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Can I run two 6970's?

I'd go with a bigger PSU first. It can probably handle it but depending on how long your gaming sessions were, you'd be abusing the PSU pretty hard a lot of the time.
 
v6maro said:
yeah, this would be for gaming. on weekends, they can last 4hrs at the most in a single session, but easily 1-2hrs.

I used the PSU calc: http://hardforum.com/showthread.php?t=1643188 and it said 600w.
Click to expand...

Do not overclock the cards that much and it will work, a cool ambient with proper case ventilation will allow the PSU to not incinerate itself..

If I were you I'd put the cards @ 900Mhz and undervolt them to the minimum stable value.
 
I generally don't like maxing out my power supply. I try to keep it where they don't normally run at more than 80-85% of their total output capacity. They tend to run a little cooler and should last a bit longer that way.
 
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