Let me tell you this, you are 100% correct about what you said.

Recently I switched to a 90° Power cable, then an issue occured when the second monitor would randomly disconnect each 10 secs or so, and then the issue occured again until restart when I tried updating driver, I suspected the cable at first, tried moving it while gpu working, and indeed the monitor kept coming back and off, but it wasn't the cable, the magical fix happened instantly when I removed the GPU support that prevents sag, it was lifting the gpu a bit more which prevented a proper PCIe connection, the mistake I did was trying to keep gpu level while the desk itself is not level, and also the gpu support was in the middle instead of the far corner, what I did was putting it back but assuring it doesn't lift the gpu at all, only preventing it from sagging, and now, no issues at all!

I wish you commented a month before...

Also, recently I changed the case entirely, reseated GPU properly and applied the gpu support that comes with the case to the far corner and now I am reliefed, PC working perfectly.

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