How to fix a Palit 970 video card that fills the screen with a random color after 65 degrees?

Question

Do it yourself

A question about the Palit 970 video card.
Since some time, the video card, when heated to 65 degrees (normal load temperature), began to fill the entire screen with a random color. At the same time, nothing hangs (the sound goes on), there is no image.
At the same time, the video card works fine at 40-45 degrees (no load) in 2D / 3D applications, until it warms up to 65 it shows everything perfectly.
Therefore, I am sure that everything is fine with the chip and memory. Perhaps something on the board burned out and at a certain temperature it starts to “break through”, giving out the wrong (for example) voltage / purity to the chip / memory. Which leads to this result.
Even in hot mode, when rebooting, I saw artifacts (stripes of the color of the win10 flag) when loading Windows. In the cold - perfectly loaded.
Accordingly, the question is - who faced? How can you identify the problem (naturally by spinning up the video card), where and how to look?
I'm just thinking about resoldering a burned-out chip (it doesn't feel so scary), but I don't know where to start "digging". It is curious to try it yourself) to identify the problem and possibly solve it (if I can find such a chip on the market). I'm new to electrical circuit boards, but I'm sure this is a great reason to start understanding)

Answer 1

Artifacts under load are very likely to dump the chip. You can warm up, and then how lucky.

Answer 2

I understand - late, but ...
tried to change the thermal paste?
but in general, yes, it’s a dump of a chip or a GPU or one of the memory modules, I would put it on the GPU
, read about BGA soldering in Google, it won’t work without special equipment. So if replacing the thermal paste does not help, then to the service, although it’s expensive for me, and rolling the old chip on new balls may not give a result

Answer 3

The chip is under replacement, and that's why it heats up because its not a long age ....