Broken graphics card?

[SaltySilver]

I have a watercooled loop with my graphics card (2080 ti EVGA XC), that I bought last year august, and cpu (i7-9700k). I was noticing lower frames than usual so I benchmarked using 3D Mark firestrike ultra and normal (ultraresult.3dmark & normresult.3dmark). My benchmarks were a bit lower than I expected, and this was not the first time this has happened. I did another benchmark around two weeks and got a super low score (3658, file name lowresult.3dmark). After I saw that benchmark, I reapplied my gpu thermal paste and got a better result (8319, file name closed.3dmark). Its only been 2 weeks and my performance is already going back down. I reset all my drivers and all benchmarks (except for normresult) are without any overclocks. My watercooling loop is clean and i've used IC Diamond thermal paste for my gpu. I have the EKWB Lignum waterblocks. Replacing the thermal paste in my gpu every two weeks is ridiculous, there has to be a larger issue. Do you guys have any suggestions?

Ultraresult.3dmark-result normresult.3dmark-result lowresult.3dmark-result closed.3dmark-result