[nikhsub1]

Originally Posted by maxSaleen

Flow rates can have a large effect on your waterblocks performance. You said that you were going to throw a tdx in the loop so you will want to achieve all the flow your loop can muster. From this standpoint I still say run your rads in series.

You've got that backwards. If he ran the rads in parallel, theory is system flow rate should he higher. You halve the flow to the rads, which may be ok, but everything else gets a benefit from the parallel rads (the blocks). In series we introduce more head loss, how much more is unknown. Bottom line is, test both ways, it is the only way to get a clear answer, and then, it may not be so clear.