Different GPUs, One System.
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I currently have 3 x 5970’s plugged into an Intel DP55 board. I have just ordered an R9-290 and wanted to know what the chances are of it working with the 5970’s? Does the current ATI graphics driver support both cards? Has anyone else done anything similar? I have another system i could use, but it would be convenient for this card to go in my existing rig.
Cheers all!
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I’ve a 6670 and a 6950 running on the same machine under linux.
No problems at all and both cards are running stable.
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Thanks for the reply, i suppose i can only try. Your 2 cards are the same product family though so i think the drivers are the same.
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i have a r9 290 and a 7870 running in one system and the same set up in another system. Works just fine. You might need to do the vga dummy if you are seeing super low hash rate
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Ok Thanks mate, i will try and report back.
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Well i had a successful evening yesterday. I put a dead 5970 in the oven and it works now! My new R9 290 arrived today and i have now got 5 cards on one system. I upgraded the AMD drivers and both cards seem to use the same driver. Only thing is as the 5970’s are dual GPU cards 4 cards show as 8 GPUs in Windows, so adding a 9th card (the R9) makes the driver crash on start up. At them moment i have disabled one of the 5970 GPUs in safe mode and can now boot and see 7 5970’s and 1 R9 290. I remember reading somewhere that the AMD driver will only see up to 8 cards. I still have some tuning to do, and i want to build my rig into a 19" rack unit soon, so that i can add more R9’s. Any way, heres a pic and if anyone has got more than 8 GPUs running on one system i would be interested to know how!
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I can’t see the pix, but at least your computer is working
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This is an interesting thread, I have moved it to Mining.
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Nice work, Rob. Which version of Windows?
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Your 5970’s will work best with a single cpu thread, and the 290x with a dual core gpu thread. I’ve not managed to mix my single core and dual core cards, only running all on single or all on dual.
Had any luck with that?
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[quote name=“Undone” post=“53409” timestamp=“1390149971”]
Nice work, Rob. Which version of Windows?
[/quote]Thanks, its Windows 7 pro x64.
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[quote name=“mattmct” post=“53430” timestamp=“1390157757”]
Your 5970’s will work best with a single cpu thread, and the 290x with a dual core gpu thread. I’ve not managed to mix my single core and dual core cards, only running all on single or all on dual.Had any luck with that?
[/quote]I don’t really know what you mean by this. I set Cgminer to use 8 sets of settings. For example:
,
“intensity” : “19,19,19,19,19,19,19,19”,
“vectors” : “1,1,1,1,1,1,1,1”,
“worksize” : “512,256,256,256,256,256,256,256”,Will be very interested to know of a better way of doing it.
Cheers
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Also, another thing i came across which is interesting is, when i run the system with 2GB Ram cgminer won’t run, the window closes after 2 seconds or so. When i add another 2GB it runs fine. People have said in the past that RAM isn’t important to mining but i think my findings may suggest otherwise. At the moment the system has 8GB and is working fine. Task manager says that memory usage is about 1.3 GB in total.
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I’ve tried to make 290s work with 7970s and came to the conclusion that while perhaps not impossible, it is a royal PITA. Running 2 instances of cgminer with different thread settings simply crashes the driver. Within the same instance you can’t run different threading and the different cards like different settings to get decent hashrates. Before this, I was also unsuccessful getting a 6950 to hash alongside 7970s by the way. Couldn’t get even one of them to hash in a single instance. Homogenous rigs really are by far the most efficient, it seems.
How much memory you need depends on the thread concurrencies. At 8192 my 7970s are happy with 2GB RAM, but the much higher optimal concurrencies for the 290 bumps that number to 8GB.
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[quote name=“JCviggen” post=“53459” timestamp=“1390165723”]
I’ve tried to make 290s work with 7970s and came to the conclusion that while perhaps not impossible, it is a royal PITA. Running 2 instances of cgminer with different thread settings simply crashes the driver. Within the same instance you can’t run different threading and the different cards like different settings to get decent hashrates. Before this, I was also unsuccessful getting a 6950 to hash alongside 7970s by the way. Couldn’t get even one of them to hash in a single instance. Homogenous rigs really are by far the most efficient, it seems.How much memory you need depends on the thread concurrencies. At 8192 my 7970s are happy with 2GB RAM, but the much higher optimal concurrencies for the 290 bumps that number to 8GB.
[/quote]Interesting thanks for sharing.
I think in time i will get another mobo and start a R9 290 rig. With the 4 5970s i was getting a little over 3 Mh/s, so with the 290 i would expect 3.8 -3.9 Mh/s. As below i am getting about 3.3, but i am down around 375 from the one disabled 5970 core. So i don’t think i am that far off the mark really. Over clocking the R9 seems to make little difference. And i am not to keen on trying the unlock to 290x bios hack as its a new card, and not sure its worth the risk/hassle for 100 Kh/s.
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