It should have worked, Its possible that the flashing process was a dud. I could sell you mines I have 2
E5 2683 v4 they both work they came off of a HP dual socket motherboard. How ever you will still be in the same situation if the motherboard bios wasn't flashed properly. You have to without...
I figured the GTA V last week
C:\Windows\System32\cmd.exe /C START "GTAVLauncher.exe" /high /affinity FFFFF "C:\Program Files\Grand Theft Auto V\GTAVLauncher.exe"
Every F is 4 cores apparently I can only use 20 core for GTA V. Its a constant 60fps 1080x1920 Ultra everything maxed out with x4 msaa
I havnt taken a look yet, I updated all my software e.g cpuz, hwinfo 64 and aida64. Before I would get inconsistencies in my readings up until I updated the software its possible that your software is dated.
I think it should be stickied somewhere that the x99 Msi Raider ships with the oldest bios only supporting haswell v3. It works very well and just needs a bios update to p.4 and above to work with broadwell es v4's.