Pentium D 820 vs Pentium D 945

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Primary details

Comparing Pentium D 945 and Pentium D 820 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the rankingnot ratednot rated
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorDesktop processor
Seriesno dataPentium D
Architecture codenamePresler (2005−2007)Smithfield (2005)
Release date23 July 2006 (18 years ago)May 2005 (19 years ago)
Launch price (MSRP)$163no data

Detailed specifications

Pentium D 945 and Pentium D 820 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores2 (Dual-core)2 (Dual-core)
Threads22
Base clock speed3.4 GHz2.8 GHz
Boost clock speed3.4 GHz2.8 GHz
Bus rateno data800 MHz
L1 cache16 KB (per core)28 KB
L2 cache2 MB (per die)2 MB
L3 cache0 KB0 KB
Chip lithography65 nm90 nm
Die size2x 81 mm2206 mm2
Maximum core temperatureno data64 °C
Maximum case temperature (TCase)63 °Cno data
Number of transistors376 million169 million
64 bit support++
Windows 11 compatibility--
VID voltage range1.2V-1.3375V1.2V-1.4V

Compatibility

Information on Pentium D 945 and Pentium D 820 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration12
SocketLGA775,PLGA775PLGA775
Power consumption (TDP)95 Watt95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 945 and Pentium D 820. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)+-
Turbo Boost Technology--
Hyper-Threading Technology--
Idle States++
Demand Based Switching--
PAE32 Bit32 Bit
FSB parity--

Security technologies

Pentium D 945 and Pentium D 820 technologies aimed at improving security, for example, by protecting against hacks.

TXT--
EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium D 945 and Pentium D 820 are enumerated here.

VT-d--
VT-x--

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 945 and Pentium D 820. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR1, DDR2, DDR3DDR1, DDR2, DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardOn certain motherboards (Chipset feature)no data

Pros & cons summary


Chip lithography 65 nm 90 nm

Pentium D 945 has a 38.5% more advanced lithography process.

We couldn't decide between Pentium D 945 and Pentium D 820. We've got no test results to judge.


Should you still have questions on choice between Pentium D 945 and Pentium D 820, ask them in Comments section, and we shall answer.

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Intel Pentium D 945
Pentium D 945
Intel Pentium D 820
Pentium D 820

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Community ratings

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3.5 229 votes

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Questions & comments

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