NVIDIA RTX 4090 PCIe 3.0 vs. 4.0 x16 & '5.0' Scaling Benchmarks
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This testing is for PCIe generations on the NVIDIA RTX 4090 GPU. We're benchmarking PCIe 3.0 x16 vs. PCIe 4.0 x16 vs. PCIe "5.0" x16 (but the 4090 doesn't support 5.0, so it's just 4.0 -- still worth showing for educational purposes). Remember that PCIe 3.0 x16 is equal to PCIe 4.0 x8, so if you're wondering if the RTX 4090 behaves differently on PCIe 4.0 x8 vs. x16, these two tests would answer that. We're doing testing on an Intel i7-12700KF, which is Gen5-ready but again, if the device isn't Gen5, that doesn't matter. If you're wondering about AMD vs. Intel for the RTX 4090, strictly from a PCIe standpoint, it doesn't matter at this point -- they're the same in that regard. Other factors are more important, like CPU performance in the applications you run (see our CPU reviews for that).
One correction of an off-hand remark at 4 minutes 25 seconds - the RX 6500 XT has 4 PCIe lanes (Gen4), not 8. We forgot how much of a piece of trash that card was, sorry. Our mistake for not double-checking.
Watch our video about the melting RTX 4090 12VHPWR cables here: https://www.youtube.com/watch?v=EIKjZ1djp8c
See our RTX 3080 PCIe scaling video here: https://www.youtube.com/watch?v=0DKVVtirNM8
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TIMESTAMPS
00:00 - PCIe Bandwidth Testing
01:15 - Explaining PCIe Support
04:25 - Correction: 6500 XT has 4 lanes, not 8
04:58 - Maximum Theoretical Bandwidth
05:50 - Benchmarking PCIe Bandwidth (Only)
07:23 - Total Warhammer Gaming Benchmarks (4K)
08:08 - Major Outlier with Interesting Results
09:28 - Tomb Raider - 4K & 1440p PCIe Bandwidth Results
10:05 - FFXIV, Rainbow Six Siege (4K, 1440p, 1080p), & Strange Brigade
11:14 - Conclusion
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Host, Testing: Steve Burke
Video Editing: Mike Gaglione, Andrew Coleman