Editing Talk:CELL BE

= Cell Broadband Engine =
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 ==

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 small sampling of the serial numbers by model number.
{| border="1" cellspacing="0" cellpadding="5" border="#999" class="wikitable" style="border:1px solid #999; border-collapse: collapse;" 
|- bgcolor="#cccccc"
! PS3 Model !! CELL Serial !! Die Tech !! Die Size
|-
| CECHA || CXD2964GB || 90nm || 235.48mm2
|-
| CECHC || CXD2964GB || 90nm || 235.48mm2
|-
| CECHE || CXD29?? || 90nm || 235.48mm2
|-
| CECHG || CXD2981AGB || 65nm || 174.61mm2
|-
| CECHH || CXD2981GB || 65nm || 174.61mm2
|-
| CECHK || CXD2989AGB || 65nm || 174.61mm2
|-
| CECHL || CXD2990AGB || 65nm || 174.61mm2
|-
| CECHQ || CXD299? || 65nm || 174.61mm2
|-
| CECH-20xx || CXD2992AGB || 45nm || ~115mm2
|-
| CECH-21xx || CXD2992AGB || 45nm || ~115mm2
|-
| CECH-25xx || CXD2992GB || 45nm || ~115mm2 
|-
|}
:





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

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