Games not running when crossfire enabled

[Checking 78]

Power supply 1000 watt. Processor: Intel (R) Core (TM) i7-4820K @ 3.70 GHZ. Operating system: Win 7 Ultimate. 64GB RAM. Video cards are AMD Radeon 7850 and 7870 coupled with a dongle cable.
When trying to play either Sleeping Dogs or Sniper Elite V2 with the crossfire enabled, the computer crashes, bringing up the blue screen, resulting in a restart. I am able to play either game with crossfire disabled. All other games etc. either downloaded or played from an installed disc work with no problem either when crossfire is enabled or disabled. Anyone run into this situation? Thanks.

 

[glen 20]

Power supply 1000 watt. Processor: Intel (R) Core (TM) i7-4820K @ 3.70 GHZ. Operating system: Win 7 Ultimate. 64GB RAM. Video cards are AMD Radeon 7850 and 7870 coupled with a dongle cable.
When trying to play either Sleeping Dogs or Sniper Elite V2 with the crossfire enabled, the computer crashes, bringing up the blue screen, resulting in a restart. I am able to play either game with crossfire disabled. All other games etc. either downloaded or played from an installed disc work with no problem either when crossfire is enabled or disabled. Anyone run into this situation? Thanks.

the 2 cards you are running arnt the same you need a 7850 and a 7850 not 7850 and 7870 the bios need to be the same or it wont work

 

[Checking 78]

Power supply 1000 watt. Processor: Intel (R) Core (TM) i7-4820K @ 3.70 GHZ. Operating system: Win 7 Ultimate. 64GB RAM. Video cards are AMD Radeon 7850 and 7870 coupled with a dongle cable.
When trying to play either Sleeping Dogs or Sniper Elite V2 with the crossfire enabled, the computer crashes, bringing up the blue screen, resulting in a restart. I am able to play either game with crossfire disabled. All other games etc. either downloaded or played from an installed disc work with no problem either when crossfire is enabled or disabled. Anyone run into this situation? Thanks.

the 2 cards you are running arnt the same you need a 7850 and a 7850 not 7850 and 7870 the bios need to be the same or it wont work

 

[Checking 78]

Thanks for the reply glen 20. It is just the two mentioned games: "Sleeping Dogs and Sniper Elite V2" that will not run. These both come from the "Steam" site. Any other games or programs I have installed outside of their site, I am able to leave the crossfire enabled. My initial thought is there is a problem in the development of those games. I am not able to get any support back from the "Steam" site. Viewing their trouble shooting section and suggestions has not fixed the problem. Any other information I receive is as long as I'm running in the 7800 series, but not one in the 7800 series and the second in say a 7900 series crossfire enabled should work. Thanks again. All suggestions and advice is greatly appreciated.