Pentium D 940 vs Pentium 3556U

Primary details

Comparing Pentium 3556U and Pentium D 940 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2755	3070
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Desktop processor
Series	Intel Pentium	no data
Power efficiency	4.19	0.25
Architecture codename	Haswell (2013−2015)	Presler (2005−2007)
Release date	1 September 2013 (11 years ago)	5 January 2006 (19 years ago)
Launch price (MSRP)	no data	$423

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium 3556U and Pentium D 940 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)	2 (Dual-core)
Threads	2	2
Base clock speed	1.7 GHz	3.2 GHz
Boost clock speed	1.7 GHz	3.2 GHz
Bus rate	5 GT/s	no data
L1 cache	64K (per core)	16 KB (per core)
L2 cache	256K (per core)	2 MB (per die)
L3 cache	2 MB (shared)	0 KB
Chip lithography	22 nm	65 nm
Die size	118 mm2	2x 81 mm2
Maximum core temperature	100 °C	no data
Maximum case temperature (TCase)	105 °C	69 °C
Number of transistors	1,400 million	376 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	no data	1.2V-1.3375V

Compatibility

Information on Pentium 3556U and Pentium D 940 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	FCBGA1168	LGA775,PLGA775
Power consumption (TDP)	15 Watt	130 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium 3556U and Pentium D 940. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	-
Idle States	+	+
Thermal Monitoring	+	-
Smart Response	-	no data
Demand Based Switching	no data	-
PAE	no data	32 Bit
GPIO	+	no data
Smart Connect	+	no data
FDI	-	no data
AMT	9.5	no data
Matrix Storage	-	no data
FSB parity	no data	-
HD Audio	+	no data
RST	+	no data

Security technologies

Pentium 3556U and Pentium D 940 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	-
EDB	+	+
Secure Key	+	no data
OS Guard	-	no data
Anti-Theft	-	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium 3556U and Pentium D 940 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium 3556U and Pentium D 940. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR1, DDR2, DDR3
Maximum memory size	16 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	25.6 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics for 4th Generation Intel Processors	On certain motherboards (Chipset feature)
Clear Video	+	no data
Graphics max frequency	1 GHz	no data

Graphics interfaces

Available interfaces and connections of Pentium 3556U and Pentium D 940 integrated GPUs.

Number of displays supported	3	no data
eDP	+	no data
DisplayPort	+	-
HDMI	+	-

Peripherals

Specifications and connection of peripherals supported by Pentium 3556U and Pentium D 940.

PCIe version	2.0	no data
PCI Express lanes	10	no data
PCI support	-	no data
USB revision	3.0	no data
Total number of SATA ports	2	no data
Max number of SATA 6 Gb/s Ports	2	no data
Integrated IDE	-	no data
Number of USB ports	4	no data
Integrated LAN	-	no data
UART	+	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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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	0.66	0.34
Recency	1 September 2013	5 January 2006
Chip lithography	22 nm	65 nm
Power consumption (TDP)	15 Watt	130 Watt

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Should you still have questions on choice between Pentium 3556U and Pentium D 940, ask them in Comments section, and we shall answer.

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