Xeon w7-2555X vs Pentium D 945

Primary details

Comparing Pentium D 945 and Xeon w7-2555X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Architecture codename	Presler (2005−2007)	Sapphire Rapids (2023−2024)
Release date	23 July 2006 (18 years ago)	24 August 2024 (less than a year ago)
Launch price (MSRP)	$163	$1,069

Detailed specifications

Pentium D 945 and Xeon w7-2555X 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 cores	2 (Dual-core)	14 (Tetradeca-Core)
Threads	2	28
Base clock speed	3.4 GHz	3.3 GHz
Boost clock speed	3.4 GHz	4.8 GHz
L1 cache	16 KB (per core)	80 KB (per core)
L2 cache	2 MB (per die)	2 MB (per core)
L3 cache	0 KB	33.75 MB
Chip lithography	65 nm	10 nm
Die size	2x 81 mm2	no data
Maximum case temperature (TCase)	63 °C	75 °C
Number of transistors	376 million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	-	+
VID voltage range	1.2V-1.3375V	no data

Compatibility

Information on Pentium D 945 and Xeon w7-2555X 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 configuration	1	1
Socket	LGA775,PLGA775	4677
Power consumption (TDP)	95 Watt	210 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 945 and Xeon w7-2555X. You'll probably need this information if you require some particular technology.

AES-NI	-	+
AVX	-	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
TSX	-	+
Idle States	+	no data
Demand Based Switching	-	no data
PAE	32 Bit	no data
FSB parity	-	no data

Security technologies

Pentium D 945 and Xeon w7-2555X technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium D 945 and Xeon w7-2555X are enumerated here.

VT-d	-	+
VT-x	-	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 945 and Xeon w7-2555X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

N/A

Peripherals

Specifications and connection of peripherals supported by Pentium D 945 and Xeon w7-2555X.

PCIe version	no data	5.0
PCI Express lanes	no data	64

Pros & cons summary

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Recency	23 July 2006	24 August 2024
Physical cores	2	14
Threads	2	28
Chip lithography	65 nm	10 nm
Power consumption (TDP)	95 Watt	210 Watt

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Should you still have questions on choice between Pentium D 945 and Xeon w7-2555X, ask them in Comments section, and we shall answer.

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