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08 Aug 2011  
bobkn

Windows 7 Pro X64 SP1
 
 

Quote   Quote: Originally Posted by beastmaster View Post
Quote   Quote: Originally Posted by bobkn View Post
Sapphire requires a 450W PSU with one 6 pin PCI-E auxiliary power connector for the 6770. For the 6790, it's two 6 pin connectors, and a 500W supply.

You may be able to use a Molex-to-PCI-E power adapter if your PSU lacks PCI-E power. As you didn't list your PSU type, it's hard to say anything definite.
I have a Thermaktake 450W PSU so the 6790 would not work.

thanks
will do some review searches for those cards.
Which Thermaltake 450W PSU do you have?

This one:

Newegg.com - Thermaltake TR2 Series TR-450P 450W ATX 12V V2.3 & EPS 12V 2.91 80 PLUS BRONZE Certified Active PFC Power Supply

has 34A on its single +12V rail. I believe that it should be more than adequate with a 6790.

For comparison, the cheapest "500W" single-rail PUS at Newegg is:

Newegg.com - Linkworld LPK2-30-P4 500W ATX12V Power Supply

20A at +12V. (Probably wouldn't work well with a 6790, even though it's "500W".)

Here's a cheapish 600W unit:

Newegg.com - ePOWER TVPS650 650W ATX12V Power Supply

34A on the +12V rail, same as the Thermaltake 450W unit.

If your Thermaltake PSU is as good as the one above, I'd have no hestation about using it with a single 6970 if the system was mine.
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