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How to use CrossFire

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Joined
30 Jul 2011
Posts
422
Im buying two 6950s In crossfire, But how do I use them? Once I install them do I just connect my monitor to ONE of the graphics cards and I get the power of them both or?
 
Yes, just connect your monitor to one of them (the top one). Make sure you install the Crossfire bridge to connect the 2 cards together. This should come with the cards.
 
I hope this isn't for the PC in your signature.

You'd need a new power supply and I'm not sure what motherboard you have.

Anyway:

Uninstall old graphics drivers.

Switch off PC.

Remove old graphics card and install new graphics cards.

Connect 2x6 pin PCI-E power cables to each card.

Fit the CrossFire bridge.

Connect the monitor to the top card (that's the only one you can connect to in CrossFire).

Start the PC.

Install drivers and CAP profiles.

Run games in full screen otherwise CrossFire doesn't work.
 
As above
It should recognise its x fire, if you uninstall old drivers, but check in ccc to ensure the box is checked
He's getting a new pc, as with other post I'd be looking at a 750w psu to be safe
 
Hmm ok, I just came across another post on this forum and the majority of people say that 650w should be fine?

No way, not for crossfire 6950s. I use an 850 watt Corsair PSU and that's the absolute minimum I would dare to use, and only because Corsair make the finest quality units.
 
Hmm ok, I just came across another post on this forum and the majority of people say that 650w should be fine?

I see in your other thread you were talking about the Corsair TX 650W V2.

That PSU only has 2 PCI-E power cables and you need 4.

There's no point in buying a new PSU for this build and then bodging it together with molex to PCI-E power adapters.

Get yourself a good quality 750W unit with 4 PCI-E power cables. You'll only need 6 pin cables if using most HD 6950's.
 
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No way, not for crossfire 6950s. I use an 850 watt Corsair PSU and that's the absolute minimum I would dare to use, and only because Corsair make the finest quality units.

850W isn't the minimum.

You can get away with a good 650W PSU but it's not ideal.

A good 750W PSU would be nice and comfortable.
 
I agree that it's not the minimum but I wouldn't be comfortable with it, hence my choice of wording :)

Your wording suggesed to the OP that they need an 850W PSU when they don't.

If you'd said how you don't dare use anything less than 850W, but that a good 750W will be fine, then then the OP would have a better idea of their choices.
 
Your wording suggesed to the OP that they need an 850W PSU when they don't.

If you'd said how you don't dare use anything less than 850W, but that a good 750W will be fine, then then the OP would have a better idea of their choices.

that's the absolute minimum I would dare to use

Shouldn't be construed as anything else other than that my personal preference is 850w minimum. Personally I advise against anything less than 850 and I stand by that.
 
Ok, So I shall get a OCZ 750W PSU and a Corsair 600t with a Corsair H60?

If you're talking about the OCZ ZS Series 750W '80 Plus Bronze' Power Supply then I'd give it a miss.

It's a 750W PSU but it only has 648W on the 12V rail so it's really no better than a good 650W.

Something like the Antec TruePower New Modular 750W '80 Plus Bronze' Power Supply would be good but it's out of stock.

If you want a recommendation for something that's in stock now then post back.

It depends when you plan on ordering.
 
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