Hello! I've been bored recently, and I went ahead and purchased a cheap Optiplex 390 MT tower to do a very, very cheap upgrade on it. I bought it because I've heard it's fairly easy to upgrade. It has a Quad Core I5, 4gb ram and 250GB storage. I've already got more ddr3 ram and bought a new hard drive. I'm guessing it needs a new power supply, which I'll have to purchase. This is going to sound very low, but I'd like to get a graphics card for around $90. But, I have no idea what to get, and not sure which one will fit in the case (think it's PCI-E). It doesn't have to be anything fancy, or doesn't have to have max graphics settings in games (I don't expect that for such a low price). Just something that'll play games comfortably. When it comes to the aspect of PC hardware I just have no clue. That's why I'd like to ask you guys for suggestions. Thank you!