Hi,
for a while now I have been unable to enable my hyperthreading and start windows 10 .
When Hyperthreading is enabled in BIOS, it loads up to the point where the windows logo appears, then loads a couple seconds more, then reboots... in a loop up to the point where you need to recover, but then it still can't recover until I disable HT.

I can remember in the beginning when I assembled the computer, to test rendering performance on cinema4D with Vray, I was being recommended to disable HT for better performance, so I did some testing with HT on and off. It was better with HT off for vray, so I left it off

However I recently switched to Corona renderer, but for some reason now I can't get HT back enabled anymore...

The guys at the computer hardware store had no solution for me, and I really wanted to see if I can benefit from HT on such a powerful machine, therefore I tried posting here too... I feel like I'm missing out on 40 cores... 😞


Here is a quick overview of the components, built in 12/2016 :

2x INTEL XEON E5-2698 V4 14NM 2.2-3.6GHZ 50MB 20 CORES --> so a maximum of 80 cores with HT
ASUS Z10PE-D16 WS --> Bios latest version
8x KINGSTON 16GB 2400MHZ REG ECC DDR4 KVR24R17D4/16
SAMSUNG 2000GB 2.5 INCH 850 EVO SERIES MZ-75E2T0B
CORSAIR HYDRO SERIES H80I V2
MICROSOFT 64 NL WINDOWS 10 PRO 64BIT OEM - up to date
CORSAIR AX1500i
ASUS GEFORCE GTX 1080 STRIX A8G

now here is the mind breaker:

When i set msconfig > boot > advanced options > number of cores > unticked
I cannot boot with hyperthreading, so leaving HT disabled, then

device manager reads 40 CPU's
task manager: 2 socket, 40 physical cores, 40 logical cores
CPU-Z recognizes 2 CPU's with 20 physical/20 threads for each CPU
render a testframe in 5min54


When i set msconfig > boot > advanced options > number of cores > 40 (which seems to be the maximum in the list)

I CAN boot with hyperthreading enabled, but then

device manager reads 80 CPU's
task manager: only 1 socket, 20 physical cores, 40 logical cores (so one processor with hyperthreading)
CPU-Z recognizes only 1 CPU with 20 physical/40 threads
render a testframe in 5min41, yet somehow cinema4D and windows feel a bit faster

and msconfig > boot > advanced options > number of cores > still has a maximum of 40


I already tried clearing CMOS and upgraded BIOS to last available version
Also for now, I reset BIOS Settings, so everything is at default exept for the HT and boot configuration
Are there other settings in the BIOS I must change from defaults?

Any tips are most welcome!
Feel free to ask more info.
thanks!