I have been running dual 1080ti’s for a while until I recently had a water cooling leak and destroyed them. I tried ARC GPUs but that didn’t work out too well.
I picked up a single 4070 to try it out and it seems to do really well. I know a 4090 is much faster but I don’t like wearing out a single expensive card, plus I can use the 2nd for something else so I’m thinking about picking up another 4070.
Dual 1080ti’s worked just fine so I know there shouldn’t be an issue with 2 4070s but I have ran into so many random bugs with TVAI lately I figured it best to see if anyone else runs dual 40 series cards. I didn’t notice any benchmarks, maybe I missed some. I run TVAI on Linux, I know that’s not a huge thing around here but it generally runs better than Windows to be honest…it’s just a different set of bugs that crop up
You’ll need a CPU with about 20 or more cores to keep up with two 4070s. Not sure how or if using them on the same instance works. I’m only saying lots of CPU cores for if you run two instances at the same time.
Hmm a CPU bottleneck didn’t dawn on me, not something I’m used to seeing with 2 1080ti’s. A single 4070 seems to be way faster in most cases and uses way less power…like 150w to do more than 2 1080ti’s did with 500w.
20 cores actually sounds about right now that you mention it. I’m running a 5900x and I’m seeing 1300% CPU whether the GPU is maxed out or not.
I generally always ran 2 instances but I’m pretty sure both 1080s speed up a single instance. That did have an SLI bridge which I’m not sure matters.
Seems like it might still be worth doing if the CPU is stable. I’m not worried about cooling, I’ve got this thing setup to watercool over 600w of GPU and the CPU and at the moment only the CPU is on water.
Yeah TVAI is pretty CPU heavy, once you get a GPU that can run it faster.
I have a 5900X too, and can probably get a little more speed by upgrading my RAM from 3200mHz to 3600mHz.
I don’t think the SLI bridge should make a difference. I am curious what your benchmark numbers are when it set to all GPUs versus just one 1080ti?
You mean both 1080ti’s vs just a single 1080ti? I didn’t really do any benchmarks with the 1080’s but it was legit twice as fast with 2 but I always had it set up to run 2 instances. Occasionally I had to switch to single process for a high res input clip but I didn’t really try switching back to a single card ever. It was a rock solid setup but I didn’t actually realize it wasn’t very fast and was super power inefficient compared to 1 4070. I’m running probably twice as fast with a single 4070 @ under 200w than I was with 2x 280w 1080ti’s that were constantly maxed out. Like I had to exhaust this PC out of the wall because it would overcome the air conditioning.
