crossfiring 7870xt with an r9 280?

[chromenut]

Hello, i was wondering if i could crossfire 7870xt with an 280 (rebranded 7950)

since they are both tahiti.

my 7870xt can be clocked to 1200/1500 and my motherboard supports 2x PCIE 2.0x16

 

[mouse24]

Yes you can, AMD should have named the 7870xt to 7930.

 

[chromenut]

the only problem is that my PSU (chieftec 750w)

has only 2 vga/power cables

http://www.pc-specs.com/psu/Chieftec/Chieftec_CTG-750C/1166

e: on that site it says that it supports 7870xt crossfire but i dont know how the cables go.


http://www.overclockers.ua/power/chieftec-ctg-750c/07-big-chieftec-ctg-750c.jpg

current 7870xt i need to use both VGA power slots (2x6pin) the cables that come with the psu are 2x (6+2)

 

[mouse24]

the only problem is that my PSU (chieftec 750w)

has only 2 vga/power cables

http://www.pc-specs.com/psu/Chieftec/Chieftec_CTG-750C/1166

e: on that site it says that it supports 7870xt crossfire but i dont know how the cables go.


http://www.overclockers.ua/power/chieftec-ctg-750c/07-big-chieftec-ctg-750c.jpg

current 7870xt i need to use both VGA power slots (2x6pin) the cables that come with the psu are 2x (6+2)

To be honest if it only has 2x6+2 pin connectors and its claiming to be a 750w its probably junk.

It also lists its max power as 750w but the max power of the 12v rail (pretty much the only one that matters) is 54a. 12v x 54a = 648W Most if not all good PSUs list there max power as the most that 12v can output.

I can't give you any solid evidence as to the quality of the power supply but personally I wouldn't trust it with two 7870xt's.