07-16-2019, 12:22 AM
(07-08-2019, 08:47 PM)tllim Wrote:(07-06-2019, 12:19 AM)lmcdo Wrote: Definitely kicking myself that I didn't make an account sooner -- I've been following the project but forums have always scared me off. This forum seems well-managed though, so a mistake on my part.Around 2.5W reserved for NVMe drive. Please don't use the power hungry type SSD which can creates heat and power consumption issue.
A somewhat important question, also related to storage: what's the max power draw on PCIe devices over m.2? Some of these NVMe disks have wild maximum power draws.
Interesting. Is this the absolute maximum? After reading some Tom‘s Hardware reviews of NVMe SSDs (I know quite a few sites that do hardware reviews, but these seemed to be the only ones who tested the load power draw of the drives they tested), I found out that about all NVMe SSDs can use more than that under full load. Even power-saving drives like the WD Blue SN500 can use 3-4W under full load (average under load was lower though), which was the lowest measured apart from the Crucial P1, which was received bad in general due to the QLC flash, and SATA SSDs. the SX8200 Pro @hmuller recommended has indeed lower idle power draw, but rather low efficiency and high power usage in general. The review of the Seagate Barracuda 510 (https://www.tomshardware.com/reviews/sea...150-2.html) is pretty interesting, as ittshows the power usage of those two drives I mentioned, but also that the Barracuda has very good power statistics - high efficiency under load and low idle power draw. What happens if one tries to pull more than 2.5W from the M.2 port? Do the electronics fry? Does the system crash? Will some electronics (supposedly the SSD throttle due to power limitations? Or will the battery of the laptop just discharge slowly because the power supply cannot output that much power? Of course you wouldn‘t put a Samsung 970 or so in there, but at least a Barracuda would be nice. Of course it uses much more power during load (2,52 W) average, as opposed to the average 1,8W of the SN500, which only spikes to 3W.