ok now with the case side closed I get near 70c on full load. I'm going to replace the fans that are cooling the rad to higher air flow fans.
What is room temperature?
Really the temperature difference (TD) between ambient temp and cpu core is actually a better way of judging your cooling efficiency.
If you are at 70c full load in a 80f room then your okay but if your in a conditioned space at 70f then 70c is not good.
My dual Xeon P4 based 3.2s (mini toaster ovens LOL) do not go higher than 65c full load after 30mins in a 72f room on air cooling. 7 fans plus GPU and PSU fans for a total of nine fans.
An I7 on water should run way cooler.