Sony PlayStation specs

Central processing unit
R3051
MIPS R3000A-compatible 32bit RISC chip running at 33.8688 MHz
The chip is manufactured by LSI Logic Corp. with technology licensed from SGI.
Features:
Operating performance of 30 MIPS
Bus bandwidth 132 MB/s
4 KB Instruction Cache
1 KB non-associative SRAM Data Cache
2 MB of main RAM

Geometry transformation engine
Resides inside the main CPU chip, giving it additional vector math instructions used for 3D graphics
Features:
Operating performance of 66 MIPS
360,000 flat-shaded polygons per second
180,000 texture mapped and light-sourced polygons per second
Theoretical polygon count in optimal conditions given by Sony:
1 million flat-shaded polygons per second;
500,000 texture mapped and light-sourced polygons per second.

Data decompression engine
Also residing within the main CPU, it is responsible for decompressing images and video.
Documented device mode is to read three RLE-encoded 16×16 macroblocks, run IDCT and assemble a single 16×16 RGB macroblock.
Output data may be transferred directly to GPU via DMA.
It is possible to overwrite IDCT matrix and some additional parameters, however MDEC internal instruction set was never documented.
Features:
Compatible with MJPEG and H.261 files
Operating Performance of 80 MIPS
Directly connected to CPU Bus

Graphics processing unit
Name unknown
Handles 2D graphics processing separate from the main 3D engine on the CPU
Features:
Maximum of 16.7 million colors (24-bit color depth)
Resolutions from 256x224 to 640x480
Adjustable frame buffer
Unlimited color lookup tables
Maximum of 4000 8x8 pixel sprites with individual scaling and rotation
Emulation of simultaneous backgrounds (for parallax scrolling)
Flat or Gouraud shading and texture mapping
1 MB of VRAM

Sound processing unit
Name unknown
Supports ADPCM sources with up to 24 channels
Sampling rate of up to 44.1 kHz
512 KB of memory

Other
CD-ROM drive
2x, with a maximum data throughput of 300 KB/s
XA Mode 2 Compliant
CD-DA (CD-Digital Audio)
32 KB buffer
Operation System
Stored on 512 KB ROM
Memory Card
128 KB of space in an EEPROM