Quote from: ollebolls on January 20, 2014, 03:32:53 PM

Quote from: cryptmebro on January 19, 2014, 09:49:21 PM

Quote from: pontiacg5 on January 17, 2014, 12:16:33 AM

Quote from: ABitcoinBrain on January 16, 2014, 11:12:25 PM

Quote from: pontiacg5 on December 21, 2013, 04:33:40 PM

Quote from: miztaziggy on December 21, 2013, 03:17:53 PM

Hi,

Did you get to the bottom of this?

I am having exact same problem, need Windows 8 maybe? Does it work?

I have no experience at all with Linux and there are no easy step by step guides to follow Sad

If you are using 6 of any 200 series cards you have to use linux. The beta drivers you have to use for R9 cards don't support more than 4, even in windows 8. It is a driver limitation, not hardware, as 6 work perfectly fine in linux.

R9 cards won't mine on anything but the 13.11 beta drivers, it's not possible to use modified 79xx series drivers to get 6 working in windows (yet, give it time...)

Five card r9 290x rig running in windows 8.1 is good just had to switch pci latency over

That was posted a long time ago, and you still won't get 6 in wondows.

I can run 3x Sapphire R9 290 Tri-x , 1x Sapphire 280x Toxic, and 1x 7950 in Windows 8.1 just fine, but in Windows 7 I get Code 43 on the 7950 (if I put another 280x in there I still get the Code 43) no matter what I do. 13.11 beta, 13.12 both work in Windows 8.1, but in Windows 7 I can only get 4 cards going. Fucking sucks. AMD needs to work this shit out. And of course, in Win 8.1 my GPU mapping is so screwed up I don't even want to waste my time trying to fix it.

Hey

I noticed that there is an issue running 7950/290 with 280X card in the same rig. The issue lies with the gpu threads setting. Basically both the 7950 and the 290 prefers 1 thread but the 280x prefers 2. Running 290 with 7950 works great, with just different settings on the intensity, shaders and everything else but running with a 280X in the same rig is not something that I would recommend. You can run multiple instances of cgminer on the same rig, but I dont really recommend that either...

I would put the 290 and the 7950 in one rig, and sell the 280X or swap it with another 7950 or a 290 to get a more stable rig.
Also, if you are not using riser cables that are shielded, that could also be an issue with EMI between the cards. You can buy aluminium tape to shield the cables and make sure the cables don't physically touch each other.

Also, remember that the 290 is a quite new card so it requires later versions of drivers, that can also be an issue if you run on older set of drivers, as some other guide sometimes suggest. I.e you have to run this version, with this version of sdk etc. I think that is just bullshit. AMD releases new drivers for a reason, not to make the cards perform worse.

I prefer using the newest drivers, since I have seen they provide the most stable configuration. I run both on Ubuntu and Windows 7 without any issues, but I have heard people having issues with more cards due to EMI or bad riser cables.

I had a really strange issue with one rig, where two of the 290 cards worked fine but the third didnt, and it stopped after a while. I then switched to 1X->16X powered risers, and connected two of the cards to the 1X and one to the 16X and the problem dissappeared.

Check my guide out in the previous post, if you fancy trying Ubuntu and want to run it on a USB stick instead of on a HDD and Windows.

Thanks for your reply.

I can run 3 290's and one 280x on the same machine by using the "--device=" command, so that isn't an issue for me. The issue lies with windows itself. CGminer won't even recognize the 5th card because windows won't assign it resources. Windows would only show 4 until I did the trick where you short the pci slot. I have tried different types of 16x-16x risers and 1x-16x powered risers in different slots and different cards. I always seem to get the Code 43 in device manager. Currently, the 7950 has the Code 43. When I swapped the 7950 out for another 280x from my other system, the 280x picked Code 43, while the original 280x still worked fine.

It has to be a driver issue because I see people running 6 and 7 cards, and I'm through trying to figure it out. Everything works fine in windows 8.1 except for my gpu mapping, it's all fucked up so I don't use Win 8. Not dealing with that. Hopefully a driver update from AMD will fix the Code 43 in win 7. I want to call and see if I can speak to someone at AMD who know what's going on, but I don't know if that would get me anywhere. Over to Linux for now.