Hi, I'm writing only for others like me, to know the outcome. At the beginning, I have started my question with "I can't find the document for the memory configuration for C6100 XS23-TY3, which I have used in the past." and have give you the direct links for the documentation that is available at that moment and that this is not the same documentation for which i'm looking. You Dell-DylanJ, have failed to give the correct answer, for which I was asking the Dell support. The answer is Yes, it will run at 1333 Mhz if you put 16GB DIMM in the 12 Slots at 1333Mhz each. In my case, I have used 12 x "M393B2G70BH0-YH9 SAMSUNG 16GB (1X16GB) 2RX4 PC3L-10600R DDR3" memory modules. Once again, I am disappointed with the support we rely on so much that it can help us and save time. After giving me your pointless answer, I had to physically take the server (which is quite heavy) to a second-hand company that had the memories in question, which was not easy to find. Asking them to test if memory will work after the manufacturer's support cannot provide a clear answer to such a simple question.  
Hi, Will c6100 XS23-TY3 run at 1333Mhz if I put 16GB DIMM in the 12 Slots at 1333Mhz each?   I can't find the document for the memory configuration for c6100 XS23-TY3, which I have used in the past. I'm finding in internet ([URL] some copy and paste from this old documentation, but it's only partial and not giving enough info for my question.    
C6100 XS23-TY3 Memory support 16GB x 12 pcs at 1333 Mhz