Talk:CELL BE

Cell Broadband Engine

Cell Broadband Engine
CPU with heatplate
CXD2992AGB

The Cell CPU has one 3.2Ghz PPE (Power Processor Element) with two threads and eight 3.2Ghz SPE (Synergistic Processing Elements).

The PPE is a general purpose CPU, while the eight SPE are geared towards processing data in parallel. One SPE is disabled to increase yield, so the PS3 can have at most 9 threads runnings at the same time (2 from PPE and 7 from SPE). Note that one SPE is reserved for the hypervisor, so PS3 programs can take advantage of 8 threads. Both the PPE and SPE of the Cell are 64 bit, and manipulate data in Big Endian.

Specifications

• 1 PPE (Power Processor Element)
  • 3.2Ghz
  • 64 bit, Big Endian
  • 2 threads (can run at same time)
  • L1 cache: 32kB data + 32kB instruction
  • L2 cache: 512kB
  • Memory bus width: 64bit (serial)
  • VMX (Altivec) instruction set support
  • Full IEEE-754 compliant
• 8 SPE (Synergistic Processing Element)
  • 3.2Ghz
  • 64 bit, Big Endian
  • 1 SPE disabled to improve chip yield (see: Unlocking the 8th SPE)
  • 1 SPE dedicated for hypervisor security
  • 256kB local store per SPE
  • 128 registers per SPE
  • Dual Issue (Each SPE can execute 2 instructions per clock)
  • IEEE-754 compliant in double precision (single precision round-towards-zero instead of round-towards-even)

There is a lot of info about CELL/BE on the Cell Programming IBM page.

Serial Numbers @ SKU

Cell Broadband Engine
Die map - 90nm

Cell Broadband Engine
Die map - 65nm

Cell Broadband Engine
Die map - 45nm

The Cell was introduced at 90nm. Later, PS3 model numbers starting with CECHG uses the 65nm version, while the PS3 Slim (CECH-20xx) used the 45nm version (See SKU Models and table below).

A sampling of the serial numbers by model number.

PS3 Model	CELL Serial	Die Tech	Total Die Size	Width x Length	SPU size	PPE Size
CECHA	CXD2964GB	90nm	235.48mm²	19.17mm x 12.29mm	14.76mm²	28.86mm²
CECHB	CXD2964GB	90nm	235.48mm²	19.17mm x 12.29mm	14.76mm²	28.86mm²
CECHC	CXD2964GB	90nm	235.48mm²	19.17mm x 12.29mm	14.76mm²	28.86mm²
CECHD	unreleased	90nm	235.48mm²	19.17mm x 12.29mm	14.76mm²	28.86mm²
CECHE	CXD29??	90nm	235.48mm²	19.17mm x 12.29mm	14.76mm²	28.86mm²
CECHF	unreleased	90nm	235.48mm²	19.17mm x 12.29mm	14.76mm²	28.86mm²
CECHG	CXD2981AGB	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHH	CXD2981GB	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHI	unreleased	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHJ	CXD2981GB	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHK	CXD2989AGB	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHL	CXD2990AGB	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHM	-?	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHN	unreleased	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHO	unreleased	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHP	-?	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECHQ	CXD299?	65nm	174.61mm²	15.59mm x 11.20mm	11.08mm²	19.60mm²
CECH-20xx	CXD2992AGB	45nm	115.46mm²	12.75mm x 9.06mm	6.47mm²	11.32mm²
CECH-21xx	CXD2992AGB	45nm	115.46mm²	12.75mm x 9.06mm	6.47mm²	11.32mm²
CECH-25xx	CXD2992GB	45nm	115.46mm²	12.75mm x 9.06mm	6.47mm²	11.32mm²
CECH-30xx	-?	45nm?	115.46mm²?	12.75mm x 9.06mm?	6.47mm²?	11.32mm²?

Source: http://www.edepot.com/playstation3.html#PS3_CELL_CPU

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