Introduction

Pentium D is a dual-core version of Pentium 4, and Pentium Extreme Edition is a Pentium D with Hyper-Threading technology enabled. Pentium D and Pentium Extreme Edition CPUs can be found using two different core versions: Smithfield and Presler. In this tutorial we will talk about these two core versions and we will also list all Pentium D and Pentium Extreme Edition models released to date.

Pentium D and Pentium Extreme Edition are based on Intel’s 7th generation microarchitecture, a.k.a. Netburst. I.e. besides their different name, Pentium D and Pentium Extreme Edition are internally a Pentium 4. The basic difference between Pentium D and Pentium Extreme Edition is the absence of the Hyper-Threading technology on Pentium D.

Do not confuse Pentium Extreme Edition with Pentium 4 Extreme Edition. The former is a dual-core processor, while the later is a single-core CPU.

For an in-depth understanding of Pentium D and Pentium Extreme Edition, we suggest you to read the following tutorials: Intel Dual Core Technology, Inside Pentium 4 Architecture and All Pentium 4 Models, this one if you wish to compare Pentium D’s technical specs to Pentium 4’s.

Now let’s talk about all Pentium D and Pentium Extreme Edition models released so far.

Smithfield

Pentium D and Pentium Extreme Edition processors from 800 series are based on Smithfield die, which is simply two Prescott chips assembled together, as you can see in Figure 1. It has 230 million transistors occupying an area of 206 mm2 (0.319 sq inch) and manufactured using 90-nm technology.

click to enlarge
Figure 1: Smithfield die.

The main specifications for Pentium D and Pentium Extreme Edition 800 series are the following:

• Dual-core technology
• 16 KB L1 data cache
• 2 MB L2 memory cache (1 MB per core)
• 800 MHz external bus (200 MHz transferring four data per clock cycle), 533 MHz external bus on Pentium D 805 (133 MHz transferring four data per clock cycle).
• SSE3 instruction set support
• Socket 775
• 90-nm manufacturing process
• EM64T 64-bit Technology
• Execute Disable Technology
• Enhanced SpeedStep Technology (only on 840 and 830 models)
• Hyper-Threading technology on Pentium Extreme Edition (Pentium D doesn’t have this feature).

In the table below you can find all Pentium D (listed as “Hyper Threading: No”) and Pentium Extreme Edition (listed as “Hyper Threading: Yes”) from 800 series released to date.

Model	sSpec	Internal Clock	External Clock	TDP	Max. Temp (º C)	Hyper-Threading
840	SL8FK	3.20 GHz	800 MHz	130 W	69.8	Yes
840	SL88R	3.20 GHz	800 MHz	130 W	69.8	No
840	SL8CM	3.20 GHz	800 MHz	130 W	69.8	No
830	SL8CN	3 GHz	800 MHz	130 W	69.8	No
830	SL88S	3 GHz	800 MHz	130 W	69.8	No
820	SL88T	2.80 GHz	800 MHz	95 W	64.1	No
820	SL8CP	2.80 GHz	800 MHz	95 W	64.1	No
805	SL8ZH	2.66 GHz	533 MHz	95 W	64.1	No

Presler

Pentium D and Pentium Extreme Edition 900 series CPUs are based on Presler die, which has 376 million transistors occupying an area of 162 mm2 (0.25 sq inch) and manufactured using 65-nm technology.

click to enlarge
Figure 2: Presler die.

The main specifications for Pentium D and Pentium Extreme Edition 900 series are the following:

• Dual-core technology
• 16 KB L1 data cache
• 4 MB L2 memory cache (2 MB per core)
• 800 MHz external bus (200 MHz transferring four data per clock cycle) on Pentium D or 1,066 MHz external bus (266 MHz transferring four data per clock cycle) on Pentium Extreme Edition.
• SSE3 instruction set support
• Socket 775
• 65-nm manufacturing process
• Virtualization Technology
• EM64T 64-bit Technology
• Execute Disable Technology
• Enhanced SpeedStep Technology
• Hyper-Threading technology on Pentium Extreme Edition (Pentium D doesn’t have this feature).

In the table below you can find all Pentium D (listed as “Hyper Threading: No”) and Pentium Extreme Edition (listed as “Hyper Threading: Yes”) from 900 series released to date.

Model	sSpec	Internal Clock	External Clock	TDP	Max. Temp. (º C)	Hyper-Threading
965	SL9AN	3.73 GHz	1,066 MHz	130 W	68.6	Yes
960	SL9K7	3.60 GHz	800 MHz	95 W	63.4	No
960	SL9AP	3.60 GHz	800 MHz	130 W	68.6	No
955	SL94N	3.46 GHz	1,066 MHz	130 W	68.6	Yes
950	SL95V	3.40 GHz	800 MHz	95 W	63.4	No
950	SL9K8	3.40 GHz	800 MHz	95 W	63.4	No
945	SL9QQ	3.40 GHz	800 MHz	95 W	63.4	No
945	SL9QB	3.40 GHz	800 MHz	95 W	63.4	No
950	SL94P	3.40 GHz	800 MHz	130 W	68.6	No
940	SL95W	3.20 GHz	800 MHz	95 W	63.4	No
940	SL94Q	3.20 GHz	800 MHz	130 W	68.6	No
935	SL9QR	3.20 GHz	800 MHz	95 W	63.4	No
925	SL9KA	3 GHz	800 MHz	95 W	63.4	No
930	SL94R	3 GHz	800 MHz	95 W	63.4	No
930	SL95X	3 GHz	800 MHz	95 W	63.4	No
925	SL9D9	3 GHz	800 MHz	95 W	63.4	No
915	SL9KB	2.80 GHz	800 MHz	95 W	63.4	No
915	SL9DA	2.80 GHz	800 MHz	95 W	63.4	No
920	SL94S	2.80 GHz	800 MHz	95 W	63.4	No