Hardware required to run two GPUs at x16 speed

stephenschoon

Hi,
I currently have a RTX3080Ti, ideally I would have been thinking about upgrading my machine to include a RTX50XX this year but I need to use Daz Studio 4 until Daz Studio 6 reaches production status.

So the idea was to use two GPUs, a new RTX50XX to drive the display and the existing RTX3080Ti to do the rendering.

I'm not sure how of a boost IRAY would get by dedicating to RTX3080Ti to it.

Because I need both GPUs to run at x16 speed I would not be able to use consumer hardware and would have to use a workstation class CPU, motherboard and memory.
( Yes I know it would need workstation class memory, PCIe 5.0 x4 SSDs and at least a 1200W PSU, I've been building PCs for over 30 years, I'm not a beginner)

So the choice looks like either a AMD Threadripper or Intel Xeon...

I'm guessing somebody out there has already done something like this so does anybody have any advice/comments

Many Thanks
Steve Schoon.

 

Richard Haseltine

Why do they need to run at 16x? I assume this is for another application or tool, in geenral the data transfer speed does not seem to be critical for iray sonce the start up time is usually a very small part of the entire rendering process.

kpr

stephenschoon said:

Hi,
I currently have a RTX3080Ti, ideally I would have been thinking about upgrading my machine to include a RTX50XX this year but I need to use Daz Studio 4 until Daz Studio 6 reaches production status.

So the idea was to use two GPUs, a new RTX50XX to drive the display and the existing RTX3080Ti to do the rendering.

I'm not sure how of a boost IRAY would get by dedicating to RTX3080Ti to it.

Because I need both GPUs to run at x16 speed I would not be able to use consumer hardware and would have to use a workstation class CPU, motherboard and memory.
( Yes I know it would need workstation class memory, PCIe 5.0 x4 SSDs and at least a 1200W PSU, I've been building PCs for over 30 years, I'm not a beginner)

So the choice looks like either a AMD Threadripper or Intel Xeon...

I'm guessing somebody out there has already done something like this so does anybody have any advice/comments

Many Thanks
Steve Schoon.

 

If you must upgrade now then, as a very rough guide (from when going to battery power on my notebook and being notified of what's using my dedicated gpu by the mux software), I'd say around 20% utilisation is stolen by other-things than rendering. As you'll know, that's not going to equate to 20% render performance, but is prob a reasonable thumb-in-the-air. AND Once you can use 2025 full-release the switch-around (3080 to mule-duties 5xxx to rendering) might gain you more. 

I've seen a couple of folk on here post they have the threadripper... I've not seen either put they've got a 2x gpu setup but maybe they'll chime in with a review ( @crosswind ?)