Enzorik,  The 16GB x8 dimms you mentioned here  , are indeed certified replacements for the R510. So they would be the dimms to use. Hope this helps. 
Hello. I'd like to upgrade my Dell PowerEdge R510 with 128Gb RAM. Can I use 16Gb RAM x 8 dual rank? Like this one   Broken link has been removed from this post by Dell >  Or I need to order quad rank memory for my upgrade? And if yes, does Dell provide such kind of RAM? Thanks in advance. 
Dell poweredge R510 128GB RAM