I Have the OPTIPLEX 9020 MT.
I7-4770.
Stock ram dual ddr3 8 gb @ 1600 mhz. Dual channel.
Stock storage raid 0 1TB. HHD
Stock PSU 290 watt
Graphics Card Upgrade.
M.S.I 1050 ti. 4gb VRAM
Antutu before upgrade was around 300,000
After graphics upgrade was around 480,000
Gaming FPS count max settings 1080 p
Call of duty 3 Zombies at 55-65 FPS.
I love it. Paid $210 Canadian flat for the tower. And $200 for graphics card flat. So I game at 1080 p max settings @avg 60fps for $410 Canadian flat. Amazing deal. And it was plug and play. No other mods needed. Hope this helps all who read.