Change number of RSS CPUs (Emulex under W2016 DC) - limited to 4

I have an odd behaviour of Emulex OneConnect OCm14104B-N1-D 4-port 10GbE rNDC NIC

Latest available driver: 11.4.1205.0

ONE NIC can not be configured with expected number of RSS queues. I want 8, it lets me only set 4

Set-NetAdapterRss : Value must be within the range 1 - 4
At line:1 char:1+ Set-NetAdapterRss -Name NIC1 -MaxProcessors 8+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+ CategoryInfo          : InvalidArgument: (MSFT_NetAdapter...C0DC5BFE3473}"):ROOT/StandardCi...rRssSettingData) [
   Set-NetAdapterRss], CimException+ FullyQualifiedErrorId : Windows System Error 87,Set-NetAdapterRss

For the config I used this and this

Makes NO sense to me at all, anybody seen it?

Seb