Adding 4th Card issues [resolved with Ubuntu 11.04 instead of win 7]

[ataranlen]

I am trying to add a 4th card to my mining rigs, but I keep running into some kind of driver issue.

And before you say search: "No results found"

I'm using 6950's, and everything works great. As soon as I boot into windows after adding the 4th card, it looks ok, but OpenCL is not working. GPU-z crashes, Guiminer Crashes, MSI Afterburner crashes with a message about "failed to connect with driver wrapper" whatever that means.

This motherboard:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813138318

These GPU's:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102921

[Clarithium]

Try using Linux, Linux supports more GPU's.  See if you encounter the same problem.

[ataranlen]

The problem with linux is getting started. I tried linux but was never able to get a miner working. (Tried with my 5870x2's, not the 6950's yet)

Edit: Alright, I tried the updated guide for 11.04, worked like a charm!

[mike85123]

Anyone able to get a 4th card working in Win7???  Is there another program out that allows over/under clocking control and fan control?

[stellan0r]

The problem with linux is getting started. I tried linux but was never able to get a miner working. (Tried with my 5870x2's, not the 6950's yet)

Edit: Alright, I tried the updated guide for 11.04, worked like a charm!

can you please point to the post-# you followed in this guide?
http://forum.bitcoin.org/index.php?topic=7514.0;all

I tried #2, but actually something must have gone wrong as phoenix could not start (some opencl issues).

How exactly do you run your miners on Ubuntu? just start them in a terminal by hand, or did you write or found an easy to understand script for that purpose?