Monitor on sleep when i crossfire 2 hd 5870

[fullmd]

hi , got a problem on crossfire.When i connect 2 hd 5780 monitor stop working any idea what may cause this?

 

[opexx]

can you elaborate...

 

[megamanx00]

The cause is you didn't list your full system specs and your description is too brief

Could be you didn't connect the crossfire bridge, or that your PSU or too weak, or one of your cards is just broken

 

[fullmd]

well the cards working fine seperatly but when i crossfire them (with bridge) the is no signal , just bought 800 watt power supply still no signal.

Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz
penryn1600sli-110db motherboard
windows vista 64 bit

 

[opexx]

vista... >_< ew... make sure you have the most up-to-date drivers.

 

[fullmd]

ok
both cards are xfx radeon hd 5870 is just one is black edition

 

[fullmd]

Operating System
MS Windows Vista Home Premium 64-bit SP2
CPU
Intel Core 2 Quad Q9550 @ 2.83GHz 37 °C
Yorkfield 45nm Technology
RAM
8.0GB Dual-Channel DDR2 @ 266MHz (4-4-4-12)
Motherboard
Penryn1600SLI-110dB (CPUSocket) 41 °C
Graphics
L22W-8 @ 1680x1050
ATI Radeon HD 5800 Series
Hard Drives
977GB Hitachi Hitachi HDT721010SLA SCSI Disk Device (RAID)
Optical Drives
LYBUZ DUNODQR SCSI CdRom Device
Audio
ATI High Definition Audio Device

 

[benski]

Your motherboard supports SLI, not CrossfireX. You will need a new motherboard probably. I've heard there are some software hacks to get crossfire to work on an SLI board and vice versa, but I have no experience with this myself.

 

[fullmd]

Your motherboard supports SLI, not CrossfireX. You will need a new motherboard probably. I've heard there are some software hacks to get crossfire to work on an SLI board and vice versa, but I have no experience with this myself.

thanks,i thougt about that.