Which is the latest P/N revision for Poweredge T420 motherboard?

Hi, good day, please do you know the latest revision or version for the Poweredge T420 motherboard?, the one at the moment inside this server is P/N 0RCGCR , I have seen online shops selling other versions  like  03015M, 061VPC, 0TT5P2, 0RCGCK, 0N567W and 0CPKXG, the only difference between the 0RCGCR and 0RCGCK may be  is just a seller typo error,  perhaps the latest revision have the BIOS already updated for the V2 processors, thank you very much