Inside the PSP: Hardware Architecture & Components (All Models)

The PlayStation Portable (PSP) was a marvel of 2004 miniaturization. Here's the component breakdown across models (1000, 2000, 3000, Go, Street/E1000).

Core Processing

• Main CPU: MIPS R4000-based "Allegrex" (32-bit, 1–333 MHz). Scalar integer + FPU. Runs game logic, OS.
• Media Engine: Second Allegrex CPU (dedicated). Handles video/audio decode (MPEG-4 AVC/H.264, AAC, ATRAC3+), reducing main CPU load.
• GPU: "GTE" (Geometry Transformation Engine) + Rasterizer. 33 MHz. 33M polygons/sec (theoretical). No programmable shaders (fixed function: T&L, lighting, alpha test). 2 MB eDRAM embedded VRAM (framebuffer, textures, z-buffer).
• System RAM: 32 MB (1000/2000/3000/Go) / 16 MB (Street/E1000). Main memory for game assets, framebuffer overflow.
• Embedded DRAM (eDRAM): 4 MB (1000/2000/3000/Go) / 2 MB (Street). GPU-only high-bandwidth buffer.

Storage & Media

• UMD Drive (1000–3000): 1.8 GB (single layer) / 1.8 GB (dual layer) proprietary optical disc. 9 MB/s max read. Loud, battery-heavy, fragile.
• Memory Stick PRO Duo Slot: Primary removable storage (saves, photos, music, homebrew). Max official support 32 GB (MS Pro-HG Duo). Adapters for microSD work.
• Internal Flash (2000/3000/Go): 64 MB (2000/3000) / 16 GB (Go) for OS, browser cache, PS1 saves.

Display & Input

• Screen: 4.3" 16:9 TFT LCD (480×272). 1000: Ghosting. 2000: Improved. 3000: Wider gamut, anti-glare (scanline artifacts). Go: 3.8", same res.
• Controls: D-Pad, Face (△○×□), L/R, Analog Nub (1000–3000), Home, Start/Select, Volume, Brightness, Hold.
• Audio: Stereo speakers (mono on 1000), 3.5mm jack, Internal Mic (2000+), Remote control port (1000/2000).