Turtus

Ok so if I don't do any heavy overclocks and I leave everything how it is in this build http://pcpartpicker.com/p/xRCx7P and just add Card 2 to the build everything should be fine?

Already have 1 can't afford the 980ti.

Yes I have 1 970 already. The 1 under card 1. But will the 650W power supply affect the preformance of both the cards at all?

ED 2 GPUs get 2 390s I already have 1 970. The 1 listed as card 1. I am not going to buy a brand new 980ti as I can't afford it.

I'm looking to have 2 GPUs in SLI. I just want to check that these 2 cards would work together and work as they are intended to under full load with a 650W power supply. Card 1 - EVGA GeForce GTX 970 Superclocked ACX 2.0 - https://www.pccasegear.com/products/29313 Card 2 - EVGA GeForce GTX 970 SSC GAMING ACX 2.0+ - http://www.evga.com/Products/Product.aspx?pn=04G-P4-3975-KR Power Supply - Corsair RM650 - http://www.corsair.com/en/rm-series-rm650-80-plus-gold-certified-power-supply Thanks Turtus

So Goat and Xenift. If I were to leave everything how it currently is and just chuck in a 'EVGA GeForce GTX 970 FTW+ GAMING ACX 2.0+' Everything would work fine?

I am looking to buy a seconds GTX 970. One that has 3 DisplayPort i/o slots would be perfect so I found "EVGA GeForce GTX 970 FTW+ GAMING ACX 2.0+" I was just like to know if it would work in SLI with my currant GPU, EVGA GeForce GTX 970 4GB Superclocked ACX 2.0 Also if they are compatible would my 650W power supply be ample for powering them. Useful Links: Currant Build - http://pcpartpicker.com/p/xRCx7P Currant GPU - http://www.evga.com/Products/Product.aspx?pn=04G-P4-2974-KR Desired 2nd GPU - http://www.evga.com/Products/Product.aspx?pn=04G-P4-3978-KR Thanks -Turtus