Intel Core2 Duo E8400 vs Intel Core i9-12900KS

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CPU comparison with benchmarks


Intel Core2 Duo E8400 CPU1 vs CPU2 Intel Core i9-12900KS
Intel Core2 Duo E8400 Intel Core i9-12900KS

CPU comparison

Intel Core2 Duo E8400 or Intel Core i9-12900KS - which processor is faster? In this comparison we look at the differences and analyze which of these two CPUs is better. We compare the technical data and benchmark results.

The Intel Core2 Duo E8400 has 2 cores with 2 threads and clocks with a maximum frequency of 3.00 GHz. Up to 16 GB of memory is supported in 2 memory channels. The Intel Core2 Duo E8400 was released in Q1/2008.

The Intel Core i9-12900KS has 16 cores with 24 threads and clocks with a maximum frequency of 5.50 GHz. The CPU supports up to 128 GB of memory in 2 memory channels. The Intel Core i9-12900KS was released in Q2/2022.
Intel Core2 Duo (29) Family Intel Core i9 (78)
Intel Core 2 Duo E7000/E8000 (14) CPU group Intel Core i 12000 (34)
2 Generation 12
Wolfdale (Penryn) Architecture Alder Lake S
Desktop / Server Segment Desktop / Server
-- Predecessor --
-- Successor Intel Core i9-13900KS

CPU Cores and Base Frequency

The Intel Core2 Duo E8400 is a 2 core processor with a clock frequency of 3.00 GHz. The Intel Core i9-12900KS has 16 CPU cores with a clock frequency of 3.40 GHz (5.50 GHz).

Intel Core2 Duo E8400 Characteristic Intel Core i9-12900KS
2 Cores 16
2 Threads 24
normal Core architecture hybrid (big.LITTLE)
No Hyperthreading Yes
Yes Overclocking ? Yes
3.00 GHz A-Core 3.40 GHz (5.50 GHz)
8x Golden Cove
-- B-Core 2.50 GHz (4.00 GHz)
8x Gracemont

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 Core2 Duo E8400 Characteristic Intel Core i9-12900KS
-- AI hardware --
-- AI specifications --

Internal Graphics

The integrated graphics unit of a processor is not only responsible for the pure image output on the system, but can also significantly increase the efficiency of the system with the support of modern video codecs.

no iGPU GPU Intel UHD Graphics 770
GPU frequency 0.30 GHz
-- GPU (Turbo) 1.55 GHz
-- GPU Generation 11
Technology 10 nm
Max. displays 3
-- Compute units 32
-- Shader 256
No Hardware Raytracing No
No Frame Generation No
-- Max. GPU Memory 64 GB
-- DirectX Version 12

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 Intel UHD Graphics 770
No Codec h265 / HEVC (8 bit) Decode / Encode
No Codec h265 / HEVC (10 bit) Decode / Encode
No Codec h264 Decode / Encode
No Codec VP9 Decode / Encode
No Codec VP8 Decode / Encode
No Codec AV1 Decode
No Codec AVC Decode / Encode
No Codec VC-1 Decode
No Codec JPEG Decode / Encode

Memory & PCIe

The Intel Core2 Duo E8400 supports a maximum of 16 GB of memory in 2 memory channels. The Intel Core i9-12900KS can connect up to 128 GB of memory in 2 memory channels.

Intel Core2 Duo E8400 Characteristic Intel Core i9-12900KS
DDR3-1333, DDR2-1066 Memory DDR5-4800, DDR4-3200
16 GB Max. Memory 128 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
21.3 GB/s Max. Bandwidth 76.8 GB/s
No ECC Yes
6.00 MB L2 Cache 14.00 MB
-- L3 Cache 30.00 MB
-- PCIe version 5.0
-- PCIe lanes 20
-- PCIe Bandwidth 78.8 GB/s

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core2 Duo E8400 has a TDP of 65 W, that of the Intel Core i9-12900KS is 150 W.

Intel Core2 Duo E8400 Characteristic Intel Core i9-12900KS
65 W TDP (PL1 / PBP) 150 W
-- TDP (PL2) 241 W
-- TDP up --
-- TDP down --
-- Tjunction max. 90 °C

Technical details

The Intel Core2 Duo E8400 has a 6.00 MB cache, while the Intel Core i9-12900KS cache has a total of 44.00 MB.

Intel Core2 Duo E8400 Characteristic Intel Core i9-12900KS
45 nm Technology 10 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
MMX, SSE, SSE2, SSE3, SSE 4.1 ISA extensions SSE4.1, SSE4.2, AVX2, AVX2+
LGA 775 Socket LGA 1700
VT-x Virtualization VT-x, VT-x EPT, VT-d
No AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Windows 11, Linux
Q1/2008 Release date Q2/2022
-- Release price 749 $
show more data show more data


Rate these processors

Here you can rate the Intel Core2 Duo E8400 to help other visitors make their purchasing decisions. The average rating is 5.0 stars (3 ratings). Rate now:
Here you can rate the Intel Core i9-12900KS to help other visitors make their purchasing decisions. The average rating is 5.0 stars (6 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
⌀ Multi core performance in 2 CPU benchmarks

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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
473 (23%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.50 GHz
2080 (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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
841 (4%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.20 GHz
19010 (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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
1129 (3%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.20 GHz
44541 (100%)

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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.50 GHz
2082 (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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.20 GHz
27796 (100%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.50 GHz
2831 (100%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.20 GHz
16455 (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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.50 GHz
795 (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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.20 GHz
10744 (100%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
Intel Core2 Duo E8400 Intel Core2 Duo E8400
@ 0.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
Intel UHD Graphics 770 @ 1.55 GHz
794 (100%)

Blender 3.1 Benchmark

In the Blender Benchmark 3.1, the scenes "monster", "junkshop" and "classroom" are rendered and the time required by the system is measured. In our benchmark we test the CPU and not the graphics card. Blender 3.1 was presented as a standalone version in March 2022.
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.20 GHz
399 (100%)

Blender 2.81 (bmw27)

Blender is a free 3D graphics software for rendering (creating) 3D bodies, which can also be textured and animated in the software. The Blender benchmark creates predefined scenes and measures the time (s) required for the entire scene. The shorter the time required, the better. We selected bmw27 as the benchmark scene.
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.20 GHz
87 (100%)

CPU-Z Benchmark 17 (Single-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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
252 (100%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.20 GHz
0 (0%)

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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
465 (100%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 3.40 GHz
0 (0%)

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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.50 GHz
294 (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 Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
16C 24T @ 5.20 GHz
4140 (100%)

CPU performance per watt (efficiency)

Efficiency of the processor under full load in the Cinebench R23 (multi-core) benchmark. The benchmark result is divided by the average energy required (CPU package power in watts). The higher the value, the more efficient the CPU is under full load.
Intel Core2 Duo E8400 Intel Core2 Duo E8400
3.00 GHz
0 (0%)
Intel Core i9-12900KS Intel Core i9-12900KS
27,796 CB R23 MC @ 241 W
115 (100%)

Devices using this processor

Intel Core2 Duo E8400 Intel Core i9-12900KS
Unknown Unknown

News and articles for the Intel Core2 Duo E8400 and the Intel Core i9-12900KS


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