вот только железо ему нужно не слабенькое.
Запускай его как WM и требования почти вдвое упадут,или вдвое быстрее поедет
Официалка :
What is current recommended hardware requirements for XBMC
For end-users the recommended minimum requirement is an x86-based computer, with a 3D GPU (Graphics Processing Unit) that at least supports Shader Model 3.0 and OpenGL 2.0 (that features 24bpp or 32bpp for 3D hardware-acceleration support, which the XBMC GUI needs to run smoothly at an acceptable frame-rate). Graphic adapters that support DirectX version 9.0c or later usually meet all of those mentioned requirements, (Team-XBMC recommends NVIDIA GeForce 6150 or later as NVIDIA are currently the manufacturer that offers good device-drivers for Linux (and NVIDIA GeForce 6150 or later supports OpenGL 2.0).
XBMC for Linux minimum requirements
* x86 (Intel/AMD-based) processor computer capable of booting to CD-ROM.
o Intel Pentium 4, Intel Pentium M, AMD Athlon XP/64, AMD Opteron, or newer CPU (that support SSE).
o Fast modern dual-core processor is required to decode H.264 videos in FullHD (1080p) unless you have hardware video decoding (see GPU requirements below).
* For clarification; XBMC for Linux does not work on the Xbox game-console.
* ATI/AMD, Intel, or NVIDIA (recommended) graphic controller which supports OpenGL 2.0 or later.
o ATI Radeon R420 (X800) or newer supported, ATI Radeon R700 (HD 4000) or newer recommended.
o Intel GMA 950 (945G) or newer supported, Intel GMA X4500HD (G45) or newer recommended.
o NVIDIA GeForce 6-Series and newer supported, GeForce 8-Series and newer recommended.