Hello, I can't see this card among the GPU matrix I can find for the T630. (on page 12 https://downloads.dell.com/manuals/all-products/esuprt_server_int/esuprt_server_int_poweredge/esuprt_server_tower/poweredge-t630_concept-guide5_en-us.pdf ) Also on the spare parts system, this model did not appear for the T630. This card may work, but since Dell will probably never have tested it for the T630, if a problem is encountered, there may not be enough information available to try to troubleshoot it and you can try to fix it yourself. 

Regarding the GPU enablement kit, if the T630 was not included with the GPU kit when it was first ordered, as far as I know, there is no option to be sold as a bundle as a GPU kit. You can have a look at this thread. https://dell.to/3CYCdbQ

Hope that helps!

The post you listed is 7 years old, and I suspect the enablement kits weren't sold when the server first went to market. The enablement kit is now available from places like ebay... 

If someone can say with certainty that simply buying part X7C1K isn't enough (and why)... that's what I'd like to know.