Intel Celeron B820 vs Intel Core 2 Duo T6400

Comparative analysis of Intel Celeron B820 and Intel Core 2 Duo T6400 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.

Intel Celeron B820

Intel Core 2 Duo T6400

Differences

Reasons to consider the Intel Celeron B820

CPU is newer: launch date 2 year(s) 6 month(s) later
A newer manufacturing process allows for a more powerful, yet cooler running processor: 32 nm vs 45 nm
Around 10% better performance in PassMark - CPU mark: 802 vs 727
Around 15% better performance in Geekbench 4 - Single Core: 290 vs 253
Around 10% better performance in Geekbench 4 - Multi-Core: 508 vs 462

Specifications (specs)
Launch date	31 July 2011 vs 1 January 2009
Manufacturing process technology	32 nm vs 45 nm
Benchmarks
PassMark - CPU mark	802 vs 727
Geekbench 4 - Single Core	290 vs 253
Geekbench 4 - Multi-Core	508 vs 462

Reasons to consider the Intel Core 2 Duo T6400

Around 18% higher clock speed: 2 GHz vs 1.7 GHz
Around 5% higher maximum core temperature: 105°C vs 100 °C
4x more L2 cache, more data can be stored in the L2 cache for quick access later
Around 6% better performance in PassMark - Single thread mark: 796 vs 749

Specifications (specs)
Maximum frequency	2 GHz vs 1.7 GHz
Maximum core temperature	105°C vs 100 °C
L2 cache	2048 KB vs 512 KB
Benchmarks
PassMark - Single thread mark	796 vs 749

Compare benchmarks

CPU 1: Intel Celeron B820
CPU 2: Intel Core 2 Duo T6400

PassMark - Single thread mark

CPU 1

CPU 2

749

796

PassMark - CPU mark

CPU 1

CPU 2

802

727

Geekbench 4 - Single Core

CPU 1

CPU 2

290

253

Geekbench 4 - Multi-Core

CPU 1

CPU 2

508

462

Name	Intel Celeron B820	Intel Core 2 Duo T6400
PassMark - Single thread mark	749	796
PassMark - CPU mark	802	727
Geekbench 4 - Single Core	290	253
Geekbench 4 - Multi-Core	508	462

Compare specifications (specs)

	Intel Celeron B820	Intel Core 2 Duo T6400
Essentials
Architecture codename	Sandy Bridge	Penryn
Launch date	31 July 2011	1 January 2009
Launch price (MSRP)	$86
Place in performance rating	2921	2925
Price now	$39.29	$14.99
Processor Number	B820	T6400
Series	Legacy Intel® Celeron® Processor	Legacy Intel® Core™ Processors
Status	Launched	Discontinued
Value for money (0-100)	10.70	24.07
Vertical segment	Mobile	Mobile
Performance
64 bit support
Base frequency	1.70 GHz	2.00 GHz
Bus Speed	5 GT/s DMI	800 MHz FSB
Die size	131 mm	107 mm2
L1 cache	128 KB
L2 cache	512 KB	2048 KB
L3 cache	2048 KB
Manufacturing process technology	32 nm	45 nm
Maximum core temperature	100 °C	105°C
Maximum frequency	1.7 GHz	2 GHz
Number of cores	2	2
Number of threads	2	2
Transistor count	504 million	410 million
Front-side bus (FSB)		800 MHz
VID voltage range		1.000V-1.250V
Memory
Max memory channels	2
Maximum memory bandwidth	21.3 GB/s
Maximum memory size	16 GB
Supported memory types	DDR3 1066/1333
Graphics
Graphics base frequency	650 MHz
Graphics max dynamic frequency	1.05 GHz
Graphics max frequency	1.05 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
Graphics interfaces
CRT
DisplayPort
eDP
HDMI
Number of displays supported	2
SDVO
Wireless Display (WiDi) support
Compatibility
Low Halogen Options Available
Max number of CPUs in a configuration	1
Package Size	37.5mmx37.5mm (rPGA988B)	35mm x 35mm
Sockets supported	FCPGA988	PGA478
Thermal Design Power (TDP)	35 Watt	35 Watt
Peripherals
Max number of PCIe lanes	16
PCI Express revision	2.0
PCIe configurations	1x16, 2x8, 1x8 2x4
Security & Reliability
Anti-Theft technology
Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
Advanced Technologies
4G WiMAX Wireless
Enhanced Intel SpeedStep® technology
Flexible Display interface (FDI)
Idle States
Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2
Intel 64
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
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)