Hey, I recently went to a yard sale and bought an Dell Inspiron 660s for $15 and cleaned it up and installed 16GB of DDR3 1600 Mhz RAM. The computer runs okay-ish but I would definitely like to get a gpu for it under $75, a new psu for $50 max, and I have been eyeing NZXT's H500i @ $100 for a...