i3 2120

What will it take for me to Hack my HP 6200 Pro Small Form Factor PC with i3-2120? What would be a solid GPU(LowProfile)? We are planning on running Final Cut Pro X https://support.hp.com/us-en/product/hp-compaq-6200-pro-small-form-factor-pc/5037900/document/c02779493 Thank you Jer

This is my second build, somewhat more of a budget build. Specs; CPU: i3 2120 (Sandy) MB: Gigabyte H61M-USB3V (Sandy) (M-ATX) Ram: None-descript 4GB 1333Mhz DDR3 HDD: WD 250GB CPU Cooler: Stock Intel Cooler Case: CiT Barricade (M-ATX) GPU: Asus GeForce GT 610 2GB DDR3 PSU: CiT 430W Gold ATX*...