The GTS 250s will probably not work (just realized)
This is due to how unreliable of a power supply the computer probably has..
I think the card's website states that the usual minimum of power required to run is around 450w while most
pre-built pcs only have around 300w, cant say unless i find it though >.>
A safer solution could be to buy a PC with the graphics card you want already installed
So, the power supply should be capable of handling it, then you could probably buy a monitor/keyboard/mouse seperatly
for an under-budget price
