Atom x5-Z8300 vs Core 2 Duo E6400

Place in the ranking	2881	2859
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Laptop
Series	no data	5x Intel Atom
Power efficiency	0.72	no data
Architecture codename	Conroe (2006−2007)	Cherry Trail (2015−2016)
Release date	July 2006 (18 years ago)	2 March 2015 (9 years ago)

Detailed specifications

Core 2 Duo E6400 and Atom x5-Z8300 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)	4 (Quad-Core)
Threads	2	4
Base clock speed	2.13 GHz	1.44 GHz
Boost clock speed	2.13 GHz	1.84 GHz
Bus rate	1066 MHz	no data
L1 cache	64 KB	no data
L2 cache	2 MB	2 MB
L3 cache	0 KB	0 KB
Chip lithography	65 nm	14 nm
Die size	143 mm²	no data
Maximum core temperature	61 °C	90 °C
Number of transistors	291 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	0.85V-1.5V	no data

Compatibility

Information on Core 2 Duo E6400 and Atom x5-Z8300 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	LGA775,PLGA775	UTFCBGA592
Power consumption (TDP)	65 Watt	no data

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo E6400 and Atom x5-Z8300. You'll probably need this information if you require some particular technology.

AES-NI	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	-	no data
FSB parity	-	no data

Security technologies

Core 2 Duo E6400 and Atom x5-Z8300 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data
Secure Boot	no data	+
Identity Protection	-	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo E6400 and Atom x5-Z8300 are enumerated here.

VT-x

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E6400 and Atom x5-Z8300. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	DDR3
Maximum memory size	no data	2 GB
Max memory channels	no data	1
Maximum memory bandwidth	no data	12.8 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	no data	Intel HD Graphics
Max video memory	no data	2 GB
Graphics max frequency	no data	500 MHz
Execution Units	no data	12

Graphics interfaces

Available interfaces and connections of Core 2 Duo E6400 and Atom x5-Z8300 integrated GPUs.

Number of displays supported

no data

Graphics image quality

Maximum display resolutions supported by Core 2 Duo E6400 and Atom x5-Z8300 integrated GPUs, including resolutions over different interfaces.

Max resolution over HDMI 1.4

no data

1920x1080

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo E6400 and Atom x5-Z8300.

PCIe version	no data	2.0
PCI Express lanes	no data	1
USB revision	no data	3.0

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 E6400 0.51

Atom x5-Z8300 0.53
+3.9%

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 E6400 780

Atom x5-Z8300 814
+4.4%

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 E6400 233
+77.9%

Atom x5-Z8300 131

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 E6400 374
+5.6%

Atom x5-Z8300 354

Gaming performance

Pros & cons summary

Performance score	0.51	0.53
Physical cores	2	4
Threads	2	4
Chip lithography	65 nm	14 nm

Atom x5-Z8300 has a 3.9% higher aggregate performance score, 100% more physical cores and 100% more threads, and a 364.3% more advanced lithography process.

Given the minimal performance differences, no clear winner can be declared between Core 2 Duo E6400 and Atom x5-Z8300.

Note that Core 2 Duo E6400 is a desktop processor while Atom x5-Z8300 is a notebook one.

Should you still have questions on choice between Core 2 Duo E6400 and Atom x5-Z8300, ask them in Comments section, and we shall answer.