New crankset - Should I replace my chain

[RicovdM]

I recently went from 3by10 to 2by10 gears.

 

I replaced my crank, but not my chain and cassette.

 

I have ridden approximately 800km with the chain before the new crank and it seems very noisy ever since replacing the crank.

 

Would it be better to replace my chain or should it still be fine at this stage?

[Skylark]

Only a chain wear checker will tell you that, if the chain is still under the wear limits it's still good to go with the new crankset, same with the cassette. If the chain is way past the wear limits to you should probably change the chain and cassette.