Thread 'GPU number when having multiple GPU's'
Message boards : BOINC client : GPU number when having multiple GPU's
Message board moderation
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 Send message Joined: 23 May 11 Posts: 108 
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I've noticed BM and SIV says GPU 0 for my 5850 and that is located in my slower PCIE slot, X4 slot. My 5970(2GPU's) are located in fast PCIE slot X16 SIV counts the first GPU as (1) BM counts the first as (2) I can tell when only running 1 task the 5970(2GPU's). Then I wonder which program gives the correct device number. SIV or BM?? ID: 48615 ·  |
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Send message Joined: 23 May 11 Posts: 108
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My logic says. PCIE X16 are primary and GPU should start with 0 or 0 and 1(if having a dual gpu attached to it). The slower(secondary) card should be numbered with 1 or 2 when having single gpu card attached to it. I dunno if this has any impact on the different program languages used to create apps though.... ID: 48616 · |
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Send message Joined: 23 May 11 Posts: 108
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(note) It may be the driver that assigns the number and then it is a AMD/ATI issue.... ID: 48617 · |
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Send message Joined: 23 May 11 Posts: 108
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Catalyst is numbering PCIE X4 5850 card as 0 And Catalsyst also numbers GPU 2 as the number the task is running on. So I guess BM assigns the correct number. I'll try get a note to SIV people about this. I've connected my monitor to both cards but I am using the slower PCIE X4 slot as primary screen adapter. Maybe that's why it says GPU(0) ID: 48618 · |
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