I use three things
Custom computer-skeleton case, 6gbddr3 ram, intel i7 3.4ghz quad core, 4 250gb HDDs, 1 500gb HDD, and a 2TB HDD. ASUS Rampage II motherboard. Ubuntu, Windows XP performance (modded by my friend), Windows XP professional sp2, and Windows 7 Home Premium.
Dell Studio-6gbddr3 ram, intel i7 1.8ghz quad core duo, 650GB HDD, Windows 7 Home premium, Ubuntu (broken screen as of yesterday, so I can't work on any of my programs or rom hacks till it's fixed)
iPad (I HATE Apple, jsyk) I don't know how much ram, 32 GB SSD, iOS, I'm using this ATM since my other two are broken.