It would help to tell more about your System for starters..But anyway.
I just recently built a rig. and Being from the Nvidia camp the AMD stuff is new for me. Was surprised that even tho I have swapped in and out 4 different cards on this new board they all have just worked.
Use one card get a good Driver install going. Then add in another card. I was swapping back and forth between.
1) MSI 7970
2) MSI 7870
3) XFX 6870
4) Sapphire 6870
Each time I reentered Windows it would "Found new Hardware" and ask for a restart. After restart new card would be their.
TO sum up. The drivers are already installed. When you shut down , install a card , start windows , it should find and recognize the card. It will ask for a restart.
Forget Device manager, Get and install MSI afterburner, great to clock (under\over) or just monitor temps...
Now, if your not using windows.....well you didn't say that....lol
My MoBo is a MSI Z77A-GD55. I'm using a XFX 6970 which was previously in my desktop and worked 100%. (Still working 100% with both cards in)
The new addition is a XFX 6870 which I've tried to boot the computer off of sololy (Toke out the 6970 and plugged just one monitor into the top DVI port)
I also make sure the two 6 pin power connectoers were fully plugged in.
I just tried the, one active monitor being plugged into the 6870 while the other's were still plugged into the 6970. This didn't work for me.
When I pull up system information, this is what I get under Components > Display:
Name AMD Radeon HD 6900 Series
PNP Device ID PCI\VEN_1002&DEV_6718&SUBSYS_31301682&REV_00\4&2D1605AF&0&0008
Adapter Type AMD Radeon Graphics Processor (0x6718), Advanced Micro Devices, Inc. compatible
Adapter Description AMD Radeon HD 6900 Series
Adapter RAM (2,147,483,648) bytes
Installed Drivers aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
Driver Version 9.12.0.0
INF File oem39.inf (ati2mtag_NICayman section)
Color Planes Not Available
Color Table Entries 4294967296
Resolution 1920 x 1080 x 60 hertz
Bits/Pixel 32
Memory Address 0xE0000000-0xFEAFFFFF
Memory Address 0xF7E20000-0xF7E3FFFF
I/O Port 0x0000E000-0x0000E0FF
IRQ Channel IRQ 4294967294
I/O Port 0x000003B0-0x000003BB
I/O Port 0x000003C0-0x000003DF
Memory Address 0xA0000-0xBFFFF
Driver c:\windows\system32\drivers\atikmpag.sys (8.14.1.6290, 540.00 KB (552,960 bytes), 12/19/2012 11:32 AM)
Yet, the 6870 doesn't show in device manager, nor does it show when I search for new hardware. I am currently using 13.1 CCC if that helps.
