Topic Title: 5870 Crossfire
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Created On: 04/24/2014 03:09 AM
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 04/24/2014 03:09 AM
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So i'm planning to buy two AMD Radeon HD 5870's from a friend. But i've been looking over some stuff, as both require two 6 pin connectors.


I have a Corsair CX600 600 watt PSU. It has 2 6-8 pin connectors, and 4 female molex plugs. One of the molex plugs is used by all 4 fans in the case connected to one another. Sadly, they only use molex and not 3 or 4 pin fan connectors, so i'm sorta forced to use it.

Anyways.. Since there's two 5870's, i'm on a shortage of 6 pin connectors.

But because it's provided, two dual male molex to 6 pin connector, I was wondering.

I'd only have 3 molex plugs available. But could I get a male to 2 female molex adapter so I can have 4, then use all of them with the PCI 6 pins to power both graphics cards?

Edited: 04/24/2014 at 03:24 AM by Protozerostar
 04/24/2014 09:24 AM
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You're going to be running that PSU close to the edge, looking at 350-400w depending on how you clock them and the load you put them under just for the cards, +150w for the rest of the system. My advice would be to upgrade to a new PSU in the 850w range by the same manufacturer or OEM (SeaSonic).

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 04/24/2014 11:15 AM
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I have the Corsair TX750m and does the job just fine.

Not too many people recommend using molex to 6 pin adapters.

Better safe then sorry.


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 04/24/2014 05:05 PM
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For sure it's not reccomended, but i'd do it to get two running. I don't often do too harsh of games, like Bioshock Infinite. Usually I play Counter Strike: Global Offensive, or Terraria. Maybe a few ancient games like Diablo and such in there as well. So nothing runs too crazy, and I use an Athlon x4 740 (( which I may upgrade )), so it's gonna bottleneck anyways x3

But if the configuration works, then i'm sure it will work.


Also, with everything powered, the system will probably run right around 450 watts, since I have a low power Processor and the rest of the system doesn't take much to do.

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