That sounds like it must have been under extreme load?
Mines sitting at 45C currently, under the heatsink that comes with my X570 AOROUS XTREME (top slot). FireCuda 520 is sitting at 44C and Crucial P5 at 46C which has a shared heatsink that touches the chipset too. I have pretty poor case airflow too and dump all the heat from my radiator into the case, I know, bad bad bad, but it works.
They will perform at full speed until you bench them simultaneously I think. Then if there is a decrease it would be apparent as the bandwidth would be divided evenly. At least this is how it works on my motherboard.
Hmm, yeah, if I run CDM across all 3 at roughly the same time:
The Crucial P5 Gen3 drive suffers which is in the 3rd slot I think (can't remember). Still plenty fast though and 3-4x higher than SATA would offer. The Gen4 drives mostly seem unaffected except for slightly lower RND4K Q32T16 numbers.
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