Celeron N2840 vs B820

Primary details

Comparing Celeron B820 and Celeron N2840 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2873	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Celeron	Intel Celeron
Power efficiency	1.35	no data
Architecture codename	Sandy Bridge (2011−2013)	Bay Trail-M (2013−2014)
Release date	1 July 2012 (12 years ago)	22 May 2014 (10 years ago)
Launch price (MSRP)	$86	no data

Detailed specifications

Celeron B820 and Celeron N2840 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	2.16 GHz
Boost clock speed	1.7 GHz	2.58 GHz
Bus type	DMI 2.0	no data
Bus rate	4 × 5 GT/s	no data
Multiplier	17	no data
L1 cache	64K (per core)	56K (per core)
L2 cache	256K (per core)	512K (per core)
L3 cache	2 MB (shared)	0 KB
Chip lithography	32 nm	22 nm
Die size	131 mm2	no data
Maximum core temperature	100 °C	100 °C
Number of transistors	504 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Celeron B820 and Celeron N2840 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)	1
Socket	FCPGA988,PGA988	FCBGA1170
Power consumption (TDP)	35 Watt	7.5 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron B820 and Celeron N2840. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	no data
FMA	+	-
Enhanced SpeedStep (EIST)	+	+
My WiFi	-	no data
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	-
Idle States	+	+
Thermal Monitoring	+	-
Flex Memory Access	+	no data
Demand Based Switching	-	no data
Smart Connect	no data	+
FDI	+	no data
Fast Memory Access	+	no data

Security technologies

Celeron B820 and Celeron N2840 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron B820 and Celeron N2840 are enumerated here.

VT-d	-	-
VT-x	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Celeron B820 and Celeron N2840. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	16 GB	8 GB
Max memory channels	2	2
Maximum memory bandwidth	21.335 GB/s	21.32 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® HD Graphics for 2nd Generation Intel® Processors	Intel® HD Graphics for Intel Atom® Processor Z3700 Series
Quick Sync Video	-	+
Clear Video HD	-	-
Graphics max frequency	1.05 GHz	792 MHz
InTru 3D	-	-

Graphics interfaces

Available interfaces and connections of Celeron B820 and Celeron N2840 integrated GPUs.

Number of displays supported	2	2
eDP	+	no data
DisplayPort	+	-
HDMI	+	-
SDVO	+	no data
CRT	+	no data

Peripherals

Specifications and connection of peripherals supported by Celeron B820 and Celeron N2840.

PCIe version	2.0	2.0
PCI Express lanes	16	4
USB revision	no data	3.0 and 2.0
Total number of SATA ports	no data	2
Number of USB ports	no data	5

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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Recency	1 July 2012	22 May 2014
Chip lithography	32 nm	22 nm
Power consumption (TDP)	35 Watt	7 Watt

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Should you still have questions on choice between Celeron B820 and Celeron N2840, ask them in Comments section, and we shall answer.

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