Square Enix had updated Final Fantasy XIV Japanese official site yesterday and released the system requirement for FFXIV alpha beta test. The requirement may be adjusted before the launch of Final Fantasy XIV.
FFXIV beta test system requirement:
Windows XP SP3
Windows Vista 32-bit/64-bit SP2
Windows 7 32-bit/64-bit
Intel Core 2 Duo (2.4GHz)
AMD Athlon X2 (2.4GHz)
Windows XP: 1.5GB
Windows Vista/Windows 7:2GB
10GB for installation
10GB for installation content and extra update
NVIDIA GeForce 8800 or higher, memory 512MB
Radeon HD 2009 or higher, memory 512MB
DirectSound compatible (DirectX 9.0)
You can read Final Fantasy XIV Battle Details and Final Fantasy XIV Battle Details on MMOsite. Final Fantasy XIV is scheduled to luanch on both PC and PS3 in 2010.