i7-975 Extreme Edition vs Pentium D 945

Primary details

Comparing Pentium D 945 and Core i7-975 Extreme Edition 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	Desktop processor
Series	no data	Intel Core i7EE
Architecture codename	Presler (2005−2007)	Nehalem (2008−2010)
Release date	23 July 2006 (18 years ago)	2 June 2009 (15 years ago)
Launch price (MSRP)	$163	no data

Detailed specifications

Pentium D 945 and Core i7-975 Extreme Edition 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)	4 (Quad-Core)
Threads	2	8
Base clock speed	3.4 GHz	no data
Boost clock speed	3.4 GHz	3.33 GHz
Bus type	no data	QPI
Bus rate	no data	6.4 GT/s
Multiplier	no data	25
L1 cache	16 KB (per core)	no data
L2 cache	2 MB (per die)	1 MB
L3 cache	0 KB	8 MB
Chip lithography	65 nm	45 nm
Die size	2x 81 mm2	263 mm2
Maximum case temperature (TCase)	63 °C	no data
Number of transistors	376 million	731 Million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	1.2V-1.3375V	no data

Compatibility

Information on Pentium D 945 and Core i7-975 Extreme Edition 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 (Uniprocessor)
Socket	LGA775,PLGA775	no data
Power consumption (TDP)	95 Watt	130 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 945 and Core i7-975 Extreme Edition. You'll probably need this information if you require some particular technology.

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

Security technologies

Pentium D 945 and Core i7-975 Extreme Edition technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium D 945 and Core i7-975 Extreme Edition are enumerated here.

VT-d	-	no data
VT-x	-	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 945 and Core i7-975 Extreme Edition. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	no data
Maximum memory size	no data	24 GB

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

no data

Pros & cons summary

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Recency	23 July 2006	2 June 2009
Physical cores	2	4
Threads	2	8
Chip lithography	65 nm	45 nm
Power consumption (TDP)	95 Watt	130 Watt

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