Pentium D 840 vs Celeron 3865U

Primary details

Comparing Celeron 3865U and Pentium D 840 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2575	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Desktop processor
Series	Intel Celeron	no data
Power efficiency	5.23	no data
Architecture codename	Kaby Lake-U (2017)	Smithfield (2005)
Release date	3 January 2017 (7 years ago)	May 2005 (19 years ago)
Launch price (MSRP)	$107	no data

Detailed specifications

Celeron 3865U and Pentium D 840 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	1.8 GHz	3.2 GHz
Boost clock speed	1.8 GHz	3.2 GHz
Bus type	OPI	no data
Bus rate	4 GT/s	no data
Multiplier	22	no data
L1 cache	128 KB	28 KB
L2 cache	512 KB	2 MB
L3 cache	2 MB (shared)	0 KB
Chip lithography	14 nm	90 nm
Die size	98.7 mm2	206 mm2
Maximum core temperature	100 °C	70 °C
Number of transistors	no data	169 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	no data	1.2V-1.4V

Compatibility

Information on Celeron 3865U and Pentium D 840 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 (Uniprocessor)	2
Socket	FCBGA1356,FPBGA1356	PLGA775
Power consumption (TDP)	15 Watt	130 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron 3865U and Pentium D 840. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	no data
AES-NI	+	-
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	no data
My WiFi	+	no data
Turbo Boost Technology	-	-
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	+	-
Flex Memory Access	+	no data
Smart Response	+	no data
Demand Based Switching	no data	-
PAE	no data	32 Bit
FSB parity	no data	-

Security technologies

Celeron 3865U and Pentium D 840 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	-
EDB	+	+
Secure Key	+	no data
MPX	+	-
SGX	Yes with Intel® ME	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron 3865U and Pentium D 840 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Celeron 3865U and Pentium D 840. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3, DDR4	DDR1, DDR2, DDR3
Maximum memory size	32 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	34.134 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel HD Graphics 610	no data
Max video memory	32 GB	no data
Quick Sync Video	+	-
Clear Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	900 MHz	no data

Graphics interfaces

Available interfaces and connections of Celeron 3865U and Pentium D 840 integrated GPUs.

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

Graphics image quality

Maximum display resolutions supported by Celeron 3865U and Pentium D 840 integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096x2304@24Hz	no data
Max resolution over eDP	4096x2304@60Hz	no data
Max resolution over DisplayPort	4096x2304@60Hz	no data

Graphics API support

APIs supported by Celeron 3865U and Pentium D 840 integrated GPUs, sometimes API versions are included.

DirectX	12	no data
OpenGL	4.4	no data

Peripherals

Specifications and connection of peripherals supported by Celeron 3865U and Pentium D 840.

PCIe version	2.0	no data
PCI Express lanes	16	no data

Pros & cons summary

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Chip lithography	14 nm	90 nm
Power consumption (TDP)	15 Watt	130 Watt

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