6990 Doesn't want to mine??

[RenVilo]

Hi guys,

new on the forum. Hoping someone can help me out.  I had a 7970 in my pc and in the process of changing hardware so that I can mine Litecoins. The 7970 works fine. Now I installed 1x 6990 and it doesn't do anything. I tested it in my other rig and works fine. 

So first let me explain with GUIMiner:

Host: ltc.give-me-coins.com
Port: 3334
Username: ****.1
Password: ****
Thread Concurrency: 8000
Worksize: 256
Vectors: 1
Intensity: 13
GPU Threads: 1

When I say start the console only shows this:

Running command: "C:\guiminer-scrypt\cgminer\cgminer.exe" --scrypt -u ****.1 -p ***** -o stratum+tcp://ltc.give-me-coins.com:3334 --gpu-platform 0 -d 1 -w 256 -v 1 -I 13 -g 1 -l 1 -T  --thread-concurrency 8000

Listener for "LTC Mining" started

and in the summary screen this worker only shows up as connecting?


Now via cgminer. This is my script:


C:\cgminer\cgminer.exe --scrypt -o stratum+tcp://ltc.give-me-coins.com:3334 -u ****.1 -p *** -I 13 -g 2 --lookup-gap 2 -w 256 --thread-concurrency 20992 --auto-gpu --temp-cutoff 95

the cmd box will open and show
"
Started cgMiner 3.5.0
"

and then it closes. No errors or anything.

Like I said it, with my other rig with the same settings and the same router it works fine.  The only difference between the 2 pc's are the OS and the motherboards.  PC that it works on has:

Asus board
650w PSU
Windows 7

PC it doesn't work on has:

Gigabyte board
650w PSU
Windows 8.1

I've tried several things but nothing seems to fix this. Please assist as I'm looking to get more 6990 GPU's

[balanghai]

good thing yours doesn't experience blue screen of death. 

What's your GPU and MEM clock? also your voltage?

Try Multiminer or Guiminer. It helps your for a start.

[Ritual]

Given the size of the power supply, that would be my first suspicion. 6990s are dual GPUs and VERY power hungry. Would have thought 600W would be OK for a single card tho...

Might be worth checking nevertheless.

Rit.