It is possible to run Apple MacOS X at full speed on non Apple machines with Linux PowerPC:
MacOnLinuxLinux PowerPC machines:
1. Pegasos ODW based on PowerPC G4, Marvell chipset:
Pegasos ODW2. Eyetech AmigaOne, uA1 based on MAI Logic Articia chipset
Eyetech A1, uA13. Troika Amy05 based on Tundra TSI107 chipset
Troika Amy054. Mercury / Momentum Maple PowerPC 970/G5 board based on IBM chipset:
Mercury PowerPC 9705. IBM JS20 with PowerPC 970/G5