Are you asking about the Fitting Size *Standard G 1/4 on the Water Block or are you asking about the Fittings that come with the with the HC, that is the Tubing Size.
Also I did not get any fittings with the last HC Water Block for the GTX 1080s.
All the Fittings that came with like the 980 cards and below where to small and through them away.
But all of the GTX 680 / GTX 690 / GTX 780 / GTX 980 / GTX 1080 are all G 1/4 Ports on the Hydro Copper Water Blocks.
I use this Tubing Size ID: 13mm (1/2") OD: 19mm (3/4") Wall: 3mm (1/8") Intended Tubing Size
The Older Fittings that came with the Older HC WB are this Size if I recall
ID: 10mm (3/8") OD: 13mm (1/2") Wall: 1.5mm (1/16") Intended Tubing Size
And this Size ID: 6mm (1/4") OD: 10mm (3/8") Wall: 2mm (5/64") Intended Tubing Size
post edited by bcavnaugh - 2017/06/22 13:41:37