Powering NVIDIA Tesla K40 GPU


I am trying to install the new NVIDIA Tesla K40 in our HP Z800 workstation with a 1100W PSU which according to the data sheet can supply upto 1250W.

I get the following error message even though I have connected the 6pin power connector

Unable to determine the device handle for GPU 0000:42:00.0: Unable to communicate with GPU because it is insufficiently powered. This may be because not all required external power cables are
attached, or the attached cables are not seated properly.

Could anyone who has successfully installed the K40 please help ?


Do you connect both 8pin and 6pin power connector?

We have only 2 6-pin connectors available. Do you think a 6-pin to 8-pin adapter will do the job of providing sufficient power to the card ?

Thank you