I changed from a 460 GTX to a Gainward GeForce GTX660 Ti Phantom yesterday. Had already installed the latest 310.19 and recognized that nvidia-settings is showing wrong clock speed in performance level 3 for that card. It should be 1006 MHz for graphics but it is 705 as in Performance Level 2.
As said, i had that driver already installed before with the 460 GTX, and it showed correct values for all levels for the old card.
So my question: is this just cosmetics / a displaying problem in nvidia-settings and my card is running with 1006 MHz, or is it really just running with 705 MHz in level3?
Any way to verify that? I tried nvidia-smi -q as root but showed N/A most rows, and also in:
same issue here, gainward 660 ti phantom ( i didn’t even realize till seeing the first post, but i can confirm i’ve always had 705mhz with all 300 drivers. i’m on 310.19).
also note the PCIe link speed. mine changes from 2,5 to 5 gt/s
The 2,5 GT/s is correct in all - i just have a PCIe of first Generation, so it is the maximum.
Btw - did anyone find a suitable test or Info if the card is really running with only 705 MHz?
As I said, nvidia-smi -q mostly shows only N/A, seems like the latest drivers 3xx.xx for the 660Ti has still some functionality missing.
So to verify: can anyone run nvidia-smi -q and look if there is also N/A’s?
We currently have a known clock reporting issue for Kepler products on Linux; it should only affect the clock values reported through the driver, but the GPU will actually be running at full clocks. Sorry for this, we’re aware of the issue and tracking it.
I mainly use the GPU for rendering. I have a benchmark scene which finalizes the render in Windows after 1:21 and in Linux after 2:05 minutes. So it is not just a matter of showing the wrong clock speed. Could you please double check this?
That would be great. Are you familiar with Blender? You can use Cycles for rendering with GPU and download the benchmark scene at Link
I installed Blender on my Linux machine and my Windows machine. Standard installs. Since Blender uses pure CUDA kernel power, it is a great baseline to compare.
I also installed nouveau driver, but it does not work yet. But at least nouveau shows me the correct clock speeds. So it must be a problem with the driver.