Hi. I bought two 7261s and put them on a Supermicro H11DSi, but the system doesn't even want to be powered on when both sockets are populated, swapping them won't help. Can confirm that they are both retail 7261 and they boot just fine individually on the same MB, and the MB doesn't seem to have any issue. One difference I noticed is that they have different UA number with one being 1735SUT and another 1741SUS. Could that simply be a bad MB?