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There is a difference between T440 and T440s. T440s is already power optimized and runs integrated GPU vs T440 which is more normal laptop with discrete graphic

There is a difference between T440 and T440s. T440s is already power optimized and runs integrated GPU vs T440 which is more normal laptop with discrete graphics. I used mostly powertop but this is less reliable source of information when you are running discrete graphics card.

znpy 5y ago
My T440 does not have a discrete GPU. It's basically a T440s without the touchpad. But it's got an i7, of that matters.
- saltcured 5y ago
  As an i7, is it quad core? I had a T440p with i7-4700MQ and it had terrible power consumption compared to prior and later Thinkpads I have experienced. What I saw in powertop was that it never got into the better "package" power states. The cores could all be spending 90%+ of the time in C7 but the package as a whole was in C2 or worse. I never found a way to fix this. Mine had the NVIDIA GPU as well as Intel iGPU, and I primarily used it with the iGPU. The NVIDIA was of the sort that was not connected to a physical output, so it supposedly could be powered down when not being used. I had no way to truly verify this, of course.
  - znpy 5y ago
    Nah, just a dual-core i7 @ 2.1 GHz. I got that laptop 2nd hand, so that was it. I don't get into the bios very often so I might be wrong, but I don't recall seeing any indication of an nvidia gpu in mine. I'll look better!
    - saltcured 5y ago
      On my T440p, the Intel and NVIDIA GPUs would show up via 'lspci'. I don't recall whether there were any BIOS options other than internal vs external display during POST/boot.