Processor/Memory Subsystem

Figure 3-2 illustrates the basic internal architecture of an Intel Pentium single-core processor. Dual-core processors feature two cores operating in parallel. The table below provides a representative listing of supported processors. Other models may also be supported.

 

 

 

 

 

 

 

 

 

In

tel Pentium Single Core Pro

cessor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Branch

 

16-K Execution

 

 

128-bit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Prediction

 

 

Trace Cache

 

 

 

Integer

 

 

8-K

 

 

L2

 

 

 

 

 

 

 

 

 

 

 

 

CPU

 

 

 

 

FPU

 

 

L1

 

Adv..

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CacheData

 

Transfer

 

 

 

 

 

 

 

 

Rapid Exe. Eng.

Out-of-Order

 

 

 

 

 

 

Cache

 

Cache

 

 

 

 

 

 

 

 

 

 

FSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ALUs

 

 

Core

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I/F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Core speed

 

 

 

 

 

 

FSB speed

 

 

 

 

 

 

 

ALU Speed (Core speed x2)

 

 

 

 

 

 

 

 

 

 

 

 

 

(max. data transfer rate)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Intel Model

 

Dual

 

 

Core

 

 

 

FSB

 

 

L2 Cache

 

 

Hyper-Threading

No.

 

Core?

 

Speed

 

 

Speed

 

 

Size

 

 

 

 

Technology?

E6700

 

Yes

 

2.66 GHz

 

1066 MHz

 

 

4 MB

 

 

 

No

E6600

 

Yes

 

2.40 GHz

 

1066 MHz

 

 

4 MB

 

 

 

No

E6400

 

Yes

 

2.13 GHz

 

1066 MHz

 

 

2 MB

 

 

 

No

E6300

 

Yes

 

1.86 GHz

 

1066 MHz

 

 

2 MB

 

 

 

No

965

 

 

 

Yes

 

3.73 GH

 

1066 MHz

 

 

2 x 2 MB

 

 

 

Yes

960

 

 

 

Yes

 

3.60 GHz

 

800 MHz

 

 

2 x 2 MB

 

 

 

No

955

 

 

 

Yes

 

3.46 GHz

 

1066 MHz

 

 

2 x 2 MB

 

 

 

Yes

950

 

 

 

Yes

 

3.40 GHz

 

800 MHz

 

 

2 x 2 MB

 

 

 

No

940

 

 

 

Yes

 

3.20 GHz

 

800 MHz

 

 

2 x 2 MB

 

 

 

No

930

 

 

 

Yes

 

3.00 GHz

 

800 MHz

 

 

2 x 2 MB

 

 

 

No

920

 

 

 

Yes

 

2.80 GHz

 

800 MHz

 

 

2 x 2 MB

 

 

 

No

840

 

 

 

Yes

 

3.20 GHz

 

800 MHz

 

 

2 x 1 MB

 

 

 

No

672

 

 

 

No

 

3.80 GHz

 

800 MHz

 

 

2 MB

 

 

 

Yes

670

 

 

 

No

 

3.80 GHz

 

800 MHz

 

 

2 MB

 

 

 

Yes

660

 

 

 

No

 

3.60 GHz

 

800 MHz

 

 

2 MB

 

 

 

Yes

650

 

 

 

No

 

3.40 GHz

 

800 MHz

 

 

2 MB

 

 

 

Yes

640

 

 

 

No

 

3.20 GHz

 

800 MHz

 

 

2 MB

 

 

 

Yes

630

 

 

 

No

 

3.00 GHz

 

800 MHz

 

 

2 MB

 

 

 

Yes

Figure 3-2. Supported Pentium and Core 2 Duo Processors (partial listing)

The Intel Pentium processor increases processing speed by using higher clock speeds with hyper-pipelined technology, therefore handling significantly more instructions at a time. The Arithmetic Logic Units (ALUs) of all processors listed above run at twice the core speed.

An improved branch prediction mechanism features an execution trace cache and a refined prediction algorithm. The execution trace cache can store 12 kilobytes of micro-ops (decoded instructions dealing with branching sequences) that are checked when re-occurring branches are processed. Code that is not executed (bypassed) is no longer stored in the L1 cache as was the case in earlier generation Pentium processors.

The Pentium processor is compatible with software written for x86 processors. These systems also support the Intel Celeron D processors and the energy-efficient Intel CoreT M 2 Duo processors.

 

Technical Reference Guide

www.hp.com

3-3