serverlesslove

Hi, I'm trying to setup CM3588Plus NAS 3 x 4tb vp4300 nvme drives OpenMediaVault updated. Drives are setup to RAID5 with ext4. the OS is reporting that ssd temps getting to 63-68C while idling, and likes to creep up to 75C where if I'm correct thermal throttling starts to kick in. the SBC is in open air, no case/enclosure. room temp 21C. How to find the cause and solve it? Amy recommendations setup (change the fs) etc. Thanks a mill.