Boosting DaVinci performance with NVlink, virt gpu or smthng

Using RTX 4070 with12G - 128 G RAM DDR4 on i9 10 core, with a system on intel RAID 0 from 3 NVMe Samsung 1t pro all on 590 chipset. I have second PCIe slot for GPU, and as soon as SLI is officially dead, i’ve been thinking about 4090 but, out of budget. I have an old tesla k80 lying around. Is there a way to adapt those 24g?
Mostly doing post production in 6K raw DaVinci Resolve + After effect + tons of AI stuff from Topaz labs.