Quote Originally Posted by stren View Post
Got some time to do the restriction plots:



I'm surprised by two things:

1. Why is the swiftech block so different to the EVGA? I wonder if this is a bad block - I haven't done thermals on it yet. Internals should be the same as the EVGA.

2. Why is the AC block pressure seemingly tailoring off at high flow? I've never seen that happen in any restriction plot?

For reference here are curves from other blocks and rads plotted on the same scale axis:





So in other words for restriction rads are generally the least restrictive, and some of the GPU blocks are similar in restriction to some of the cpu blocks
#2 Likely due to "flex" in the block. I have seen this in rads like the HWlabs GTX series and a few others. As pressure increases the chambers/tubes whatever expands causing the normal curve to flatten. GTX rads use very thin and flat and restrictive internal tubes. Som block tops probably just don't have as much bolt restraint or the thin copper base could be flexing. It happens..

Great work as usual. Hope be done moving in the next month so I can do more playing as well. Now the proud owner of three mortgages..