Advice on PSU for upgraded build

Hi there,

I'm moving my Unraid build to a new chassis to support more HDDs, replacing the LSI card from 8i to 16i, and swapping the existing RTX 2070 for a 2080Ti that I have left over from upgrading my gaming PC. The full build is below

The build is the following:
Motherboard: Asus Crosshair VIII Hero Wifi
CPU: AMD 3950X
Cooler: Noctua NH-D15 (may eventually go to an aio)
Ram: 4x16gb 3600 CL16
GPU: Asus Strix 2080ti
Case: Fractal Define 7 XL
HBA: LSI 9300-16i
Fans: 4x 140mm case + 2x 140mm on D15, maybe some more later
HDDs: Eventually 16x  14TB-20TB 7200rpm (Exos or WD Red Pros) + 2x 1TB Sata SSDs, maybe 1 or 2 NVME in the future
 

The current power supply is a Corsair HX750 Platinum, which was fine for the 10 8tb 5400rpm wd reds and 2070. But with more drives + eventually all 7200rpm and the 2080ti, I think 750w might not be enough anymore.

I have a spare Corsair RM1000i Gold psu that I was thinking may be better suited to handle the increased load, but I wanted to get some opinions on that. Would be a downgrade in the rating but I think the extra watts will likely be needed for startup or heavy loads on VMs. 

Thanks

Edited December 24, 20232 yr by TacosWillEatUs