Nice idea, but something has gone very wrong here:

>Sequential throughput: ~1.3 GB/s

[on a RTX 3070 Laptop]

This RTX 3070 chip is on PCIe 4.0 x16 which should give 64GB/s. The 8GB of GDDR6 is 448GB/s.

Swapping to an NVMe drive would be twice as fast, but with higher latency.