Thanks guys, you're so kind.
Holy crap...did you purchase that just for mining? That is going to take a long time to pay back if you did. I have been pricing just one 5830 and it will take about 120 days if you keep increasing the difficulty.
That's just the reason why I purchase them for mining. I plan to use them for about 6 months and sell them in about 70% of the original value. I am pretty confident that I'll break even and even make a profit in this project.
I am running at 1200 to 1250 watts with my rig.
And I use a 1250 OCZ one.
1500w is good when you start running 4
When you have 3 phase and hitting close to 90amp each phase.
These 6990s are great to have. More GPU per system then going 4gpu setup.
Good suggestion, thanks!
I am afraid of the overheating problem, so I just start to try from the 3 GPUs plan. 4 GPU sounds good... I'll take it into consideration for the next rig.
Could you suggest me a good motherboard for a 4 GPU plan? The motherboard I am using now only support 3 GPU (GA-790FXTA-UD5 with PCIex16 * 2, x8 * 1).