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Intel® Celeron® D Processor

The Intel® Celeron® D processor on 90 nm process in the 478-pin package and in the FC-LGA775 Land package expands Intel's processor family into value-priced PC market segments. Celeron D processors offer exciting new technologies at a great value. The Celeron D processors include a larger integrated L2 cache and faster processor system bus when compared to Celeron processors. The Celeron D processor is built on the foundation of Intel's successful engineering and manufacturing leadership with Intel's commitment of technology, quality and reliability to value-priced PC market segments. The Celeron D processors provide customers the capability to affordably get onto the Internet, utilize educational programs, home-office software and productivity applications with great computing and multimedia power.

Product Highlights
Where applicable, the following sections highlight the advancements present in the 90 nm technology based Celeron D processor.
Celeron D processors 350, 345, 340, 335, 330, 325 and 320 on socket mPGA478 are available. Celeron D processors 351, 346, 341, 336, 331 and 326 in the FC-LGA775 Land package are also available.
Celeron processors available at speeds ranging from 1A GHz to 2.80 GHz.
Celeron D processors 533 MHz multi-transaction processor system bus with 256-KB Level 2 cache.
Celeron processors 400 MHz multi-transaction processor system bus on processors at 1.70 GHz to 2.80 GHz frequencies.
Celeron D processors have Advanced Dynamic Execution technology.
Celeron processors have Dynamic Execution technology.
Intel Streaming SIMD Extensions.
Integrated Level 1 cache.
Integrated Level 2 cache.
Intel® chipset support is determined by processor frequency. Please refer to the value platform web site for assistance.
Fully compatible with existing Intel® Architecture-based software.
Intel Celeron D processors in the FC-LGA775 Land package also support Execute Disable Bit Capability.
Select Intel Celeron D processors support Intel� EM64T. See below for details.
  1.70 and 1.80 GHz 2 through 2.80 GHz Intel® Celeron® D Processor
FC-PGA2 478-pin package (w/ Integrated Heat Spreader) X X X
FC-LGA4 775-land package (w/ Integrated Heat Spreader)     X
0.13 Micron Technology   X  
0.18 Micron Technology X    
90 nm Technology     X
400 MHz System Bus X X  
533 MHz System Bus     X
16-KB Level 1 Cache     X
8-KB Level 1 Data Cache X X  
12-K decoded micro-ops Execution Trace Cache X X X
128-KB Level 2 Advanced Transfer Cache (full-speed) X X  
256-KB Level 2 Advanced Transfer Cache (full-speed)     X
Advanced System Buffering X X X
64-GB Memory Addressability X X X
4-GB Memory Cacheability X X X
Streaming SIMD Extensions 3     X
Streaming SIMD Extensions 2 X X X
Streaming SIMD Extensions X X X
Dual Independent Bus Architecture X X X
Dynamic Execution X X X
Hyper Pipeline Technology X X X
Rapid Execution Engine X X X
Execute Disable Bit¹    
Intel® EM64T2²    

Note: The Celeron D processors require an electrically compatible board. Please contact your board manufacturer for compatibility.

¹ Available on Celeron® D processors in the FC-LGA775 Land package.
² Available on Celeron® D processors in the FC-LGA775 Land package: 326, 331, 336, 341, 346 and 351.

Intel's Streaming SIMD Extensions

The Internet Streaming SIMD Extensions consist of 70 instructions and includes single instruction, multiple data for floating-point, additional SIMD-integer and cache ability control instructions. Some of the benefits to desktop and Internet applications of Internet Streaming SIMD Extensions include:

Intel's Streaming SIMD Extensions 2 and 3

With the introduction of SSE2, the Intel NetBurst® microarchitecture extended the SIMD capabilities that MMX technology and SSE technology delivered by adding 144 instructions. The next-generation 90 nm process-based Celeron D processor introduces the Streaming SIMD Extensions 3 (SSE3), which includes 13 additional SIMD instructions over SSE2. The 13 new instructions in SSE3 are primarily designed to improve specific application areas such as media and gaming.

Higher resolution and quality images can be viewed and manipulated than previously possible.
High-quality audio, MPEG2 video, and simultaneous MPEG2 encoding and decoding.
Reduced CPU utilization for speech recognition, as well as higher accuracy and faster response times.
Streaming SIMD Extensions 2 (SSE2) instructions on Celeron processor.
Streaming SIMD Extensions 3 (SSE3) instructions on Celeron D processor.
Level 1 Execution Trace Cache

The Intel Celeron D processor features 16-KB data cache compared to 8-KB on the Intel Celeron processors. In addition to the data cache, the Intel Celeron D processor includes an Execution Trace Cache that stores up to 12-K decoded micro-ops in the order of program execution. This increases performance by removing the decoder from the main execution loop and makes more efficient usage of the cache storage space since instructions that are branched around are not stored. The result is a means to deliver a high volume of instructions to the processor's execution units and a reduction in the overall time required to recover from branches that have been mispredicted.

Non-Blocking Level 1 Cache

The Celeron processor includes two, separate 16-KB level 1 (L1) caches: one for instruction and one for data. The L1 cache provides fast access to the recently used data, increasing the overall performance of the system.

Level 2 Advanced Transfer Cache

The Advanced Transfer Cache (ATC) consists of microarchitectural improvements to provide a higher data bandwidth interface between the Level 2 cache and the processor core that is completely scaleable with the processor core frequency.

Features of the ATC include:

Non-Blocking, full speed, on-die Level 2 cache
Reduced latency interface to cache data (as compared to discrete caches)
256-KB Level 2 Advanced Transfer Cache

The Intel Celeron D processor features 256-KB L2 Advanced Transfer Cache (ATC) compared to 128-KB on the Intel Celeron processor. The Level 2 ATC delivers a much higher data throughput channel between the Level 2 cache and the processor core.

Other Significant Features
Celeron processors are available in the Flip-Chip Pin Grid Array (FC-PGA) and the Flip-Chip Pin Grid Array 2 (FC-PGA2) package with an Integrated Heat Spreader (see Table 1, above).
100 MHz system bus for the Celeron processors from 1A GHz to 1.40 GHz.
400 MHz system bus for the Celeron processor at 1.70 GHz to 2.80 GHz.
533 MHz system bus for the Celeron D processors.
A pipelined Floating-Point Unit (FPU) for supporting the 32-bit and 64-bit formats specified in IEEE standard 754, as well as an 80-bit format.
Parity-protected address/request and response system bus signals with a retry mechanism for high data integrity and reliability.
Testing and Performance Monitoring Features
Built-in Self Test (BIST), provides single stuck-at fault coverage of the microcode and large PLAs, as well as testing of the instruction cache, data cache, Translation Lookaside Buffers (TLBs) and ROMs.
IEEE 1149.1 Standard Test Access Port and Boundary Scan Architecture mechanism, allows testing of the Celeron processor through a standard interface.
Internal performance counters can be used for performance monitoring and event counting.

The Intel® Celeron® or Celeron® D processor may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request.

Δ Intel processor numbers are not a measure of performance. Processor numbers differentiate features within each processor family, not across different processor families. See for details.

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