Problems getting r9 270 and hd7870 on crossfire, Help please!

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sundays

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Oct 15, 2013
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Hello,

I am trying to crossfire 2 cards (asus r9 270 DirectCUII OC) with and vtx3d hd7870 extreme) and i cant get the crossfire option in ccc.

I did tried full removal of drivers and new installation, tried booth cards at same time, one each time, bridge before and after, changed bridges.... I did removed and installed software about 5 or 6 times and the result always the same! crossfire option not available in ccc.

I do have an PSU from corsair (tx-750), motherboard is msi 970a -g46, an ssd (240gb) and 2 hdd disks (500gb and 750gb), also my processor is an fx8150 runing at stock speed refrigerated by water (corsair h80). 8 gb ram from patriot (4x2gb).

The cards are from same family (pitcarn), so i dont know what is wrong and getting out of solutions.

Can Anyone provide me some advice, please?

If you need additional information i can provide,

Many Thanks in advanced for time and help you may provide. Jorge
 
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sundays

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Oct 15, 2013
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I do believe the r9 270x is an 270 boosted. Therefore they are the same with different performance. Could be wrong but nothing to do with my crossfire problems. Thanks
 
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dovah-chan

dovah-chan

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Feb 5, 2014
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Yeah a 270X is just a higher binned 270 that qualified for a higher factory clockspeed out of the box.

Also I believe you have a 7870 XT. Think of it like EVGA's 670 FTW which used 680 PCB and a 680 cooler but for a 670. You may actually have a Tahiti LE card on your hands. Go check out GPUZ and see what architecture it lists it under and how many stream processors it has. (I'm talking about your VTX card just to be specific)
 
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sundays

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Oct 15, 2013
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Hi. Both cards are showing (used techPowerUp) and if I connect 2 monitors, one in each card, ccc show primary adapter as r9 270 and enabled Adapter the hd7870
 
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RobCrezz

RobCrezz

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Mar 14, 2013
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Yup, I reckon you are right.
http://www.techpowerup.com/reviews/VTX3D/Radeon_HD_7870_XT_Black/26.html


Unlucky op, if you have the above card, you cannot crossfire with 270/270x.
 
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sundays

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Oct 15, 2013
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Hi Again. No i do have a pitcaim. What show on TechPowerUp is
1st card: AMD Radeon hd 7800 Series
GPU Pitcaim
Technology: 28nm
Die Size 212 mm2
Bios version: 015.017.000.000.000000 (113-xxx-xxx)
Shaders: 1280 Unifed
Pixel fillrate: 35.2 GPixel/s
Texture Fillrate 88.0 GTexel/s
Memory type GDDR5 (elpida)
Bus width 256 Bit
Memory size: 2048 MB
Bandwidth: 179.2 GB/s
driver Version: atiumdag 14.301.1001.0 (catalyst 14.9)/win7 64
GPU Clock 1100 MHz
Memory 1400 MHz
Default Clock 1100 MHz
Memory 1225 MHz
ATI crossfire Disable
Computing and DirectCompute 5.0 marked

the 2nd card: AMD Radeon R9 200 Series
GPU Pitcaim
Technology: 28nm
Die Size 212 mm2
Bios version: 015.039.000.001.000000 (113-AD59700-102)
Shaders: 1280 Unifed
Pixel fillrate: 31.2 GPixel/s
Texture Fillrate 78.0 GTexel/s
Memory type GDDR5 (elpida)
Bus width 256 Bit
Memory size: 2048 MB
Bandwidth: 179.2 GB/s
driver Version: atiumdag 14.301.1001.0 (catalyst 14.9)/win7 64
GPU Clock 975 MHz
Memory 1400 MHz
Default Clock 975 MHz
Memory 1225 MHz
ATI crossfire Disable
Computing and DirectCompute 5.0 marked

Hope this helps
 
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sundays

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Oct 15, 2013
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Hi. I do have the x-edition, not the black edition
http://videocardz.com/33692/vtx3d-introduces-three-x-edition-models-radeon-hd7870-hd7850-and-hd7770

My HD 7870 card
http://www.techpowerup.com/gpudb/b475/vtx3d-hd-7870-x-edition.html
 
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