0

Does anyone have experience with using a machine for training Deep Learning models (R-CNNs for semantic segmentation), using multiple GPUs and powering it with more that one PSU? E.g. one PSU for motherboard and one GPU only, and another PSU for a second (and more?) GPU connected to the same motherboard.

2
  • 1
    This is certainly possible. Are you looking for something professional like what you'd find in a rendering server, or something "hacky" that could be done with normal desktop PSUs?
    – Romen
    Sep 22 at 18:05
  • I will definitely start with something hacky! I may even go for an "open box", just a frame without enclosing walls.
    – Fabio
    Sep 25 at 10:02

1 Answer 1

0

for consumer home pc style ATX power supplies, you would not use more than one to a motherboard. They have the 24-pin ATX motherboard connector, for connecting to only one motherboard. If this is the kind of rig you are looking to do multiple gpu's you simply buy a 1000w or 1200w psu that supplies 4 pcie 6 or 8 pin power connectors for gpu's.

There is the enterprise route that uses rack mount type chassis and rack mount power supplies. For example a Dell R940xa, 4U in height, has 4 x 1600w power supplies; it runs on 208/240v power. They along with Supermicro you can peruse their websites to look at their offerings to get an idea of how it's done, where they can support I think up to 10 nvidia-V100 type gpgpu's (double width, like a consumer grade RTX3090, having 1x or 2x 6 or 8 pin power connectors per card)

a home built pc, using a full size tower with an ATX or extended ATX size motherboard, will accomodate 2 typical RTX-3090 cards, you just need a common ATX power supply in the 800w plus range that will provide the necessary pcie power cables to the graphics card(s). you would never use 2 psu's on one motherboard for a home pc type rig, you would get one PSU providing enough power for the hardware to be used.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.