Unable to Increase Memory on ESX Server

Hi,
we’ve got an ESX guest server running Windows Server 2016 with an Nvidia Tesla M60 in compute mode attached as a PCI device.

This is all running fine without any issues.

The guest server has 256GB memory.

When I increase the guest server memory to 320GB, and re-check the ‘Reserve all guest memory’ option the server won’t start - I get the error messages ‘Failed to register the device pciPassthru0 for 5:0.0 due to unavailable hardware or software support.’ and ‘Module ‘DevicePowerOn’ power on failed.’

Has anyone got any ideas on what I can do to fix this please?

thanks,

Tom

I managed to fix this by updating the firmware on the host server.

thanks,

Tom