If i were you i will consider a celsius s24 with radiator on front with 25mm fans, BUT with shorter tubes...definitely a very good option with your four titan V (gg on that, you will a tremendously powerful Cerberus-x..
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As you are going to a micro atx variant with no offset in pcie slots, i recommend you celsius s24. Its native long tubes are great to put radiator on the bottom. Furthermore you can easily shorten tubes length if required..
Noctua c14s, on air cooling, should be possible but i’m not sure of clearance between heatsink and gpu, as you don’t have a pcie 1x as offset before gpu.