HELP! struggling to make 6 gpu R9 290 rig to run on windows 7 (SOLVED)

[cryptmebro]

gonna try this as soon as i get some free time dammit!

https://litecointalk.org/index.php?topic=11761.120

i can confirm that this method worked for me. now hashing at 4.8Mhps with all 6 cards! thanks to all involved!

Which part?  I've had a few glasses and don't quite know which part you are talking about.  Post number would be fine.  Thanks!

[Morbid]

gonna try this as soon as i get some free time dammit!

https://litecointalk.org/index.php?topic=11761.120

i can confirm that this method worked for me. now hashing at 4.8Mhps with all 6 cards! thanks to all involved!

Which part?  I've had a few glasses and don't quite know which part you are talking about.  Post number would be fine.  Thanks!

the very first post of the thread. there are custom driver libraries that have to be installed manually through device manager. works flawlessly now.

[Pierre3400]

Is there any confirmed method for this?

I have a 6GPU rig, running 2x 7950 and 4x 280x. I am running 13.1 drivers, as any drivers above 13.1 will kick out 2 GPU's, they will show up in Device manager, and i have heard, i just need to install them manually, but how, is a whole different ball park.

I know where AMD stores the drivers, well amlost, but how to move on from there, i do not know.

[bitcoin4-sale.com]

Can anyone help me out.  I am attempting to build a 6 GPU mining rig but I can only get windows to recognize 5 cards.  So here is my System I am running:

1x Gigabyte 990FX-UD3
6x MSI R280x
8GB PNY Ram
1x Corsair 1050 watt PSU
1x Corsair 850 watt PSU
1x AMD Sempron 145
64GB Hard Drive
Dual Power Supply Adapter
6x Powered Riser Cables

Ok so I will try to explain what's going on and hopefully someone can help me out.  In the beginning I could get windows to recognize all 5 cards, but when I started CGMINER 3.7.3 Kalroth's.  I now have 5 cards hashing away at 695 kh/s with no HW errors and about 0.6% rejected shares.  However, the problem I am having is getting Windows 8.1 to recognize all 6 cards.  I keep getting a code 43 error.  I used Windows update to download all device drivers and I am using the latest Catalyst Drivers I believe.  Does anyone have any suggestions? 

[gilad215]

You need Windows 8.1 no question about it. windows 7 is making problems with multi gpus with that number. Windows 8.1 recognizes them with no problems.

check this video, hes having the same problem

https://www.youtube.com/watch?v=WfqfEpanpig

and by the way you will need to find a way to undervolt those cards dramaticly. i had exactly those cards with the same psu.
2x290 with cx750 and i had a lot of crashes, needed to replace the psu eventualy.

good luck

[Morbid]

i believe for 6gpu in scrypt you'll need more than 8gb ram.

[repairguy]

i believe for 6gpu in scrypt you'll need more than 8gb ram.

I run 6x 270x with win7, ubuntu and bamt with 4gb, and have verified they still work with 2gb.  the 290s are roughly twice the speed, so i would guess that 4x the minimum would suffice.  I intended to build a 290 rig but haven't unboxed the gpus yet, and i am not going to loose the value of them by opening them just to verify ram, but I assume that 8gb would be fine.

[DogeNukem]

This is not a RAM, motherboard devices, Windows, sexual orientiation or dog breed preference issue.

The problem is Catalyst drivers since 12.6 or 12.8 for Windows limited the number of GPUs to 4.  Anything after that will show up with an exclamation mark.

The workaround to this is to remove any and all catalyst drivers (thoroughly).  Perhaps use TechPowerUp's cleanup utility.  Then disable verified driver installation, reboot and use modified drivers.  Final step is to manually install OpenCL.

This has worked on the three rigs I have built, every single time.  More details here, closer to the bottom of the page:
https://litecointalk.org/index.php?topic=11761.0

Cheers!

[Holm]

I am having similar issues but mine is only 2 of my 5 are showing. I have seen on many sites that Windows 7 only supports 4 gpus and you need windows 8 for more.

you should reinstall all drivers. Windows 7 is running 6 cards and better to use linux

[Morbid]

i think if he just reads this thread a bit better he'll find his answer.

[Holm]

may be he forget this question? lol