I am considering adding a second r9 280x to crossfire with my current one. Before I before I do too much more research, I want to know if my psu will be adequate. My current psu is a Rosewill Hive 750 watt. Keep in mind, my r9 280x is the Sapphire Toxic Edition and if I buy another 280x it will be a Sapphire Toxic Edition as well (Have two 8 pin power connectors, can draw up to 375 watts per card). My cpu is an i5 4670k that is overclocked to 4ghz.
This was written on my phone while I was on vacation, so please excuse how my writing is organized and any typos
Thanks in advance, I chose to post here because you guys are so friendly, knowledgeable, and quick to respond!!!