Intel Core i5-1335U vs Intel Core2 Duo E8400

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CPU comparison with benchmarks


Intel Core i5-1335U CPU1 vs CPU2 Intel Core2 Duo E8400
Intel Core i5-1335U Intel Core2 Duo E8400

CPU comparison

In this CPU comparison, we compare the Intel Core i5-1335U and the Intel Core2 Duo E8400 and use benchmarks to check which processor is faster.

We compare the Intel Core i5-1335U 10 core processor released in Q1/2023 with the Intel Core2 Duo E8400 which has 2 CPU cores and was introduced in Q1/2008.
Intel Core i5 (331) Family Intel Core2 Duo (29)
Intel Core i 1300P/1300U (29) CPU group Intel Core 2 Duo E7000/E8000 (14)
13 Generation 2
Raptor Lake U Architecture Wolfdale (Penryn)
Mobile Segment Desktop / Server
Intel Core i5-1235U Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core i5-1335U is a 10 core processor with a clock frequency of 1.30 GHz (4.60 GHz). The processor can compute 12 threads at the same time. The Intel Core2 Duo E8400 clocks with 3.00 GHz, has 2 CPU cores and can calculate 2 threads in parallel.

Intel Core i5-1335U Characteristic Intel Core2 Duo E8400
10 Cores 2
12 Threads 2
hybrid (big.LITTLE) Core architecture normal
Yes Hyperthreading No
No Overclocking ? Yes
1.30 GHz (4.60 GHz)
2x Raptor Cove
A-Core 3.00 GHz
0.90 GHz (3.40 GHz)
8x Gracemont
B-Core --

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 i5-1335U Characteristic Intel Core2 Duo E8400
-- 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.

Intel Iris Xe Graphics 80 (Alder Lake) GPU no iGPU
0.35 GHz GPU frequency --
1.25 GHz GPU (Turbo) --
13 GPU Generation --
10 nm Technology
4 Max. displays
80 Compute units --
640 Shader --
No Hardware Raytracing No
No Frame Generation No
32 GB Max. GPU Memory --
12.1 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.

Intel Iris Xe Graphics 80 (Alder Lake) GPU no iGPU
Decode / Encode Codec h265 / HEVC (8 bit) No
Decode / Encode Codec h265 / HEVC (10 bit) No
Decode / Encode Codec h264 No
Decode / Encode Codec VP9 No
Decode Codec VP8 No
Decode Codec AV1 No
Decode / Encode Codec AVC No
Decode Codec VC-1 No
Decode / Encode Codec JPEG No

Memory & PCIe

Up to 96 GB of memory in a maximum of 2 memory channels is supported by the Intel Core i5-1335U, while the Intel Core2 Duo E8400 supports a maximum of 16 GB of memory with a maximum memory bandwidth of 21.3 GB/s enabled.

Intel Core i5-1335U Characteristic Intel Core2 Duo E8400
LPDDR5-6400, LPDDR4X-4266, DDR5-5200, DDR4-3200 Memory DDR3-1333, DDR2-1066
96 GB Max. Memory 16 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
102.4 GB/s Max. Bandwidth 21.3 GB/s
No ECC No
-- L2 Cache 6.00 MB
12.00 MB L3 Cache --
4.0 PCIe version --
20 PCIe lanes --
39.4 GB/s PCIe Bandwidth --

Thermal Management

The Intel Core i5-1335U has a TDP of 15 W. The TDP of the Intel Core2 Duo E8400 is 65 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Intel Core i5-1335U Characteristic Intel Core2 Duo E8400
15 W TDP (PL1 / PBP) 65 W
55 W TDP (PL2) --
-- TDP up --
12 W TDP down --
100 °C Tjunction max. --

Technical details

The Intel Core i5-1335U has 12.00 MB cache and is manufactured in 10 nm. The cache of Intel Core2 Duo E8400 is at 6.00 MB. The processor is manufactured in 45 nm.

Intel Core i5-1335U Characteristic Intel Core2 Duo E8400
10 nm Technology 45 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2 ISA extensions MMX, SSE, SSE2, SSE3, SSE 4.1
BGA 1744 Socket LGA 775
VT-x, VT-x EPT, VT-d Virtualization VT-x
Yes AES-NI No
Windows 10, Windows 11, Linux Operating systems Windows 10, Linux
Q1/2023 Release date Q1/2008
-- Release price --
show more data show more data


Rate these processors

Here you can rate the Intel Core i5-1335U to help other visitors make their purchasing decisions. The average rating is 4.2 stars (27 ratings). Rate now:
Here you can rate the Intel Core2 Duo E8400 to help other visitors make their purchasing decisions. The average rating is 4.6 stars (11 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
Intel Core i5-1335U (100%)
Intel Core2 Duo E8400 (29%)
⌀ Multi core performance in 2 CPU benchmarks
Intel Core i5-1335U (100%)
Intel Core2 Duo E8400 (10%)

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 i5-1335U Intel Core i5-1335U
10C 12T @ 4.60 GHz
1628 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
473 (29%)

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 i5-1335U Intel Core i5-1335U
10C 12T @ 1.30 GHz
7240 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
841 (12%)

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 i5-1335U Intel Core i5-1335U
10C 12T @ 1.30 GHz
17062 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
1129 (7%)

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 i5-1335U Intel Core i5-1335U
10C 12T @ 4.60 GHz
1705 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)

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 i5-1335U Intel Core i5-1335U
10C 12T @ 1.30 GHz
8970 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)

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 Core i5-1335U Intel Core i5-1335U
10C 12T @ 4.60 GHz
2183 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)

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 Core i5-1335U Intel Core i5-1335U
10C 12T @ 1.30 GHz
8102 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)

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 i5-1335U Intel Core i5-1335U
10C 12T @ 4.60 GHz
652 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)

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 i5-1335U Intel Core i5-1335U
10C 12T @ 1.30 GHz
3468 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
0 (0%)

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 Core i5-1335U Intel Core i5-1335U
Intel Iris Xe Graphics 80 (Alder Lake) @ 1.25 GHz
1549 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
@ 0.00 GHz
0 (0%)

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 Core i5-1335U Intel Core i5-1335U
10C 12T @ 1.30 GHz
0 (0%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
252 (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 i5-1335U Intel Core i5-1335U
10C 12T @ 1.30 GHz
0 (0%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
2C 2T @ 3.00 GHz
465 (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 Core i5-1335U Intel Core i5-1335U
8,970 CB R23 MC @ 45 W
199 (100%)
Intel Core2 Duo E8400 Intel Core2 Duo E8400
3.00 GHz
0 (0%)

Devices using this processor

Intel Core i5-1335U Intel Core2 Duo E8400
Unknown Unknown

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