Thanks for that info. Adata doesn't seem to have power specs on it's cards, but they do say it supports SDA 2.0 and all power modes, which should include standby and sleep. The tests I'm running are with the NIT essentially idle, so the cards should be in either standby or sleep mode which I thought was supposed to be power in the microamps range, not even milliamps, so there should be no discernible power loss. My guess is that maybe the adata cards aren't entering this mode for some reason?