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Power for 2 Radeon Hd 6850'2

Last response: in Graphics & Displays
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August 15, 2012 5:11:46 AM

My power supply is a coolermaster RS-600-PCAR-E3..

I'm unsure whether or not i can run crossfire radeon 6850's.

I currently have one installed and i see that is takes 2 six pin power connectors, does this power supply have 2 more for another card?

More about : power radeon 6850

August 15, 2012 5:32:01 AM

Catually i think it needs ONE 6-pin , and some sort of crossfire bridge.
Not safely ;

Guru3D's power supply recommendation:

Radeon HD 6850 x1
On your average system the card requires you to have a 450 Watt power supply unit.

Radeon HD 6850 x2
A second card requires you to add another ~130 Watts. You need a 650 Watt power supply unit.
it CAN handle it, but the PSU wont last long, because they generally SHOULDNT be stressed beyond maybe 70% of its total power for prolonged amounts of time.
And are you SURE they need TWO connectors, cause two in CF have a TDP of 250W.
Thats 150W from mobo and two 6-pin connectors (75Wx2). Re-check that.
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a b ) Power supply
August 15, 2012 6:51:30 AM

I would say go with a nice 700W or 650W.
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August 15, 2012 7:10:32 AM

I agree Deemo i actually did have xFire'd 6850's but i have a rosewill hive 750Watt
. (Traded them out for a single 7850 gonna crossfire soon :D )
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August 15, 2012 7:43:23 AM

Yea it for sure has 2 six pin connectors hooked to the gpu.
So I should get a bigger PSU?
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a c 259 ) Power supply
August 15, 2012 8:21:42 AM

AMD recommends a 550w power supply for a system with 2 x HD 6850s.

http://www.realhardtechx.com/index_archivos/Page362.htm

The bad news is that you have a Coolermaster Extreme Power Plus power supply. It's made by Seventeam and known to be junk. In fact it can only put out 450 watts.

http://www.hardwaresecrets.com/article/Cooler-Master-eX...

I would not trust it to power 2 HD 6850s. Go with a quality unit from Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ or Antec of 550-600 watts.
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August 15, 2012 12:50:07 PM

A solid 550w should be the way to go, you will have more than enough in reserve to so you will not be running any overvoltage situations.

I am now sold on XFX products, the XFX Pro 550w should be a relatively inexpensive unit with high end components.
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a b ) Power supply
August 15, 2012 1:15:27 PM

First of all, make sure your motherboard is CrossFireX ready. You also need a bridge interconnect cable.

Get yourself a PSU that comes with 2x 6+2 Pin PCI-E connectors to enable CrossFireX.

CORSAIR Gaming Series GS600 600W http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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August 15, 2012 2:07:35 PM

Good point out on the CrossfireX, don't want to be buying two cards realizing your board is only SLI ready. The interconnect normally comes with the cards or the motherboard if it is CFX ready.

6850's are not power hungry but most of the good value PSU's are in the 600w range which is more than enough.
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August 15, 2012 2:23:25 PM

The board is for sure crossfire ready, its an Asus p7p55 lx.

How hard is it to remove the power supply and rewire a new one?
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August 15, 2012 2:27:24 PM

Not hard at all, you may ask if you have issues. What is the challenge is that horrible thing called cable management, getting things neat and tidy to ensure better airflow in the chassis and also nobody likes cable cluster.
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August 15, 2012 2:33:49 PM

Do you have 6850's now or thinking about getting them?
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August 15, 2012 2:40:09 PM

No a HD 6850 is a single 6pin PCI-E connection.

As for the PSU the Extreme Powers are not designed for high peformance gaming systems or multi card systems, it is very basic and unfortunately basic creates problems. I would invest in a better build quality, skimping is the way to run into trouble, the PSU is your backbone.
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August 15, 2012 2:45:08 PM

I only have one currently.
Just bought the computer.
I think this gpu will run on only one 6 pin connector and needs 2 to be overclocked..
I just need someone to reassure me before I buy another card
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a b ) Power supply
August 15, 2012 3:18:46 PM

You need 2x 6 pin connector for crossfire, not for overclock.
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August 15, 2012 3:28:34 PM

So why does the card have 2 connectors?
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a b ) Power supply
August 15, 2012 5:02:26 PM

The card does not have 2 connectors. When you own two cards, you use two connectors.

I would not trust that power supply you have now to power the 2 6850's in CFX
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August 15, 2012 5:48:31 PM

I ran 2 5850's overclocked on a Seasonic 650X power supply with an i7 950 overclocked and 5 HDDs. I never drew more than 450 watts according to the UPS.

I also used adapters to give me the PCIe connectors for the 2nd card.
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August 15, 2012 8:34:30 PM

Ok here's a link to the gpu I have
http://www.asus.com/Graphics_Cards/AMD_Series/EAH6850_D...
At the moment it is using both of the six pin connectors... But I don't think it needs too. I think it can be ran with only 1 hooked up, at least I've read of someone doing that..

So that being the case, if I install another card and have both using one six pin, and attach the crossfire cable between the two will it work?

The card is the main part of confusion, since some 6850s have 1 six pin and these have 2.

Would it be safe for me to unplug one of the connectors and try to boot up?
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a c 259 ) Power supply
August 15, 2012 9:27:33 PM

Factory overclocked non reference card. If it has two 6 pin connectors then it needs them both. Based on adding a second card like that up my recommendation above to a 600-650w power supply from those brands. You will need one with 4 x 6 pin connectors. It's a bad idea to run adaptors unless you have to.
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August 15, 2012 9:47:34 PM

Ok, when I get hone tonight I'll look at my whole setup and post it so you can recommend a power supply, I know its an Asus p7p55, 1Tb 7200rpm hd, I3 550 @ 4.2 GHZ,

It also has a cooling unit hooked onto the motherboard, and an additional fan in the back, both are made by cooling master
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a c 259 ) Power supply
August 15, 2012 10:35:41 PM

The rest of your components don't really matter.

Any of these are excellent choices and they all have the 4 x 6 pin connectors you need. The only bad thing is that cheaper models lack the extra 6 pin connectors. The good news is that these are all top quality units.

http://www.newegg.com/Product/Productcompare.aspx?Submi...
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a b ) Power supply
August 16, 2012 3:02:52 AM

anort3 said:
The TX ( you linked to ) only has 2 x 6(+2) pin connectors. He would have to use adapters.


Ah, youre right. I'm used to the 6850's having one connector, but the overclocked ones have 2 correct?
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a c 259 ) Power supply
August 16, 2012 3:08:47 AM

Deemo13 said:
Ah, youre right. I'm used to the 6850's having one connector, but the overclocked ones have 2 correct?


Yeah the OP's card requires 2.
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August 16, 2012 5:53:38 AM

XFX Core Edition Pro 650w 2x(6+2) and 2x6.
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