OK, so my baked MacBook is down, again (or almost).
Yes, it was a temporary fix, indeed, but thats exactly what I needed it to be.
There are few issues to address when talking about GPU failures. If your problem is solder cracking or some kind of "miscommunication" between your gpu and logicboard (and not a gpu failure itself) than, as it turns out, you should not use your laptop anymore if you don't want to damage it.
Here's the thing: if your GPU isn't properly connected to your logic board (even though it still "catches up" and you are able to boot) than your power supply has to send incredible ammounts of electricity to power it, much more than it normaly does. What it results in is your power supply going down (as my did), your battery going down much faster plus theres a risk of other logic board components being broken (especially those sensitive ones, like LEDs, network card).
There is actually a very simple way to tell if given MB is in good GPU condition or not. First thing - if you notice that it takes long, or longer than usually, for mac to turn the screen on than it is going down! Also, if you plug in your power adapter and you notice a lag of some kind between plugging it in and the green diode lightning up, and than switching to orange one than the mac is going down as well. Also if you notice some electric charges going out of your mag safe (or even flames) than you are in trouble.
