[joshyfishy22]

To my understanding, You cannot use a NL4R with Origin hardware. Now I don't know 100% that this is the case and have never personally tested it (since I don't have an NL4R brick).

Altix hardware is backwards compatible with NL3

" The NUMAlink 4 links can also operate in NUMAlink 3
mode (20 data bits, 800Mb/s uni-directional) thus enabling
backward compatibility with NUMAlink 3, for product upgrades
to Altix® systems. "  https://www.graphica.com.au/files/numali...ica.com.au

But Origin hardware cannot run at NL4.

If you have another reason to buy the NL4R bricks then go for it and test to see if it will work with the Origin hardware. But if you don't want to waste money then id pass.