Here are the minimum and recommended requirements for Wrath:
* PC:
o Windows XP SP3 or Vista SP1 (Windows 2000 no longer supported)
o Pentium 4 1.3 GHz or AMD Athlon XP 1.5 GHz (up from 800 MHz Intel/AMD). Dual-core recommended.
o RAM: 512 MB/1 GB for Vista, doubled from same as previous. 1 GB/2 GB recommended.
o Video: GPU with hardware transform and lighting and 32 MB VRAM, same as before. Recommended 128 MB VRAM.
* Mac:
o Mac OS X 10.4.11 (10.3 no longer supported)
o PowerPC G5 1.6 GHz or Intel Core Duo. Big change here: G4s are no longer supported. This one actually affects me, since I do have some G4 machines hanging around the house. Intel 1.8 GHz recommended.
o RAM: 1 GB, up from 512 MB. 2 GB recommended.
o Video: Hardware transform and lighting, 64 MB VRAM. On the face of it, this rules out the integrated graphics found on MacBooks and Mac Minis, but there's been no official word on it yet. 128 MB VRAM recommended.
more here
* PC:
o Windows XP SP3 or Vista SP1 (Windows 2000 no longer supported)
o Pentium 4 1.3 GHz or AMD Athlon XP 1.5 GHz (up from 800 MHz Intel/AMD). Dual-core recommended.
o RAM: 512 MB/1 GB for Vista, doubled from same as previous. 1 GB/2 GB recommended.
o Video: GPU with hardware transform and lighting and 32 MB VRAM, same as before. Recommended 128 MB VRAM.
* Mac:
o Mac OS X 10.4.11 (10.3 no longer supported)
o PowerPC G5 1.6 GHz or Intel Core Duo. Big change here: G4s are no longer supported. This one actually affects me, since I do have some G4 machines hanging around the house. Intel 1.8 GHz recommended.
o RAM: 1 GB, up from 512 MB. 2 GB recommended.
o Video: Hardware transform and lighting, 64 MB VRAM. On the face of it, this rules out the integrated graphics found on MacBooks and Mac Minis, but there's been no official word on it yet. 128 MB VRAM recommended.
more here