Yeah it works great with no fan. I used AS3 on all the contacts your supposed to put grease. I am going to move it to my desk pc P4 2ghz when I decide on a Geforce FX for this one. Probably the Gainward with the quiet fan. But I want to see benchmarks on the Geforce FX's with 256mb first. Gaibward is the best imo. The ram sinks don't get in the way either. There were 2 versions of ramsinks though released, I have the flat ones. If you have the tall red ones on the front I'll have to look to see if you'll have enough room. As far as case I'll link to it http://www.directron.com/201b.html
that one with a side window and silver screws/usb plate.
It's all aluminum. I'm using the Vantec Aeroflow P478 Cpu fan with a thermaltake 3 speed switch. Usually running on low speed except benchmarks. On low Cpu is 40C. idle 48,49 gaming.UT2003 etc. It would be colder on high. Also If the Gainward geforce FX with a fan may keep case temps lower than the 4600 with no fan we'll see. Also my scsi drive is warmer than a ide drive. I'm still using the standard case fans that came with that case also on a thermaltake speed switch. The thermaltake switch works nice and is like 7 bucks. http://www.maxcooler.com/thera1fanspe.html
I'm really happy with that case, not sure where to get that exact one anymore there is some imitations but they come with less fans. Long post but I'm a hardware fanatic lol. Hope that helps.