So I right now have a regular, non mining rig. Just my day to day computer. That said, all I have is an 850W PSU in it, I was never expecting to pile 3+ cards in it. But now that I want to get into mining, I decided I might as well put some cards in my desktop to save money on another PSU for now.
My desktop right now has a Radeon 6970 (OC'd to 975Mhz getting 430MHash/s)
Also included in my desktop is an i7 2600k, a Seagate 7200RPM 1TB hard drive, an Asus P8P67 Deluxe Mobo, and 8gb RAM.
My entire setup: http://secure.newegg.com/WishList/PublicWishDetail.aspx?WishListNumber=15749245
I am wondering if its possible for me to put 2 Radeon 5830s into my desktop without trouble.
I did some basic math and it looks like my rig without graphics cards uses about 250W, a 6970 uses about 225W, and each 5830 uses about 200W. This rough math puts me right at 875W... over my limit. I am just wondering (hoping mostly) if maybe I did the math wrong and I indeed would be fine? Is there anyway to double check without going out and buying a Killawatt? I'd really appreciate it if someone could help me out.. maybe rerun the numbers or something.
Secondly, what would happen if I do go over the wattage? Will my PSU explode? Will my graphics cards burn up? Or will some things just simply not work, or the computer not turn on/randomly freeze?