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simple, I have a few old DDR2 RAM chips laying around, and would like to use the Ram chips for a pager file on my PI. is this possible?

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    No, it is not possible - considering DDR2 Ram has 240 pins, it's not likely the 40 available on the raspberry pi are enough - and that's just the physical number of pins ... the actual functionality required to access DDR2 Ram is far beyond what is possible with the Pi's GPIO – Jaromanda X Feb 16 at 6:11
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You can get a ram disk (not a disk in the ram, a ram as a disk) and convert its SATA output to USB. But you will be limited to the USB speed and maybe you will need to feed it with additional power (maybe with a USB hub that has external power supply).

Thus, It is possible but I think it is not practical or efficient.

Source: https://superuser.com/questions/251694/is-dimm-to-usb-convertor-available

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Sorry, it is not possible to use DDR2 RAM with a Raspberry Pi.

If you need swapfile, use a USB hard drive or USB SSD as that's fast enough to allow swapping.

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