Quick build question

[RTDSpector]

At this point since im going with 1/2" barbs and 7/16 tubing would getting an asus striker 2 extreme for cooling the north bridge be justified? I know it has fittings for 1/2" but wouldn't that restrict the flow since its 3/8" by stock? Also does the V-tech fuzion v2 come with the quad nozzle now because i don't see an option anywhere to buy it now. I should hopefully begin working on this build in a week and a half will be posting a worklog.