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Author Topic: limitations on gpu's per motherboard  (Read 1589 times)
Bloodsmoke
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February 10, 2012, 05:54:10 PM
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Is their any limitation on how many gpu's can be used on a single motherboard besides physical slots.  For instance could a linux OS be running 8 5970s on one Big Bang Marshal motherboard for 16 total gpus and 5+ghash?  I have a small mining rig that I want to upgrade and would like to have the ability to expand as funds become available.  I realize the power requirements would make this a 2 power supply setup at least.
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matthewh3
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February 10, 2012, 05:56:50 PM
 #2

Is their any limitation on how many gpu's can be used on a single motherboard besides physical slots.  For instance could a linux OS be running 8 5970s on one Big Bang Marshal motherboard for 16 total gpus and 5+ghash?  I have a small mining rig that I want to upgrade and would like to have the ability to expand as funds become available.  I realize the power requirements would make this a 2 power supply setup at least.

Most mining software has no limitations on the amount of GPU's mining as far as I know.

Bloodsmoke
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February 10, 2012, 05:57:53 PM
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thanks!
matthewh3
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February 10, 2012, 05:58:21 PM
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thanks!

np

elrodvoss
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February 10, 2012, 06:00:34 PM
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This biggest limitations that I have come across (other then slots)are:

  • Available power per circuit breaker
  • Generated Heat
  • Air Flow

You can get into FPGAs, but then cost rises alot.


sunbreak
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February 10, 2012, 06:13:32 PM
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This biggest limitations that I have come across (other then slots)are:

  • Available power per circuit breaker
  • Generated Heat
  • Air Flow

You can get into FPGAs, but then cost rises alot.



Don't forget the ATI driver limit of 8 gpu's... that is a show stopper.

So currently max 8 gpu's ... so a max of 4 dual gpu cards or 8 single gpu cards.

Most people who have pushed this can get 6 single cards in a 890FXA-GD70 using 5 16x->16x extenders and a single 1x->16x extender. The power supply requirement would be huge ... depending on the card ...

But for example 6 gpu's needs at minimum a very good quality 1200 watt PSU. Like a Seasonic 1250 or an Antec TPQ-1200 ...
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