Core 2 Duo E6400 vs Athlon II X4 651

VS

Aggregate performance score

Athlon II X4 651
2011
4 cores / 4 threads, 100 Watt
2.26
+361%
Core 2 Duo E6400
2006
2 cores / 2 threads, 65 Watt
0.49

Athlon II X4 651 outperforms Core 2 Duo E6400 by a whopping 361% based on our aggregate benchmark results.

Primary details

Comparing Athlon II X4 651 and Core 2 Duo E6400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking18302902
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorDesktop processor
Power efficiency2.140.71
Architecture codenameLlano (2011−2012)Conroe (2006−2007)
Release date14 November 2011 (13 years ago)July 2006 (18 years ago)

Detailed specifications

Athlon II X4 651 and Core 2 Duo E6400 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 cores4 (Quad-Core)2 (Dual-core)
Threads42
Base clock speed3 GHz2.13 GHz
Boost clock speed3 GHz2.13 GHz
Bus rateno data1066 MHz
L1 cache128 KB (per core)64 KB
L2 cache1 MB (per core)2 MB
L3 cache0 KB0 KB
Chip lithography32 nm65 nm
Die size228 mm2143 mm2
Maximum core temperatureno data61 °C
Number of transistors1,178 million291 million
64 bit support++
Windows 11 compatibility--
VID voltage rangeno data0.85V-1.5V

Compatibility

Information on Athlon II X4 651 and Core 2 Duo E6400 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 configuration11
SocketFM1LGA775,PLGA775
Power consumption (TDP)100 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Athlon II X4 651 and Core 2 Duo E6400. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)no data+
Turbo Boost Technologyno data-
Hyper-Threading Technologyno data-
Idle Statesno data+
Thermal Monitoring-+
Demand Based Switchingno data-
FSB parityno data-

Security technologies

Athlon II X4 651 and Core 2 Duo E6400 technologies aimed at improving security, for example, by protecting against hacks.

TXTno data-
EDBno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Athlon II X4 651 and Core 2 Duo E6400 are enumerated here.

AMD-V+-
VT-xno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 651 and Core 2 Duo E6400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR1, DDR2, DDR3

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.

Athlon II X4 651 2.26
+361%
Core 2 Duo E6400 0.49

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.

Athlon II X4 651 3584
+359%
Core 2 Duo E6400 780

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.

Athlon II X4 651 333
+42.9%
Core 2 Duo E6400 233

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.

Athlon II X4 651 1108
+196%
Core 2 Duo E6400 374

Gaming performance

Pros & cons summary


Performance score 2.26 0.49
Physical cores 4 2
Threads 4 2
Chip lithography 32 nm 65 nm
Power consumption (TDP) 100 Watt 65 Watt

Athlon II X4 651 has a 361.2% higher aggregate performance score, 100% more physical cores and 100% more threads, and a 103.1% more advanced lithography process.

Core 2 Duo E6400, on the other hand, has 53.8% lower power consumption.

The Athlon II X4 651 is our recommended choice as it beats the Core 2 Duo E6400 in performance tests.


Should you still have questions on choice between Athlon II X4 651 and Core 2 Duo E6400, ask them in Comments section, and we shall answer.

Vote for your favorite

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AMD Athlon II X4 651
Athlon II X4 651
Intel Core 2 Duo E6400
Core 2 Duo E6400

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Community ratings

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Questions & comments

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