only thing that concerns me is my power supply, im not so sure if it can handle another 6850, or possibly bit faster card like 6870 or so on.
i came to current setup with help of very helpful people on the forums, but i cant exactly calculate current power usage.
so possible update to this set up is additional SSD for primary games and the OS and/or another ATI HD6850 card (so thats 2 in total) or 1 better graphics card.
thanks in advance
it just needs a little googling to find power consumption benchmarks.
your CPU:AMD FX-8120, AMD FX-6100 and AMD FX-4100 CPUs Review. Page 8
your GPU:Radeon HD 6850 & 6870 review
Measured power consumption - 6850
Subjective obtained GPU power consumption = ~ 121 Watts
by the way same review:
Measured power consumption - 6870
Subjective measured GPU power consumption = ~ 141 Watts
so your system power would be 164 and 121 for CPU & GPU. add in 4 watts for each stick of RAM(4*2=8), 10 watts for your HD to spin up and and since i am not familiar with the 990 i will over compensate with 12 watts for the chipset (intel's need 8) for a total of 320 watts
. opps 5 watts for the CD/DVD drive while in use
another 6850 will give a total of 440 watts
and with an SSD 448 watts
and according to HardOCP OCZ ModXStream Pro 700w 40C Update
you can go up to 552 watts
on the 12 volt rail
. which is where you're gonna need that power from.