2x NVIDIA RTX 3090 SLI Benchmarks: 500FPS, 700W, & Limited Support

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This benchmarks multi-GPU with the RTX 3090 video cards, testing SLI with a new NVLink bridge, an EVGA 3090 FTW3, and an NVIDIA Founders Edition card. It's not easy to set up, but it does work.
Sponsor: Team T-Force Cardea C440 on Newegg ()

Watch our RTX 3090 review here:
Watch our RTX 3090 Founders tear-down here:

The biggest challenge getting SLI to work with two RTX 3090s was aligning the bridges. You really need to get the same card for ideal mating, because the SLI fingers are not standardized for placement and can be misaligned. Because of this, we ran a second test bench (no motherboard on that one) with PCIe risers, then a whole mess of mounting hardware. It took about 4-6 hours to get it all built and functional, but it worked well once assembled. Of course, we would never recommend this setup, but it was a "because we can" and "let's see what it does" approach. Also #ripjay


00:00 - Struggles to Set Up
01:35 - State of Multi-GPU Support
03:41 - Total Hackjob SLI 3090 Insane Setup
05:55 - Water Block & Fitting Issues
09:44 - RIPJAY Just Really Quickly Because Why Not
10:50 - Strange Brigade Vulkan 90%+ Scaling in SLI 3090s
12:40 - Strange Brigade Dx12 Scaling
13:10 - Red Dead Redemption 2 VLK SLI Benchmarks with RTX 3090s
14:00 - Red Dead 2 Dx12 SLI Does Not Work
14:25 - Hitman 2 Does Not Work
14:40 - Shadow of the Tomb Raider SLI RTX 3090
15:44 - Quake II RTX SLI Benchmarks RTX 3090
16:40 - Power Consumption Discussion
17:45 - Conclusion


Here's our airflow photography of how the Founders Edition cooler behaves:
Watch the RTX 3080 review here:
RTX 3080 FE Tear-Down:
Previous 3080 review article:

Watch our NVIDIA Ampere GPU Architecture Deep-Dive:
$13K of our New GPU Testing Methodology Equipment:

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Editorial, Testing: Steve Burke
Video: Keegan Gallick, Andrew Coleman
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