Why does a discrete graphics card on a laptop fall off during a game?

Question

Video cards

The situation is this. When playing dota2 (I didn’t notice this in others), the video card falls off at a random moment in time, that is, the image freezes, but I hear the sound and can control the character. If you restart the computer, then in the device manager the discrete video card is visible as disabled and if you open its properties, then there is an error "now this device is not connected to the computer code 45", and if after this reboot you start DotA, then the error "could not be detected direct3d device". The only thing that helps is turning the laptop off and on again. The video card appears in the manager in a normal state and you can play. This happens from under any Windows (7, 8.1, 10) and only in DotA, which is strange. Yes, the card is so-so, the laptop itself is old, but for some reason everything is fine in other games. Chased the card with a furmark, everything is fine. There was a high temperature, I changed the thermal paste and dropped within reasonable limits. I also tried to play with different firewood, - also to no avail.
I've looked all over the internet and I don't know what to do with it. Any ideas?
UPD: Specifications of the i5-2410m
2x4GB DDR3 NVIDIA GT530M laptop UPD2: The problem was repeated in two other games, but the strange thing is that the card did not fall off and worked without problems in a few hours at the fair. No idea what it is and what could be connected . I pray that the matter is not in the glands themselves

Answer 1

If the laptop returns to normal after turning it off and on, then there is probably something with the bios settings (Windows 7 and 10 can change some bios settings, at least those related to time; maybe windows somehow transfers the right to change settings bois dota...) Is the bios itself fresh? Try updating if not.

Answer 2

Well, the most important idea is to put the drivers on the video card from the laptop manufacturer's website. And only from there you need to put them. Because manufacturers "rewrite" for their laptops. Well, according to the rest of the signs, in DotA you need to lower the graphics settings.

Answer 3

Overheating is therefore

Answer 4

I have the same problem. I also noticed that if I click on restart the computer, then after ten seconds the computer freezes during the reboot.