No, Aion is meant for single core processors.
The games is neither optimized for ATi or nVidia.
A Pentium 4 may work, but I'd get something better.
A GeForce FX 5600 will not cut it, get a 7800GT or better.

Could you ask some nc guys about REAL system requiremets of AION ?

Sometines i became really angry to this brazen lie about
"if you set to minimum all graphic options then for 20-30 fps in abyss pve and pvp you just need
CPU : Pentium 4 2.0GHz
RAM :1GB
VGA :GeForec FX 5600(128MB), DirectX 9 or higher
OS :Windows XP “

So I very like to know if the exe and dll of client was optimized for 2 and 4 core processors?
I mean did they mostly use intel c2d OR amd phenoms while building a game?
Did they optimized game for nvidia OR for ati videocards?