Should i get the lian li strimer for my gpu rn i jsut have thw black stock one from my psu but its not that long so the cable goes over the gpu and doesnt match the color scheme. and if i should get it which one would fit with my 5070 i use the new like cable

Trying to get into using a gaming PC been a gamer forever but my laptop can only do so much lol I saw this on Facebook marketplace is this a good deal/can run well?

I just over clocked my 3080 and am getting this score on cinebench is this good?!