Just got my Cosmos S , one word ...WOW , this thing is HUGE !!! I'm replacing my Antec 900 and it looks like a midget compared to the Cosmos S . I just love it , a lot of space to work in , the cable managment is a big plus . I would of liked to have a slide out for the motherboard but theres a lot of space so not that much of a problem .
I'm running a E8400 @ 4.2 Ghz and the temps are great .
Mad
I love this case too, and I would buy it again in a heartbeat. I have a Noctua NH-U12P CPU cooler installed on my ASUS Rampage and I was very worried that I could not close the case because of the large case fan on the cover. The housing for the fan just barely touches the cooling fins on the Noctua. I had to put the fan on the downstream side of the coolings fins. I also had to turn the fan housing 90 degrees so the flat part of the housing was on top and horizontal. Now only about a quarter inch of the fans housing just touches the edge of the cooling fins. And that's how it will stay.
So I have to say that in spite of the large case, the cooling fan on the cover could be re-worked just a little. I am just burning in my system now, and have it running without the cover on. My temps are all below 30 degrees C (20 for the CPU). The hottest part in my system is the Northbridge and Southbridge because the air flow is blocked by the video card. I have only the Cosmos stock fans so far. The NB and SB temps are 50 degrees C. with the cover off. I am sure these will drop as soon as I put the cover on and plug in the large cover fan.
I am also thinking of pulling an old reset switch from a discarded computer and mounting it in one of the bay grills. I'll update the measured temps as soon as I finish testing.