Topic: Two GPU's (Read 456 times)

I found the resolution.  Thanks!

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. 

Correct.

2 rigs here ...Been swapping back and forth to get a happy medium between speed and Heat.

Found this to be the best combo:

Rig one. 6870 (Monitor pluged into) & a 7970
Rig two = 6870 (monitor) & a 7870

Win7 X64 NO Crossfire (it slows the hash rate down)

The 6870 probobly is not "booting"
Plug in a monitor (it must be on) or "dummy plug" into the 6870 when booting the computer while the 6970 is still fully hooked up, Try that (doing this should not be neccessary, but some people for whatever reason need to do it)

Not meaning to hijack... but hopefully this is relevant in a Two GPU thread.

I take it that multiple video cards in a mining rig do not need to be identical nor do they need to be linked via crossfire... is this assumption correct?

Lunokhod

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

 

I have a 6970 GPU in my tower.

I recently bought a 6870 to mine with.

Both cards are powered and plugged into my MSI MoBo.

I can't seem to get the 6870 to install drivers, or be recognized by device manager.

Any help? Thanks!