Atom D2550 vs Core 2 Duo E8400

Place in the ranking	2671	3139
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Laptop
Series	no data	Intel Atom
Power efficiency	1.06	2.46
Architecture codename	Wolfdale (2008−2010)	Cedarview (2011−2012)
Release date	1 January 2008 (16 years ago)	1 November 2011 (13 years ago)

Detailed specifications

Core 2 Duo E8400 and Atom D2550 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	4
Base clock speed	3 GHz	1.86 GHz
Boost clock speed	3 GHz	1.87 GHz
Bus rate	1333 MHz	no data
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	6 MB (shared)	512K (per core)
L3 cache	0 KB	0 KB
Chip lithography	45 nm	32 nm
Die size	104 mm²	66 mm²
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	72 °C	no data
Number of transistors	410 million	176 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	0.85V-1.3625V	no data

Compatibility

Information on Core 2 Duo E8400 and Atom D2550 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
Socket	LGA775	FCBGA559
Power consumption (TDP)	65 Watt	10 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo E8400 and Atom D2550. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE2, Intel® SSE3, Intel® SSSE3
Enhanced SpeedStep (EIST)	+	-
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	+
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	-	no data
PAE	no data	36 Bit
FSB parity	-	no data

Security technologies

Core 2 Duo E8400 and Atom D2550 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo E8400 and Atom D2550 are enumerated here.

VT-d	+	-
VT-x	+	-
VT-i	no data	-

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E8400 and Atom D2550. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	DDR3
Maximum memory size	no data	4 GB
Max memory channels	no data	1
Maximum memory bandwidth	no data	6.4 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

Intel Graphics Media Accelerator (GMA) 3650 (640 MHz)

Graphics interfaces

Available interfaces and connections of Core 2 Duo E8400 and Atom D2550 integrated GPUs.

Number of displays supported

no data

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo E8400 and Atom D2550.

PCIe version	2.0	no data
PCI Express lanes	no data	4

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.

Core 2 Duo E8400 0.73
+181%

Atom D2550 0.26

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.

Core 2 Duo E8400 1165
+185%

Atom D2550 409

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Core 2 Duo E8400 370
+270%

Atom D2550 100

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Core 2 Duo E8400 604
+110%

Atom D2550 287

Gaming performance

Pros & cons summary

Performance score	0.73	0.26
Recency	1 January 2008	1 November 2011
Threads	2	4
Chip lithography	45 nm	32 nm
Power consumption (TDP)	65 Watt	10 Watt

Core 2 Duo E8400 has a 180.8% higher aggregate performance score.

Atom D2550, on the other hand, has an age advantage of 3 years, 100% more threads, a 40.6% more advanced lithography process, and 550% lower power consumption.

The Core 2 Duo E8400 is our recommended choice as it beats the Atom D2550 in performance tests.

Note that Core 2 Duo E8400 is a desktop processor while Atom D2550 is a notebook one.

Should you still have questions on choice between Core 2 Duo E8400 and Atom D2550, ask them in Comments section, and we shall answer.