View Full Version : GTX 280 and Rosewill 850W

06-23-08, 05:00 PM

This is the power supply i have now...running almost for a year, and it does kick ass job.
I got 6pin to 8pin cable adapter with PSU. Do you think that my 6pin can provide enough juice through 6-8pin cable adapter for a card?

6pin connector can provide 170W by reading spec sheet, that enough?

06-23-08, 06:30 PM
With an 850w Rosewill PSU, what are you worried about?

06-23-08, 07:08 PM
With an 850w Rosewill PSU, what are you worried about?

I was saying to use only 2x6pin connectors, one with 6 to 8 pin adapter. I read letter from nvidia on evga site that it's not recommended to use two 6pin cables to connect to 26pin-8pin adapter.

06-23-08, 08:52 PM
A 6-pin can only provide 75W of power. If your PSU has 3 availalbe 6-pin cables (which I'm sure it does), you can use a dual 6-pin to single 8-pin PCI-E adapter which should come with your card, then you should be set.

06-23-08, 08:56 PM
If you have a PCI-Express compliant motherboard, you may be able to get away with the 6-pin to 8-pin adapter. PCI-E 2.0 slots give 150W of juice to the card instead of 75W. That would help. My motherboard is not PCI-E 2.0, but I still seem to be O.K. I have a 750W power supply.

06-23-08, 09:06 PM
I wouldn't gamble. The 8-pin can deliver 150W of power, and to match that you really do need two 6-pin connectors. It's better safe than sorry.

06-23-08, 09:53 PM
Aren't the two extra pins just redundant grounds? I'm pretty sure they are.

06-23-08, 10:46 PM
How about my 620hx? It's powering my 9800gx2 which is overclocked right now (but it's 8 pin goes directly into the psu (modular), and on the site it says 6+2).

06-24-08, 12:56 AM
The 620HX is fine for this card. Minimum is 550W with combined 12V current rating of 40A.