Sony have detailed the technical specs for the NGP Hardware, no specific details have been released regarding the game cards. Its also been revealed that the GPU will be a quad core. Engadget say they've "...never seen a handheld this powerful"
CPU
ARM® Cortex™-A9 core (4 core)
GPU
SGX543MP4+ (4 Core)
External Dimensions
Approx. 182.0 x 18.6 x 83.5mm (width x height x depth) (tentative, excludes largest projection)
Screen
(Touch screen)
5 inches (16:9), 960 x 544, Approx. 16 million colors, OLED
Multi touch screen (capacitive type)
Rear touch pad
Multi touch pad (capacitive type)
Cameras
Front camera, Rear camera
Sound
Built-in stereo speakers
Built-in microphone
Sensors
Six-axis motion sensing system (three-axis gyroscope, three-axis accelerometer), Three-axis electronic compass
Location
Built-in GPS
Wi-Fi location service support
Keys / Switches
PS button
Power button
Directional buttons (Up/Down/Right/Left)
Action buttons (Triangle, Circle, Cross, Square)
Shoulder buttons (Right/Left)
Right stick, Left stick
START button, SELECT button
Volume buttons (+/-)
Wireless communications
Mobile network connectivity (3G)
IEEE 802.11b/g/n (n = 1x1)(Wi-Fi) (Infrastructure mode/Ad-hoc mode)
Bluetooth® 2.1+EDR (A2DP/AVRCP/HSP)
Additional Tech Specs From Engadget