building 4x 4090 rig

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You are absolutely right. And to avoid such a situation, you need to use rules or use another type of attack. I'm sure the same thing will happen to you if you install your GPU in pci-e slots. And there will be no difference...

This is simply wrong. The difference between x1 lanes at 3.0 and x16 lanes at 4.0 is almost 32x faster. PCIe x1 @ 3.0 maxes out at ~1GB/s, x16 @ 4.0 can do 31.5GB/s. You can push a hell of a lot more candidates per second to your card with x16 @ 4.0 than you can with x1 @ 3.0.



I implore you to read through the FAQ link: https://hashcat.net/wiki/doku.php?id=fre...king_speed

Even on very old GPUs, the difference can be 15%+ performance loss at x1. Yes rules can latency hide by amplifying, but raw chunk load speed is still important because rules and amps are not always feasible.

Thanks for the link you wrote. the fact is that I never search with pure dictionaries. Therefore, it doesn't matter to me which PCI-E slot the GPU is installed in.

This is exactly what I wrote about. I have known about this for many years. And not from this article, but from my personal search experience.