A:Answer You wont be able to run an SLI configuration, there is not enough room. I have this computer and there is not a game around that it struggles to play. You want to make the computer better, suggestion list: put a Samsung SSD as your boot drive,put the full 16 gb of ram in it, I put a GTX 1080 in that computer and I could play everything on ultra, funny thing, the 970 could too. How to make it the best it can be: sell the 970, sell the processor sell the ram that came with. Replace the processor with an I5-6500k, its unlocked so you can over clock, lepta cpu water cooler, any ram you choose will work because you can overclock it. of course a SSD and get a gtx 1070 its one card that will beat almost any card beneath it running SLI, remember not everything supports SLI, My computer is in the 99 percentile of fastest on the planet I worked for geek squad for a long time. don't wast your money on another GTX 970.