The result is confusing, whats wrong? [0.1 BTC Bounty to Fix that works]

[lightlord]

I am not sure what is wrong.

I have a motherboard that supports 3X7950 Cards, PSU with enough cables.
If I put in one of the HD 7950 cards and boot into OS, it runs and mines bitcoins perfectly fine.
Any of the HD 7950 but one in any slot works.

But as soon as I put two HD 7950 into the motherboard, putting one more. It reports 99% usage
on the second card in MSI after burner. And all mining programs crash instancely upon opening.
Cgminer says not responding, reaper says not responding, etc. No mining program works.
But everything else, like browsing the web, and stuff seems fine.

I tried reinstalling the drivers 13.1, and both reported 0% usage in msi after burner, a change.
But no mining programs work. I tried crossfire, I tried 12.8,13.3 beta, doesn't work.
I tried putting in a 3rd card nothing works.

As soon as I take out the cards, and leave in one. It works and mines perfectly.
And I tried the single card on slot 1,2,3 and still works fine.

I don't understand the problem  

I tried everything.


Computer Specs:

MSI Z77A-G45
CPU: I3-2100
Memory: 4GB DDR 3-1600 AMD EDITION.
Hard drive-500 GB western Digital.
GPU: HD 7950 MSI twin Frozr III

[lightlord]

Problem signature:
  Problem Event Name:   APPCRASH
  Application Name:   guiminer.exe
  Application Version:   0.0.0.0
  Application Timestamp:   49180193
  Fault Module Name:   StackHash_0a9e
  Fault Module Version:   0.0.0.0
  Fault Module Timestamp:   00000000
  Exception Code:   c0000005
  Exception Offset:   00000000
  OS Version:   6.1.7600.2.0.0.256.1
  Locale ID:   1033
  Additional Information 1:   0a9e
  Additional Information 2:   0a9e372d3b4ad19135b953a78882e789
  Additional Information 3:   0a9e
  Additional Information 4:   0a9e372d3b4ad19135b953a78882e789


 Problem Event Name:   APPCRASH
  Application Name:   cgminer.exe
  Application Version:   0.0.0.0
  Application Timestamp:   514557a8
  Fault Module Name:   StackHash_0a9e
  Fault Module Version:   0.0.0.0
  Fault Module Timestamp:   00000000
  Exception Code:   c0000005
  Exception Offset:   00000000
  OS Version:   6.1.7600.2.0.0.256.1
  Locale ID:   1033
  Additional Information 1:   0a9e
  Additional Information 2:   0a9e372d3b4ad19135b953a78882e789
  Additional Information 3:   0a9e
  Additional Information 4:   0a9e372d3b4ad19135b953a78882e789


This error occurs when I try to install AMD-APP SDK V2.8



AMD APP SDK DeveloperFinal Status: Success
Version of Item: 2.8.1016.5
Size: 2 Mbytes
AMD APP CPU SDK RuntimeFinal Status: Success
Version of Item: 2.8.1016.5
Size: 28 Mbytes
AMD APP SDK SamplesFinal Status: Fail
Version of Item: 2.8.1016.5
Size: 130 Mbytes
 

Other detected devices
 
Manufacturer Advanced Micro Devices, Inc.
Device ID 0xaaa0
Vendor ID 0x1002
Class Code 0x040300
Revision ID 0x00
Subsystem ID 0xaaa0
Subsystem vendor ID 0x1462
 

Error messages
Application Install: install package failure!
 

[Hadez]

Kdbsync can be an asshole....

Had similar issues on a system that had an ATI card in it previously and I then upgraded to 2 x 7850's.
Can only assume it doesn't remove everything and causes a driver conflict of some sort.

Can you try....

Open Control Panel>Programs and features
Click on AMD Calayst Install Manager then click Change
Click Next on the welcome screen
Click Uninstall Manager then click Next
Click Custom then Next
Check box next to AMD APP SDK Runtime then click Next
Click Finish

Then try reinstalling the SDK from scratch.


Let me know how you get on.

[DastanX]

most likely ur card broken. remove one of the working cards and replace it with ur issued card when still errors ocur you know why

[dethdeks]

i know its a pain in the ass but have you tried doing a fresh install of windows and the 13.1 drivers? this has fixed the issue for me