Tech Specs:

• Main Processor: Sony CXD2962GG
• Processor Speed: 1-333MHz (222MHz Default)
• Resolution: 480 x 272 pixels
• Colors on screen: 16.77 Million
• Screen Size: 4.3 Inches
• Audio: Media Engine Chip
• RAM: 32MB for PSP 1000 64MB for others 

Additional Notes:

Very Common check regarding analog stick and UMD Drive however.