Takže: základ je hodně paměti (4GB), CPU stačí jednojádro, okolo 2,2-2,4GHzYah that isn't nearly fast enough to run a Minecraft Server, from what I've seen the server is extremely memory hungry. Notch hasn't put out offical recommended specs, but I'd guess this is pretty accurate.
CPU: 2.4Ghz Single Core CPU (2.2Ghz Dual-Core or Higher Recommended)
Memory: 4GB or Higher Recommended