I want to wrap with waterblocks both of my ssd's, but some black cubes (looks like rubber) placed under them.Can it be safely removed?

I can't pass OCCT CPU test at default bios settings (don't touching anything). Error occurs sometimes at first 1-20 seconds. All long run tests seems to be ok.The temperature isn't issues because i'm using watercooling.Is it designed behaviour or i h...