerbox XFX NVIDIA GEFORCE FX 5200 card will it work and can u connect them?