Crossfire help needed ATI Radeon HD 5670's chipset

[jhart]

I recently purchased 2 ATI 5670 1GB pcie vid-cards, and 1 XFX AMD xfire bridge.

While attempting to setup the crossfire, I notice that after running GPU-z - one of the cards is reading as an ATI Radeon HD 5760 with the "Redwood" chipset and the other as a ATI Radeon HD 5600/5700 with the "juniper" chipset.

Since I have never setup a Xfire system before, but from my understanding as long as the cards are from the same series the Xfire would work. ie both card are "HD 5670". Does the chipset matter in this case or is there something I am missing. I have tried: uninstalling the software, installing 1 card w/ software, 2 cards w/ software no bridge, 2 cards w/ software and brige.


GPU-z output:
Name: ATI Radeon HD 5670
GPU: Redwood Revision:
Technology: 40 nm Die Size: 104 mm²
BIOS Version: 012.020.000.009.000000 Device ID: 1002 ‐ 68D8
Bus Interface: PCI‐E 2.0 x16 @ x8 2.0 Subvendor: ATI (1002)
ROPs: 8 Shaders: 400 (DX 11.0)
Pixel Fillrate: 6.2 GPixel/s Texture Fillrate: 15.5 GTexel/s
Memory Type: GDDR5 Bus Width: 128 bit
Memory Size: 1024 MB Bandwidth: 64.0 GB/s
Driver: atiumdag 8.831.2.0 (Catalyst 11.3) / Win7 64
GPU Clock: 775 MHz 1000 MHz
Default Clock: 775 MHz 1000 MHz

------
Card Name: ATI Radeon HD 5600/5700
GPU: Juniper Revision:
Technology: 40 nm Die Size: 170 mm²
BIOS Version: 012.020.000.005.034524 Device ID: 1002 ‐ 68B9
Bus Interface: PCI‐E 2.0 x16 @ x8 2.0 Subvendor: ATI (1002)
ROPs: 8 Shaders: 640 (DX 11.0)
Pixel Fillrate: 6.2 GPixel/s Texture Fillrate: 24.8 GTexel/s
Memory Type: GDDR5 Bus Width: 128 bit
Memory Size: 1024 MB Bandwidth: 64.0 GB/s
Driver: atiumdag 8.831.2.0 (Catalyst 11.3) / Win7 64
GPU Clock: 775 MHz 1000 MHz
Default Clock: 775 MHz 1000 MHz

CPU Specs:
GIGABYTE GA-MA790GP-UD4H AM3/AM2+/AM2 AMD 790GX
RAIDMAX HYBRID 2 RX-730SS 730W ATX12V V2.2/ EPS12V SLI Ready CrossFire Ready
AMD Phenom II X4 940 Black Edition Deneb 3.0GHz Socket AM2+ 125W Quad-Core
G.SKILL 8GB (4 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500)

PSU has proper voltage - Memory not an issue, processor doesnt even break a sweat under full load, ram is oc'd to specs

 

[jyjjy]

You can only crossfire cards built on the same processor. Unfortunately you have two different versions of the HD5670 which are built on different cores so you won't be able to crossfire. The Juniper card is the rarer updated version of the HD5670 and is slightly faster because of the extra shaders. It should overclock quite a lot as well(the processor is the same as in the HD5750/70.)
Is there a reason you decided to purchase 2 HD5670s rather than a more powerful single card? Two HD5670s should be about $150 and for that money you can get a GTX 460 768mb like this one;
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127519
It will easily beat crossfired HD5670s without the need to deal with crossfire profiles/scaling issues. It has great cooling and should overclock a huge amount if you are willing to do so.

 

[jhart]

Thanks for that, Actually i got them on a great sale from new eggs and was only $90 for both. Thus my eagerness for the crossfire.. I guess its RMA time. Thanks.

 

[jyjjy]

That is quite a deal. You could ebay instead of RMA and actually make money.
Perhaps try overclock the Juniper card and see if you find the performance acceptable and sell the other?

 

[jhart]

Best answer selected by jhart.