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GPU-Z problems with NV GT630M

Nov 20, 2013
2,510 (1.69/day)
Kiev, Ukraine
System Name Evil Midget
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Software Windows 10
Benchmark Scores Can fit into a backpack =)
I'm having some problems with GPU-Z on my laptop.
First problem - jumpy sensor readings.
It shows the data for about 1 second, then it goes blank for 5-6 secs.
Second problem is on the main tab of the program.
No gpu/vram speed info, and the Bus Interface is jumping between PCI Express and PCI-E 2.0 x16.
Also shows no CUDA support.
Jul 21, 2010
386 (0.14/day)
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It is most likely the nvidia optimus technology messing up those readings.


Staff member
May 14, 2004
17,057 (3.44/day)
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It is most likely the nvidia optimus technology messing up those readings.
I think so too. Can you disable Optimus to test if that solves the problem?
Aug 30, 2009
4,001 (1.32/day)
Sarasota, Florida, USA
System Name Awesomesauce 4.3 | Laptop (MSI GE72VR 6RF Apache Pro-023)
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Software Windows 10 Pro x64 | Windows 10 Home x64
Benchmark Scores GTX 1080 please?
What is there to fix? When the NVIDIA GPU isn't being used, it gets put in a sleep state by the driver until it's needed again, and there's no reason to monitor it in this state. Your Intel HD graphics on your CPU run 100% of the time and is connected to the display outputs, and the NVIDIA card (when it's actually running) uses some "driver-fu" to get its framebuffer over to the Intel chip and display it. This is how most Intel/NVIDIA laptops are set up today, and if the display outputs were actually connected to the NVIDIA chip, it wouldn't be able to turn off at all and the Intel integrated graphics would serve zero purpose.