Celeron B820 vs 2957U

Place in the ranking	2832	2867
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Celeron	Intel Celeron
Power efficiency	3.40	1.35
Architecture codename	Haswell (2013−2015)	Sandy Bridge (2011−2013)
Release date	1 January 2014 (10 years ago)	1 July 2012 (12 years ago)
Launch price (MSRP)	$107	$86

Detailed specifications

Celeron 2957U and Celeron B820 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	1.4 GHz	1.7 GHz
Boost clock speed	1.4 GHz	1.7 GHz
Bus type	no data	DMI 2.0
Bus rate	5 GT/s	4 × 5 GT/s
Multiplier	no data	17
L1 cache	128 KB	64K (per core)
L2 cache	512 KB	256K (per core)
L3 cache	2 MB	2 MB (shared)
Chip lithography	22 nm	32 nm
Die size	no data	131 mm²
Maximum core temperature	100 °C	100 °C
Number of transistors	no data	504 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Celeron 2957U and Celeron B820 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	FCBGA1168	FCPGA988,PGA988
Power consumption (TDP)	15 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron 2957U and Celeron B820. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2
FMA	-	+
Enhanced SpeedStep (EIST)	+	+
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	-
GPIO	+	no data
Smart Connect	+	no data
FDI	-	+
Fast Memory Access	no data	+
AMT	9.5	no data
Matrix Storage	-	no data
HD Audio	+	no data
RST	+	no data

Security technologies

Celeron 2957U and Celeron B820 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron 2957U and Celeron B820 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 2957U and Celeron B820. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3
Maximum memory size	16 GB	16 GB
Max memory channels	2	2
Maximum memory bandwidth	25.6 GB/s	21.335 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® HD Graphics for 4th Generation Intel® Processors	Intel® HD Graphics for 2nd Generation Intel® Processors
Quick Sync Video	+	-
Clear Video	+	no data
Graphics max frequency	1 GHz	1.05 GHz

Graphics interfaces

Available interfaces and connections of Celeron 2957U and Celeron B820 integrated GPUs.

Number of displays supported	3	2
eDP	+	+
DisplayPort	+	+
HDMI	+	+
SDVO	no data	+
CRT	no data	+

Peripherals

Specifications and connection of peripherals supported by Celeron 2957U and Celeron B820.

PCIe version	2.0	2.0
PCI Express lanes	10	16
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.

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.

Celeron 2957U 0.56
+7.7%

Celeron B820 0.52

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Celeron 2957U 854
+6.5%

Celeron B820 802

Gaming performance

Pros & cons summary

Performance score	0.56	0.52
Recency	1 January 2014	1 July 2012
Chip lithography	22 nm	32 nm
Power consumption (TDP)	15 Watt	35 Watt

Celeron 2957U has a 7.7% higher aggregate performance score, an age advantage of 1 year, a 45.5% more advanced lithography process, and 133.3% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Celeron 2957U and Celeron B820.

Should you still have questions on choice between Celeron 2957U and Celeron B820, ask them in Comments section, and we shall answer.