Can you crossfire with GDDR5 graphics cards

[DeGibblets]

I have two graphics cards and I have not got the option in CCC for crossfire so I heard somewhere that in order to crossfire you need GDDR3 graphics cards and through limitless searching I could not find anywhere if that was true or not.
I have a ASUS Radeon HD 7850 and a Diamond Radeon HD 7870, also have a A6 apu.
also some other info Im just a clueless teen so treat me like a idiot if you'd like.I am simply asking if GDDR5 can crossfire but if someone can also answer why i do not have the option for crossfire I would be appreciated

 

[de5_Roy]

what are your full specs? don't skip anything.
are you trying to use the 7850 and the 7870 in cfx or either or both to cfx with the a6 apu's igpu?
the apus can crossfire (amd dual graphics) with select amd radeon graphics cards up to radeon hd 6670. the gddr5 versions of those cards can cfx too. but you can't cfx the a6's igpu with 7850 or 7870 - those cards are a lot more powerful than the apu's igpu.

 

[epicoverclock]

you can crossfire ggdr5 graphic cards. do you have the crossfire bridge for the HD 7850 and HD 7870,

 

[DeGibblets]

what are your full specs? don't skip anything.
are you trying to use the 7850 and the 7870 in cfx or either or both to cfx with the a6 apu's igpu?
the apus can crossfire (amd dual graphics) with select amd radeon graphics cards up to radeon hd 6670. the gddr5 versions of those cards can cfx too. but you can't cfx the a6's igpu with 7850 or 7870 - those cards are a lot more powerful than the apu's igpu.

What other specs would you like to know? and how do I check them.
Other than that. I was just crossfiring using the crossfire bridge and trying to enable the option in CCC, but the option doesn't show up if that means anything, I wasnt trying to dual graphics.

 

[de5_Roy]

What other specs would you like to know? and how do I check them.
Other than that. I was just crossfiring using the crossfire bridge and trying to enable the option in CCC, but the option doesn't show up if that means anything, I wasnt trying to dual graphics.

most importantly, motherboard brand and model, apu model, power supply and then the rest. to check if the motherboard allows cfx.

 

[DeGibblets]

What other specs would you like to know? and how do I check them.
Other than that. I was just crossfiring using the crossfire bridge and trying to enable the option in CCC, but the option doesn't show up if that means anything, I wasnt trying to dual graphics.

most importantly, motherboard brand and model, apu model, power supply and then the rest. to check if the motherboard allows cfx.

I have a Asus F2 A85-M CSM motherboard , A AMD A6-6400k Black edition (I think), and a Corsair HX 1000W power supply, 2x 2gb Patriot RAM and 1x Asus 4gb RAM

 

[lonewolf7]

You can CFx, but 7870 will clock down to match 7850. And A6 will bottleneck the GPU.

 

[de5_Roy]

I have a Asus F2 A85-M CSM motherboard , A AMD A6-6400k Black edition (I think), and a Corsair HX 1000W power supply, 2x 2gb Patriot RAM and 1x Asus 4gb RAM

according to asus' specs, the motherboard can run dual gpu crossfire. check your motherboard's bios during startup to see if both cards show up. then check if the drivers are up to date. try techpowerup's gpu-z software as well.
the cards will be quite bottlenecked by the dual core apu, though.