Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I wanted to use OpenCL under Windows 7. I've got everything set up (Cuda Toolkit 4), the nvidia card is compatible (GeForce 310M).

I've got a Acer Travelmate 8372 with optimus, and I've got a bios option where I can choose between Switchable and Discrete or something similar. But if I choose the discrete option, all of the rendering is done over the intel chip, it's not even listing the nvidia card in the device manager anymore.

In switchable mode I can not find an option to enable the nvidia card explicitely. Hence the CUDA OpenCL Platform is not available.

Also I'm a bit confused about driver versions. Acer provides a Version (from 2011/11/24), where as NVidia provides the latest driver version 285.62 (from 2011/10/24). Why do these versions differ? Because of Optimus?

I can't install any of the drivers provided by nvidia, the setup is complaining about incompatible hardware.

Edit: As I read optimus itself cannot be disabled, because the Intel chip is the graphics gateway either way. So the question should be: How can I install the Nvidia development driver on my optimus system?

share|improve this question
At least you're not trying to run linux. Optimus is like leprosy in linux. – kobaltz Dec 23 '11 at 3:46
Well actually the Bios switch is working as desired under Linux... It uses the Nvidia card explicitly. – rdoubleui Dec 23 '11 at 7:33
And I was able to install the Nvidia development driver on Linux. – rdoubleui Dec 23 '11 at 7:37
Yea. My laptop didnt have the toggle in the BIOS. Had to use Bumblebee. – kobaltz Dec 23 '11 at 12:41

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.