Running 3x 3090s at 100 t/s, Reddit user weighs options for adding a 4th GPU
Blues520 · reddit · 2026-10-15
A Reddit user running 3x RTX 3090s at PCIe 4.0 x16 on a Threadripper 3960X + ROG Strix TRX40-E board (only 3 PCIe slots) hits 100 tokens/s on Qwen models and wants to add a 4th 3090 for other models. Options considered: c-payne SlimSAS bifurcation to x8/x8 (expensive with shipping; cheaper Chinese alternatives unproven) or upgrading the motherboard/CPU. Also unsure whether x8 bandwidth would hurt performance, since the model seems dependent on the whole system rather than GPUs alone.
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