Multi GPU Support

Questions and Answers : Getting started : Multi GPU Support
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Profile Eric Davalos
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Message 1922177 - Posted: 2 Mar 2018, 19:34:09 UTC

I’m trying to set up 8 GPU one system
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Profile Jord
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Message 1922181 - Posted: 2 Mar 2018, 20:05:05 UTC - in response to Message 1922177.  

Good luck!

If you want help, you'll have to give a lot more information.

Operating system.
Brand/models of the GPUs.
PSU.
Drivers.
Just basic information which helpers shouldn't have to ask for.
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Message 1922183 - Posted: 2 Mar 2018, 20:23:56 UTC - in response to Message 1922181.  
Last modified: 2 Mar 2018, 20:36:44 UTC

Ok

I got this ASRock H110 Pro BTC+ 13GPU Mining Motherboard
With a i7-7700k

Windows 10

Either AMD or Nvidia GPUs
And risers cards

don’t know about the power supply
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Message 1922390 - Posted: 3 Mar 2018, 10:26:20 UTC - in response to Message 1922183.  

I see. Well, you would need risers to be able to use all those slots, as with any GPU being a double slot, else you'd only be able to place 6 of them. 6 being enough already for most. Can you even get any GPUs where you live? What with the cryptocurrency mining, around here there's only the lowest cards available, top ones are unavailable or hyper-expensive.

Therefore, do you have any idea how many GPUs you want to use, and which ones?
If your question is if BOINC supports it, then yes, it does.
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Message 1922580 - Posted: 3 Mar 2018, 23:01:09 UTC - in response to Message 1922390.  
Last modified: 3 Mar 2018, 23:07:44 UTC

I see. Well, you would need risers to be able to use all those slots

And they would need to be powered risers.

And depending on the video cards used, you will need several high capacity PSUs (Power Supply Units).
Crunching Seti doesn't require a lot of system RAM, but for such a system i'd suggest populating all memory slots with high speed, low latency 2GB or 4GB DIMMs.

And the current SoG application (the best if running Windows) requires 1 CPU core (thread) for each GPU WU being processed, so with that CPU you will only be able to support 7 GPUs (7 threads for the GPU support, 1 thread for general system use).
To support more GPUs, you would have to use a Core i9 CPU (if the motherboard supports them). And they are dammed expensive.
Grant
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Message 1922650 - Posted: 4 Mar 2018, 3:36:17 UTC - in response to Message 1922580.  
Last modified: 4 Mar 2018, 3:38:07 UTC

Windows 10 is able to support Eight graphics cards I think of using 4 amd
And 4 Nvidia cards
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Message 1922676 - Posted: 4 Mar 2018, 7:35:35 UTC

Don't mix families. Given you are building a crunching monster stick with 10xx nvidia cards as the applications are more productive.
Bob Smith
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Message 1922689 - Posted: 4 Mar 2018, 11:05:13 UTC
Last modified: 4 Mar 2018, 11:05:35 UTC

very basic guide from Asrock ^^ https://www.asrock.com/microsite/H110ProBTC+/
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Message 1922724 - Posted: 4 Mar 2018, 16:09:06 UTC - in response to Message 1922580.  

Crunching Seti doesn't require a lot of system RAM, but for such a system i'd suggest populating all memory slots with high speed, low latency 2GB or 4GB DIMMs.
That motherboard only has 2 memory slots, with a maximum of 32GB.

@the basic guide from Asrock...
Total power supply up to 2400W, watch out what you buy here. 2x 1,200W may be cheaper than one 2,400W.

Wonder what this means though:
13*AMD/8*AMD + 5*NVIDIA graphic cards., would that mean the motherboard can only take 13 AMDs, or 8 AMDs plus 5 NVIDIA? It can't take all NVIDIA?
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Message 1922885 - Posted: 5 Mar 2018, 9:50:20 UTC - in response to Message 1922724.  
Last modified: 5 Mar 2018, 10:00:44 UTC

Crunching Seti doesn't require a lot of system RAM, but for such a system i'd suggest populating all memory slots with high speed, low latency 2GB or 4GB DIMMs.
That motherboard only has 2 memory slots, with a maximum of 32GB.

So i'd suggest 2*4GB DIMMs, high clock speed, low latency- but only as good as the CPU/motherboard will support. No need to pay for better if it can't use it.
Grant
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Message 1922886 - Posted: 5 Mar 2018, 9:51:35 UTC - in response to Message 1922650.  

Windows 10 is able to support Eight graphics cards I think of using 4 amd
And 4 Nvidia cards

With that CPU, and the SoG application, you will only be able to run 7 GPUs maximum. You will need 1 CPU core for the system.
Grant
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Message 1922897 - Posted: 5 Mar 2018, 11:56:10 UTC

Don't bother with the AMD GPUs, for SETI they are nowhere near as productive as the Nvidia 10xx series - four (or five) GTX1070(ti) would be a good starting point, four GTX1080(ti) would be better, but the cost would be about double. Unlike mining SETI (and I think most BOINC based scientific projects) works best when you have a homogeneous set of GPUs, not running Crossfire, SLI or other GPU connection technologies.
Bob Smith
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Questions and Answers : Getting started : Multi GPU Support


 
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