Is my PSU enough?

[phur]

Hello all,I am thinking about crossfiring 6850s since I already have one and I am not sure if my PSU is enough for it.

It would be 2 6850s and a Phenom x4 955.

The PSU I own is http://www.newegg.com/Product/Product.aspx?Item=N82E16817341022

Would this be good or would another 6850 require a PSU upgrade?

 

[Dainard Jackson]

Hi there,

I won't be upgrading for a while, but could you guys suggest me a crossfire compatible motherboard that is relatively cheap, but still is of good quality. My 6850 covers 2 of the SATA connectors on my board, which isn't a problem now as I don't plan to upgrade anytime soon, but in the future I'll definitely need more hard drives. And my old board supported ddr3 so I still have the ram from that.

Good luck.
Dainard Jackson

 

[davcon]

Hello all,I am thinking about crossfiring 6850s since I already have one and I am not sure if my PSU is enough for it.

It would be 2 6850s and a Phenom x4 955.

The PSU I own is http://www.newegg.com/Product/Product.aspx?Item=N82E16817341022

Would this be good or would another 6850 require a PSU upgrade?

You would require a new psu 650W to run another 6850.
http://www.guru3d.com/article/radeon-hd-6850-6870-crossfirex-review/4

 

[ko888]

For a system running a single Radeon HD 6850 graphics card the power supply should have a minimum combined +12 Volt continuous current rating of 24 Amps and have at least one 75W 6-pin PCI-Express power connector.

For a system running with two Radeon HD 6850 graphics cards in 2-way CrossFireX mode the power supply should have a minimum combined +12 Volt continuous current rating of 35 Amps and have at least two 75W 6-pin PCI-Express power connectors.

Your OCZ Fatal1ty Professional Series 550W (OCZ550FTY) with its maximum combined +12 Volt continuous current rating of 37.5 Amps just meets the requirement.

 

[phur]

So it seems two 6850s and a 955 would be on the edge for a 550w PSU...Anyone got some suggestions for a decent 750w PSU that is not overly expensive?

 

[davcon]

So it seems two 6850s and a 955 would be on the edge for a 550w PSU...Anyone got some suggestions for a decent 750w PSU that is not overly expensive?

XFX 750W PRO750W XXX
http://us.ncix.com/products/?sku=62224&vpn=P1750BNLG9&manufacture=XFX