I am assuming by AMD 7742 you are talking about a AMD EPYC 7742 Server Processor!
Maybe if you asked at AMD SERVER GURUS you might get a better response since that forum is used for anyone concerning Server and its hardware including EPYC processors from here: https://community.amd.com/t5/server-gurus/ct-p/amd-server-gurus
That processor is not cheap at all. It is very expensive ($5000.00), at least, at Amazon: https://www.amazon.com/AMD-EPYC-7742-Tetrahexaconta-core-Processor/dp/B07XGB7S36
Found that Ebay sells a EPYC 7742 for about 50% off from the MSRP: https://www.ebay.com/itm/AMD-epyc-7742-QS-64-core-128-threaded-2-25GHz-225w-processor-/174213177568
NOTE: Found out the Seller is from China so I would be wary or careful about what you are buying from them.
