With a 250W PSU will I be able to handle the 5450, 6450 or 6570? If not, what would be a good card for me to use?
Thanks! All help is appreciated
Well... for a 250w, i would suggest (and all of these are not recommended for a 250w system, but most likely will work) an Nvidia GeForce GT 440, or and this is pushing it, but i have heard that a Radon HD5450 will work on a 250w.
I saw that you said that you can't afford a new PSU, but please reconsider getting one before upgrading anything. Running any GPU with a less than recommended PSU can cause major complications, ultimately rendering your new GPU useless (unable to function).
A new PSU isnt that expensive and can can be picked up for as little as $25 for a 400w by Diablotek. HP put a 250w on that for a reason.
But overall, just upgrading your GPU to a GT440 or HD5450 is the best you could do (and again that is really pushing it) without a new PSU.