have some blobs artifacts I think my card is dying .. must contact EVGA for Warranty  

I had a very similar experience playing A Plague Tale: Innocence.  I would get similar "rainbow sparkle flashes" after playing a bit and then the game would crash to desktop without error.  I enabled vsync in game and the problem disappeared.  This is the only game I've experienced this phenomenon with and I have absolutely no idea why enabling vsync worked.
 
EVGA x99 Classified
16 GB Corsair Dominator at 3000 MHz
5820K at 4 GHz
EVGA 2080ti XC2 stock frequency
EVGA P2 1200 psu
Acer XB270HU Gsync monitor, Gsync on

Not work for me, the problem still there 

Try 3dmark or any other benchmark, even Superposition. Games are not the best way to check for artifacts.

Rma time.