Pentium III 1266S vs i5-750

Primary details

Comparing Core i5-750 and Pentium III 1266S processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2095	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.14	no data
Market segment	Desktop processor	Desktop processor
Series	Core i5 (Desktop)	no data
Power efficiency	1.58	no data
Architecture codename	Lynnfield (2009−2010)	Tualatin (2000−2002)
Release date	8 September 2009 (15 years ago)	July 2001 (23 years ago)
Launch price (MSRP)	$150	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i5-750 and Pentium III 1266S 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	4 (Quad-Core)	1 (Single-Core)
Threads	4	1
Base clock speed	2.66 GHz	no data
Boost clock speed	3.2 GHz	1.27 GHz
Bus rate	2500 MHz	no data
L1 cache	64 KB (per core)	8 KB
L2 cache	256 KB (per core)	512 KB
L3 cache	8 MB (shared)	0 KB
Chip lithography	45 nm	130 nm
Die size	296 mm2	80 mm2
Maximum core temperature	73 °C	no data
Maximum case temperature (TCase)	no data	69 °C
Number of transistors	774 million	44 million
64 bit support	+	-
Windows 11 compatibility	-	-

Compatibility

Information on Core i5-750 and Pentium III 1266S 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	FCLGA1156,LGA1156	370
Power consumption (TDP)	95 Watt	30 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-750 and Pentium III 1266S. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	1.0	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Demand Based Switching	-	no data
PAE	36 Bit	no data

Security technologies

Core i5-750 and Pentium III 1266S 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 Core i5-750 and Pentium III 1266S are enumerated here.

VT-d	+	no data
VT-x	+	no data
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-750 and Pentium III 1266S. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	no data
Maximum memory size	16 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	21 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

no data

Peripherals

Specifications and connection of peripherals supported by Core i5-750 and Pentium III 1266S.

PCIe version	2.0	no data
PCI Express lanes	16	no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Pros & cons summary

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Physical cores	4	1
Threads	4	1
Chip lithography	45 nm	130 nm
Power consumption (TDP)	95 Watt	30 Watt

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Should you still have questions on choice between Core i5-750 and Pentium III 1266S, ask them in Comments section, and we shall answer.

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