Here are the tech specs for the GCN:
MPU ("Microprocessor Unit")* : Custom IBM Power PC "Gekko"
Manufacturing process : 0.18 micron IBM copper wire technology
Clock frequency : 485 MHz
CPU capacity : 1125 Dmips (Dhrystone 2.1)
Internal data precision : 32-bit Integer & 64-bit floating-point
External bus : 1.3GB/second peak bandwidth (32-bit address space, 64-bit data bus 162 MHz clock)
Internal cache L1: instruction 32KB, data 32KB (8 way) L2: 256KB (2 way)
System LSI : Custom ATI/Nintendo "Flipper"
Embedded frame buffer : Approx. 2MB sustainable latency : 6.2ns (1T-SRAM)
Embedded texture cache : Approx. 1MB sustainable latency : 6.2ns (1T-SRAM)
Texture read bandwidth : 10.4GB/second (Peak)
Main memory bandwidth : 2.6GB/second (Peak)
Pixel depth : 24-bit color, 24-bit Z buffer
Image processing functions : Fog, subpixel anti-aliasing, 8 hardware lights, alpha blending, virtual texture design, multi-texturing, bump mapping, environment mapping, MIP mapping, bilinear filtering, trilinear filtering, anisotropic filtering, real-time hardware texture decompression (S3TC), real-time decompression of display list, HW 3-line deflickering filter.
And for the DS:
Size (closed): 5.85" wide / 3.33" long / 1.13" tall
Upper Screen: Backlit, 3-inch, semitransparent reflective TFT color LCD with 256x192 pixel resolution and .24 mm dot pitch
Touch Screen: Same as upper screen, but with transparent analog touch screen
Color: Capable of displaying 260,000 colors
Wireless Communication: IEEE 802.11 and Nintendo's proprietary format; wireless range is 30 to 100 feet, depending on circumstances; multiple users can play multiplayer games using just one DS game card
Controls: Touch screen, embedded microphone for voice recognition, A/B/X/Y face buttons, plus control pad, L/R shoulder buttons, Start and Select buttons
Input/Output: Ports for both Nintendo DS game cards and Game Boy Advance Game Paks, terminals for stereo headphones and microphone
Other Features: Embedded PictoChat software that allows up to 16 users to chat at once; embedded real-time clock; date, time and alarm; touch-screen calibration
CPUs: One ARM9 and one ARM7
Sound: Stereo speakers providing virtual surround sound, depending on the software
Battery: Lithium ion battery delivering six to 10 hours of play on a four-hour charge, depending on use; power-saving sleep mode; AC adapter
Languages: English, Japanese, Spanish, French, German, Italian