It A LOT quieter then my Thermaltake Armor that was water cooled. I had a old p180 when they first came out, and I wish I never left it. But now that I am back with Antec, I will never leave! AS for temps, when the side is off, 27C and 25C right now for idle on CPU, 59C for the 8800, and case is never above 35C. When the side is on, just add 10C for all components. As for load temps, CPU never above 45C, 8800 never above 70C. Oh yes, and all hd's inside the case range from 29 (Seagate is primary with 2 windows partitions) to 39 (one of the WD's). I might be forgetting things, but this is my beast! Also it took me a while to do cable management on this puppy, but it is a lot easier to do it in this rather then the old p180 or the armor...