2 Separate loops or 1?

[Lays]

I'm looking at buying a 900D and going all out on a watercooling build in a month or maybe longer, i'm planning on getting something like 2 480mm rads that are pretty thick, but I was wondering, should I do 2 separate loops? Or one single loop with both the 480mm rads in it?

 

Also I was wondering how I should do the loop, should it be res->radiator->cpu->gpu's->radiator-> res?  Or something like res->cpu->radiator->gpu's->radiator->res?

 

 

I'm looking at a final build to look like this:

 

 

 

[Uberskills]

yeh what arokantos said do the one loop as two loops are unnecessary and if you can make it look like that well done sir

[Lays]

1 loop with 2 pumps

 

how should I do the loop? does it really matter which order the coolant goes?