Intel Core 2 Quad Q8400 vs AMD Athlon II X4 640

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CPU comparison with benchmarks


Intel Core 2 Quad Q8400 CPU1 vs CPU2 AMD Athlon II X4 640
Intel Core 2 Quad Q8400 AMD Athlon II X4 640

CPU comparison

In this CPU comparison, we compare the Intel Core 2 Quad Q8400 and the AMD Athlon II X4 640 and use benchmarks to check which processor is faster.

We compare the Intel Core 2 Quad Q8400 4 core processor released in Q2/2009 with the AMD Athlon II X4 640 which has 4 CPU cores and was introduced in Q2/2010.
Intel Core2 Quad (19) Family AMD Athlon II (52)
Intel Core 2 Quad Q8000/Q9000 (16) CPU group AMD Athlon II X4 (Propus) (10)
2 Generation 1
Yorkfield (Penryn) Architecture Propus
Desktop / Server Segment Desktop / Server
-- Predecessor --
-- Successor AMD Athlon II X4 740

CPU Cores and Base Frequency

The Intel Core 2 Quad Q8400 is a 4 core processor with a clock frequency of 2.66 GHz. The processor can compute 4 threads at the same time. The AMD Athlon II X4 640 clocks with 3.00 GHz, has 4 CPU cores and can calculate 4 threads in parallel.

Intel Core 2 Quad Q8400 Characteristic AMD Athlon II X4 640
4 Cores 4
4 Threads 4
normal Core architecture normal
No Hyperthreading No
No Overclocking ? No
2.66 GHz Frequency 3.00 GHz
-- Turbo Frequency (1 Core) --
-- Turbo Frequency (All Cores) --

Artificial Intelligence and Machine Learning

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.

Intel Core 2 Quad Q8400 Characteristic AMD Athlon II X4 640
-- AI hardware --
-- AI specifications --

Internal Graphics

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

no iGPU GPU no iGPU
GPU frequency --
-- GPU (Turbo) --
-- GPU Generation --
Technology
Max. displays
-- Compute units --
-- Shader --
No Hardware Raytracing No
No Frame Generation No
-- Max. GPU Memory --
-- DirectX Version --

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.

no iGPU GPU no iGPU
No Codec h265 / HEVC (8 bit) No
No Codec h265 / HEVC (10 bit) No
No Codec h264 No
No Codec VP9 No
No Codec VP8 No
No Codec AV1 No
No Codec AVC No
No Codec VC-1 No
No Codec JPEG No

Memory & PCIe

Up to 16 GB of memory in a maximum of 2 memory channels is supported by the Intel Core 2 Quad Q8400, while the AMD Athlon II X4 640 supports a maximum of 16 GB of memory with a maximum memory bandwidth of 21.3 GB/s enabled.

Intel Core 2 Quad Q8400 Characteristic AMD Athlon II X4 640
DDR3-1066, DDR2-800 Memory DDR3-1333
16 GB Max. Memory 16 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
17.1 GB/s Max. Bandwidth 21.3 GB/s
No ECC No
4.00 MB L2 Cache 2.00 MB
-- L3 Cache --
-- PCIe version 2.0
-- PCIe lanes --
-- PCIe Bandwidth --

Thermal Management

The Intel Core 2 Quad Q8400 has a TDP of 95 W. The TDP of the AMD Athlon II X4 640 is 95 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Intel Core 2 Quad Q8400 Characteristic AMD Athlon II X4 640
95 W TDP (PL1 / PBP) 95 W
-- TDP (PL2) --
-- TDP up --
-- TDP down --
-- Tjunction max. --

Technical details

The Intel Core 2 Quad Q8400 has 4.00 MB cache and is manufactured in 45 nm. The cache of AMD Athlon II X4 640 is at 2.00 MB. The processor is manufactured in 45 nm.

Intel Core 2 Quad Q8400 Characteristic AMD Athlon II X4 640
45 nm Technology 45 nm
Monolithic Chip design Unknown
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
MMX, SSE2, SSE3, SSE4.1 ISA extensions MMX, 3DNow!, SSE3, SSE4a
LGA 775 Socket AM3
VT-x, VT-d Virtualization AMD-V
No AES-NI No
Windows 10, Linux Operating systems Windows 10, Linux
Q2/2009 Release date Q2/2010
-- Release price --
show more data show more data


Rate these processors

Here you can rate the Intel Core 2 Quad Q8400 to help other visitors make their purchasing decisions. The average rating is 4.0 stars (1 ratings). Rate now:
Here you can rate the AMD Athlon II X4 640 to help other visitors make their purchasing decisions. The average rating is 3.6 stars (5 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
Intel Core 2 Quad Q8400 (96%)
AMD Athlon II X4 640 (100%)
⌀ Multi core performance in 3 CPU benchmarks
Intel Core 2 Quad Q8400 (94%)
AMD Athlon II X4 640 (87%)

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
369 (96%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
386 (100%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
1155 (87%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
1332 (100%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
2029 (94%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
2161 (100%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
894 (100%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
557 (62%)

Cinebench R23 (Single-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
0 (0%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
389 (100%)

Cinebench R23 (Multi-Core)

Cinebench R23 is the successor of Cinebench R20 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
0 (0%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
1471 (100%)

Cinebench R20 (Single-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
0 (0%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
152 (100%)

Cinebench R20 (Multi-Core)

Cinebench R20 is the successor of Cinebench R15 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
0 (0%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
582 (100%)

Cinebench R15 (Single-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
0 (0%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
71 (100%)

Cinebench R15 (Multi-Core)

Cinebench R15 is the successor of Cinebench 11.5 and is also based on the Cinema 4 Suite. Cinema 4 is a worldwide used software to create 3D forms. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core 2 Quad Q8400 Intel Core 2 Quad Q8400
4C 4T @ 2.66 GHz
0 (0%)
AMD Athlon II X4 640 AMD Athlon II X4 640
4C 4T @ 3.00 GHz
274 (100%)

Devices using this processor

Intel Core 2 Quad Q8400 AMD Athlon II X4 640
Unknown Unknown

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