Both of those NDCs should be available on a regular R640 as well. You can find available parts for the R640 by selecting Parts & Accessories on the system support page, this is not likely a complete list. The sales pages have limited specifications. You can find more information on the product support page. Browsing by product on our support site, you can find network adapter support pages under Data Center Infrastructure>Network Adapters.
DELL-Daniel My
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February 22nd, 2019 09:00
Hello
Both of the network daughter cards available with the R640 Storage Spaces Direct Ready Node support remote direct memory access.
https://www.dell.com/work/shop/cty/storage-spaces-direct-ready-node-r640-hybrid/spd/microsoft-storage-ready-nodes/pe_s2d_r640_hybrid_12880
Both of those NDCs should be available on a regular R640 as well. You can find available parts for the R640 by selecting Parts & Accessories on the system support page, this is not likely a complete list. The sales pages have limited specifications. You can find more information on the product support page. Browsing by product on our support site, you can find network adapter support pages under Data Center Infrastructure>Network Adapters.
http://www.dell.com/support/
Thanks