Because I am the unofficial Xbox 360 spokesman, here they are, via Xbox.com's website.
Xbox 360 System Performance Specifications
Custom IBM PowerPC-based CPU Three symmetrical cores running at 3.2 GHz each
Two hardware threads per core; six hardware threads total
VMX-128 vector unit per core; three total
128 VMX-128 registers per hardware thread
1 MB L2 cache
CPU Game Math Performance 9.6 billion dot product operations per second
Custom ATI Graphics Processor 10 MB of embedded DRAM
48-way parallel floating-point dynamically scheduled shader pipelines
Unified shader architecture
Polygon Performance 500 million triangles per second
Pixel Fill Rate 16 gigasamples per second fill rate using 4x MSAA
Shader Performance 48 billion shader operations per second
Memory 512 MB of 700 MHz GDDR3 RAM
Unified memory architecture
Memory Bandwidth 22.4 GB/s memory interface bus bandwidth
256 GB/s memory bandwidth to EDRAM
21.6 GB/s front-side bus
Overall System Floating-Point Performance 1 teraflop
Storage Detachable and upgradeable 20GB hard drive
12x dual-layer DVD-ROM
Memory Unit support starting at 64 MB
I/O Support for up to four wireless game controllers
Three USB 2.0 ports
Two memory unit slots
Optimized for Online Instant, out-of-the-box access to Xbox Live features with broadband service, including Xbox Live Marketplace for downloadable content, gamer profile for digital identity, and voice chat to talk to friends while playing games, watching movies, or listening to music
Built-in Ethernet port
Wi-Fi ready: 802.11a, 802.11b, and 802.11g
Video camera ready
Digital Media Support Support for DVD-Video, DVD-ROM, DVD-R/RW, DVD+R/RW, CD-DA, CD-ROM, CD-R, CD-RW, WMA CD, MP3 CD, JPEG Photo CD
Ability to stream media from portable music devices, digital cameras and Windows XP-based PCs
Ability to rip music to the Xbox 360 hard drive
Custom playlists in every game
Built-in Media Center Extender for Windows XP Media Center Edition 2005
Interactive, full-screen 3-D visualizers
High-Definition Game Support All games supported at 16:9, 720p, or 1080i, with anti-aliasing
Standard-definition and high-definition video output supported
Audio Multi-channel surround sound output
Supports 48KHz 16-bit audio
320 independent decompression channels
32-bit audio processing
Over 256 audio channels
Physical Specs Height: 83 mm
Width: 309 mm
Depth: 258 mm
Weight: 7.7 lbs.
System Orientation Stands vertically or horizontally
Customizable Face Plates Interchangeable to personalize the console
Xbox 360 System Performance Specifications
Custom IBM PowerPC-based CPU Three symmetrical cores running at 3.2 GHz each
Two hardware threads per core; six hardware threads total
VMX-128 vector unit per core; three total
128 VMX-128 registers per hardware thread
1 MB L2 cache
CPU Game Math Performance 9.6 billion dot product operations per second
Custom ATI Graphics Processor 10 MB of embedded DRAM
48-way parallel floating-point dynamically scheduled shader pipelines
Unified shader architecture
Polygon Performance 500 million triangles per second
Pixel Fill Rate 16 gigasamples per second fill rate using 4x MSAA
Shader Performance 48 billion shader operations per second
Memory 512 MB of 700 MHz GDDR3 RAM
Unified memory architecture
Memory Bandwidth 22.4 GB/s memory interface bus bandwidth
256 GB/s memory bandwidth to EDRAM
21.6 GB/s front-side bus
Overall System Floating-Point Performance 1 teraflop
Storage Detachable and upgradeable 20GB hard drive
12x dual-layer DVD-ROM
Memory Unit support starting at 64 MB
I/O Support for up to four wireless game controllers
Three USB 2.0 ports
Two memory unit slots
Optimized for Online Instant, out-of-the-box access to Xbox Live features with broadband service, including Xbox Live Marketplace for downloadable content, gamer profile for digital identity, and voice chat to talk to friends while playing games, watching movies, or listening to music
Built-in Ethernet port
Wi-Fi ready: 802.11a, 802.11b, and 802.11g
Video camera ready
Digital Media Support Support for DVD-Video, DVD-ROM, DVD-R/RW, DVD+R/RW, CD-DA, CD-ROM, CD-R, CD-RW, WMA CD, MP3 CD, JPEG Photo CD
Ability to stream media from portable music devices, digital cameras and Windows XP-based PCs
Ability to rip music to the Xbox 360 hard drive
Custom playlists in every game
Built-in Media Center Extender for Windows XP Media Center Edition 2005
Interactive, full-screen 3-D visualizers
High-Definition Game Support All games supported at 16:9, 720p, or 1080i, with anti-aliasing
Standard-definition and high-definition video output supported
Audio Multi-channel surround sound output
Supports 48KHz 16-bit audio
320 independent decompression channels
32-bit audio processing
Over 256 audio channels
Physical Specs Height: 83 mm
Width: 309 mm
Depth: 258 mm
Weight: 7.7 lbs.
System Orientation Stands vertically or horizontally
Customizable Face Plates Interchangeable to personalize the console
