I've been thinking of adding another Sapphire Radeon HD 7950 to my build, but I have a couple concerns. First of all, a lot of threads that I've been looking at say that the 7950 has abysmal crossifire performance and often doesn't have any performance gains. These are mostly nearly year old threads however, so I'm not sure if the drivers have fixed that issue or not. Also, I have a Raidmanx RX-850AE 850W Gold+ PSU. I know about their track record as of now, but when I built the PC, I didn't have that information. I only bought based off the 170+ glowing reviews. Here's the Newegg page for that. http://www.newegg.com/Product/Product.aspx?Item=N82E16817152043&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID= Should I go ahead and get a second card since they're selling so cheaply, or should I wait until I have $400 to spare on a R9 290? Obviously a single card has less issues, but if I can pick up a 7950 for $150 and have it perform well, why not?