Paul-WB5AGF
Posts: 12
Joined: Thu Feb 22, 2024 1:28 am
Location: near Dallas, Texas

What's A Safe Current Drain For A PCIe-nvme Board ?

Sat Feb 24, 2024 10:21 am

At present I've got a working SSD on my Raspberry Pi 5 using the Waveshare board (https://www.waveshare.com/pcie-to-m.2-hat-plus.htm).

A friend (retired Cisco engr) and I are both gaining experience with the Raspberry Pi 5 device and he supplied me both with the Waveshare board and a 256GB card (believe it's this : SkHynix 256GB PCIe NVMe 2230 SSD - $17 on Amazon).

I'd like to learn how to be able to selectively boot from different partitions on the same memory device but I'll feel more comfortable with a bit more room for each installation .... so I'm looking at some 500GB boards.

What's got me concerned is that the devices appear to be showing that they may need more current than my present 256GB card.

How much current can the Raspberry Pi 5 board supply to a PCIe nvme board ?

- Paul in Texas

aBUGSworstnightmare
Posts: 9693
Joined: Tue Jun 30, 2015 1:35 pm

Re: What's A Safe Current Drain For A PCIe-nvme Board ?

Sat Feb 24, 2024 3:24 pm

https://datasheets.raspberrypi.com/pcie ... andard.pdf
That's the spec of the PCIe connector.
Refer to page 5: 2 pins which carry 5V, capable of 500mA each --> 1A total current.

Paul-WB5AGF
Posts: 12
Joined: Thu Feb 22, 2024 1:28 am
Location: near Dallas, Texas

Re: What's A Safe Current Drain For A PCIe-nvme Board ?

Sat Feb 24, 2024 5:00 pm

I don't believe that the Waveshare adapter is solely dependent on what the PCIe ribbon cable can carry as it has access to the pins on the GPIO connection.

- Paul

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