this post was submitted on 07 Jan 2025
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Micron's new PCIe 5.0 SSD promises longer battery life (www.tomshardware.com)
submitted 2 days ago by Alphane_Moon to c/hardware
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[–] Alphane_Moon 2 points 1 day ago (1 children)

This seems to be primarily aimed at PCI-E 5.0 SSD adoption in laptops, where every bit of power saving counts.

2-3 watts is not bad considering (desktop) PCI-E 5.0 SSDs seem to consume about 5-10 watts.

Lower power consumption would also reduce heat, albeit I have no clue about the overall impact.

[–] [email protected] 2 points 1 day ago (1 children)

The back of my envelope says that if a 50Wh laptop battery gave you 5 hours of run time, an average of 10W, then reducing that to 7W whilst keeping everything else the same would give you just over 7 hours. But it likely wont be quite that much in practice because all the components are constantly changing their power requirements and my envelope has a corner torn off at that point.

[–] Alphane_Moon 2 points 1 day ago* (last edited 1 day ago)

I don't have experience with laptop PCI-E 5.0 SSDs, but I don't think the desktop power consumption numbers (dynamic?) would map directly to laptop use cases. I.e. I highly doubt laptop PCI-E 5.0 SSDs consistently eat 5-10 watts during runtime. There would have to be some sort of power focused optimization routines. With desktops, you don't really need this.

I think the bigger goal is lowering power impact from PCI-E 5.0 SSDs on a relative basis. The focus seems to be on significant improvements in power consumption for relatively modest decrease in top speed capabilities; a trade-off that one could argue is a perfect fit for laptops.