Hello, I recently purchased a I5 3570k processor, a ASRock z77 extreme4, Corsair vengeance 1x8gb ram, and a new case. I already have a PSU, a corsair TX750 V2. I'm looking to get a new GPU (from a gt 9800) i know it's old, thats why i'm here. I would like to know if i should get two "lower" ended cards and do SLI with them or one higher ended card. I'm running on a 1650x1080 screen but will hopefully be able to get another soon. I have a 400$ budget for a card. Looking for any advice. If there's anymore info you would like to know ask me!