Two different cards one motherboard

[tomi1000]

Hi
I have MSI B150 game m3 motherboard, and actually inserted radeon r9 380x 4gb.
I have one more card radeon 7850 and i want put it inside.

Can i do this? With crossfire? Without crossfire? Will it work?
Motherboard support crossfire but will this two cards work together?

Generally i want this to mine some coins and intecrease hash rate...

 

[Lutfij]

Adding the second card would be pointless since they would not be in crossfire mode. The other reason to not go ahead with your idea is that the power draw would be much much higher. In fact they would be effective at being a space heater. If anything you should look at the single most powerful card your system will be capable of powering(both from the CPU and the PSU). In this case, the R9-380x is the right choice.

Curious though, what is the make and model of your PSU as well as it's age?