95-100% GPU usage is ideal. It means you're getting full use out of your GPU and not being bottlenecked. Just make sure you're not overheating.
90c on a CPU is pretty high. i7's can take a lot of heat, but 90c is way too high. I'd aim for maybe 70c load at most. Anything higher just means you're shortening your CPU's life span. The H50 isn't a true liquid cooling system. High end air cooling systems like the Thermalright True 120 are better at cooling.
Edited, Feb 18th 2011 11:05pm by SoumaKyou
90c is only at 100% load on prime95, on FFXIV there at 62c
Agreed, 90c on a CPU is not good or ideal, especially with a possible liquid cooled system. It seems like you have an issue with how the cooler is seated on the CPU. Something is not connecting fully, check the thermal paste.
Also, Like all the posters have stated, running >90% on GPU is good, mine (GTX 480) runs > 95% at all times with FFXIV, and I have a Q9550 and a resolution of 3840x1020 with a matrox triple head. (three 22" screens) [and can run a max of 5040x1050 <-- with less framerates of course]
5040 X 1050 with Matrox Triple Head 2 Go
480 in SLI
I-7 950 OC 3.68 Ghz, 12 GB DDR3 1600