I'm asking this on behalf of my friend who wants to get into PC gaming however fell into the trap of buying a prebuilt ( A Slimline to make it worse ) and has intel integrated graphics. Anything he attempts to play is unplayable with his current setup so I suggested getting a new graphics card which then snowballed into bigger problems. The PSU is a no name 220W and an odd shape, so the upgrade there is limited as an ordinary ATX PSU won't fit. So I then told him to look into a new case to house the new card and psu. However with alot of the parts all being odd shaped i'm wondering if the motherboard will also be a strange shape.
The current specs are as follows :
i3 550 CPU
4GB DDR3 Ram
Intel HD GMA Graphics
220W Generic PSU
Or wait a bit to see the much stronger HD7750 (55w TDP) comes in a low profile to fit the slimline case. I think they are only full size now.
Either way, if your friend decides they like gaming then steer them to a new PC with sandy bridge CPU, not the older i3-550, a power supply in the 400w range and room for a $150-$200 video card. Until then their current PC with the <$100 video upgrade will game just fine.