Yes, the cpu speeds on NAS boxes are not like PCs.

Qnap and Synology are the usual suspects. I would focus on the amount of disks first then worry about what processorspeeds are available for that size of diskdrawer.

I assume you are looking for 4 diskdrawer or more?

DSP8000SE, DSP7200SEHC, DSP5200SE sides, DSP7200SE rears, 861v8, 210, Sim2 Ultranero 4, Stewart Cinecurve 2.35:1, XEIT CM-5E Anamorphic lens, Dune HD Duo Cinema 8K and Wireworld Platinum 48G HDMI -> UHD722 -> Shunyata Omega Ethernet. Shunyata/Furutech power-cables/filters. SR Master Fuse@861v8. Uptone Etherregen with 10MHz OCXO clock.