Yes, there seems to be inconsistencies.
Yes, there seems to be inconsistencies.
Hello, your E5-2650-V3 processor is being shown differently across sources. Intel lists it under "FCLGA2011," while other sites say it's compatible with the 2011-3 chipset. Your Machinist X99 board may not support it officially, though some retailers like Tech Powerup claim otherwise. Double-check compatibility with your specific motherboard model before purchasing.
V3 means it's Haswell-E, fitting the LGA 2011-3 socket. The "X99" board you have should function (though it will likely be a C612 board, it still matches the same connector). Intel knows about all the CPUs from that era, but I don't understand why they're not compatible.
I'm still using my x99 board with a socket 2011-3 port. It ran an Xeon E5 2620 v3 for a while before I swapped it out for a CPU. It seems unclear why an E5-2650 v3 wouldn't fit, since you mentioned the X99 is likely the final consumer chip that supports both types. After Intel restricted all Xeons to their server chipsets, compatibility issues arose.