This beauty has served me for several years now without a major hitch. Obviously during that time I have made changes to it, most notably upgrading from a HD 4870x2 > HD 7870 to now Sapphire 7970 GHZ's in Crossfire.
In saying I still use this today, but I'll list the missing components and modifications.. Motherboard = GA-X48-DS4
Added two fans to the front as intakes (Did this by attaching them to the front Drive Covers) http://www.overclock.net/t/467996/cosmos-s-cheap-easy-front-fan-case-mod Crafted extra cable holes (for a ATX board) and a backplate hole as the Cosmos S doesn't have access to attach rear backplates while keeping Motherboard in place.
This was the original build back in 2008: Intel Core 2 Quad Q9400 Gigabyte GA-X48-DS4 4GB Kit (2x2048MB) Corsair-Performance PC6400 800MHz DDR2 2x Pioneer 215D Black Dual Layer DVDRW Creative X-Fi XtremeGamer Fatal1ty Pro 2 x Seagate Barracuda 320GB SATA 7200RPM 32MB HDD HIS R4870x2 2GB Coolermaster Cosmos S Antec TruePower Quattro 1000W PSU
Nowadays however I can still play all games on at least high settings on 1080p with 60fps constant which is more than enough for the games I play such as Dota 2, TF2 and PR 1.3 (Battlefield 2 mod).