Alright, so a couple of days ago I picked up a Dell Optiplex 755 from a library for a mere $3. I previously owned a Dell Dimension E521 that consisted of a AMD Athlon 64 5000+, 4 GB of RAM, and a HD 6670. So far I've salvaged the E521 and upgraded the Optiplex to 6 GB of RAM, slapped my HD 6670 in there, and I used a TB HDD from a computer I haven't used in a while. I was wondering if it would be a sensible option to upgrade the current CPU in my system (Pentium E2220) to a Core 2 Quad Q9550, replace the HD 6670 to a GTX 1050, and quite possibly upgrade my 6 GB of ram to 8. Keep in mind I got this computer super cheap and that I'm on a tight budget.