Intel Core i7-2640M vs Intel Celeron B840

Comparative analysis of Intel Core i7-2640M and Intel Celeron B840 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Graphics, Graphics interfaces, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s).

Intel Core i7-2640M

Intel Celeron B840

Differences

Reasons to consider the Intel Core i7-2640M

CPU is newer: launch date 5 month(s) later
2 more threads: 4 vs 2
Around 84% higher clock speed: 3.50 GHz vs 1.9 GHz
2x more L3 cache, more data can be stored in the L3 cache for quick access later
Around 70% better performance in PassMark - Single thread mark: 1495 vs 882
2.6x better performance in PassMark - CPU mark: 2466 vs 967
Around 72% better performance in Geekbench 4 - Single Core: 594 vs 345
2.1x better performance in Geekbench 4 - Multi-Core: 1292 vs 619

Specifications (specs)
Launch date	4 September 2011 vs 15 March 2011
Number of threads	4 vs 2
Maximum frequency	3.50 GHz vs 1.9 GHz
L3 cache	4096 KB vs 2048 KB
Benchmarks
PassMark - Single thread mark	1495 vs 882
PassMark - CPU mark	2466 vs 967
Geekbench 4 - Single Core	594 vs 345
Geekbench 4 - Multi-Core	1292 vs 619

Compare benchmarks

CPU 1: Intel Core i7-2640M
CPU 2: Intel Celeron B840

PassMark - Single thread mark

CPU 1

CPU 2

1495

882

PassMark - CPU mark

CPU 1

CPU 2

2466

967

Geekbench 4 - Single Core

CPU 1

CPU 2

594

345

Geekbench 4 - Multi-Core

CPU 1

CPU 2

1292

619

Name	Intel Core i7-2640M	Intel Celeron B840
PassMark - Single thread mark	1495	882
PassMark - CPU mark	2466	967
Geekbench 4 - Single Core	594	345
Geekbench 4 - Multi-Core	1292	619
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	2.073
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	34.77
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.233
CompuBench 1.5 Desktop - Video Composition (Frames/s)	0.801
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	2.127

Compare specifications (specs)

	Intel Core i7-2640M	Intel Celeron B840
Essentials
Architecture codename	Sandy Bridge	Sandy Bridge
Launch date	4 September 2011	15 March 2011
Launch price (MSRP)	$346	$86
Place in performance rating	2778	2787
Price now	$185.97
Processor Number	i7-2640M	B840
Series	Legacy Intel® Core™ Processors	Legacy Intel® Celeron® Processor
Status	Launched	Launched
Value for money (0-100)	6.23
Vertical segment	Mobile	Mobile
Performance
64 bit support
Base frequency	2.80 GHz	1.90 GHz
Bus Speed	5 GT/s DMI	5 GT/s DMI
Die size	149 mm	131 mm
L1 cache	128 KB	64 KB (per core)
L2 cache	512 KB	256 KB (per core)
L3 cache	4096 KB	2048 KB
Manufacturing process technology	32 nm	32 nm
Maximum core temperature	100 °C	100C
Maximum frequency	3.50 GHz	1.9 GHz
Number of cores	2	2
Number of threads	4	2
Transistor count	624 Million	504 million
Memory
Max memory channels	2	2
Maximum memory bandwidth	21.3 GB/s	21.3 GB/s
Maximum memory size	16 GB	16 GB
Supported memory types	DDR3 1066/1333	DDR3 1066/1333
Graphics
Device ID	0x116
Graphics base frequency	650 MHz	650 MHz
Graphics max dynamic frequency	1.30 GHz	1.00 GHz
Graphics max frequency	1.3 GHz	1 GHz
Intel® Clear Video HD technology
Intel® Flexible Display Interface (Intel® FDI)
Intel® InTru™ 3D technology
Intel® Quick Sync Video
Processor graphics	Intel® HD Graphics 3000	Intel HD Graphics
Graphics interfaces
CRT
DisplayPort
eDP
HDMI
Number of displays supported	2	2
SDVO
Wireless Display (WiDi) support
Compatibility
Low Halogen Options Available
Package Size	37.5mm x 37.5mm (rPGA988B); 31mm x 24mm (BGA1023)	37.5mm x 37.5mm (rPGA988B)
Sockets supported	FCBGA1023, PPGA988	FCPGA988
Thermal Design Power (TDP)	35 Watt	35 Watt
Max number of CPUs in a configuration		1
Peripherals
Max number of PCIe lanes	16	16
PCI Express revision	2.0	2.0
PCIe configurations	1x16, 2x8, 1x8 2x4	1x16, 2x8, 1x8 2x4
Security & Reliability
Anti-Theft technology
Execute Disable Bit (EDB)
Intel® Identity Protection technology
Intel® Trusted Execution technology (TXT)
Advanced Technologies
4G WiMAX Wireless
Enhanced Intel SpeedStep® technology
Flexible Display interface (FDI)
Idle States
Instruction set extensions	Intel® AVX
Intel 64
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Intel® Demand Based Switching
Intel® Fast Memory Access
Intel® Flex Memory Access
Intel® Hyper-Threading technology
Intel® My WiFi technology
Intel® Turbo Boost technology
Intel® vPro™ Platform Eligibility
Thermal Monitoring
Virtualization
AMD Virtualization (AMD-V™)
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)