Sapphire 7870 support sleep mode ?

[fode]

Hi,

How to enable Sapphire 7870 support sleep mode ?

I changed the mode to sleep, when the wakeup the system, the system keep beeping and nothing was shown (black screen), then the system rebooted after a while.

I have no problem when I use the onboard intel HD4000.

 

[iceclock]

http://forums.guru3d.com/showthread.php?t=370281

seems like its an issue.