Testing components before loop. question.

[ratters]

I plan to buy several new bits mb cpu and two graphics cards. I have seen on some guides you should test you compents before you put them under water, to save yourself hassle on any doa bits and bobs.

I plan to buy an OEM 5820 and two 980ti wc editions How can i go about testing these as I will have no air cooling do i just have to bite the bullet and build my loop with these bits in it ?

Cheers for any pointers