Intel Core Ultra 5 135U vs Intel Celeron 3955U

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CPU comparison with benchmarks


Intel Core Ultra 5 135U CPU1 vs CPU2 Intel Celeron 3955U
Intel Core Ultra 5 135U Intel Celeron 3955U

CPU comparison

Intel Core Ultra 5 135U or Intel Celeron 3955U - 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 Core Ultra 5 135U has 12 cores with 14 threads and clocks with a maximum frequency of 4.40 GHz. Up to 96 GB of memory is supported in 2 memory channels. The Intel Core Ultra 5 135U was released in Q4/2023.

The Intel Celeron 3955U has 2 cores with 2 threads and clocks with a maximum frequency of 2.00 GHz. The CPU supports up to 32 GB of memory in 2 memory channels. The Intel Celeron 3955U was released in Q4/2015.
Intel Core Ultra 5 (10) Family Intel Celeron (165)
Intel Core Ultra 100U (7) CPU group Intel Celeron 3000 (10)
1 Generation 7
Meteor Lake U Architecture Kaby Lake U
Mobile Segment Mobile
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core Ultra 5 135U is a 12 core processor with a clock frequency of 1.60 GHz (4.40 GHz). The Intel Celeron 3955U has 2 CPU cores with a clock frequency of 2.00 GHz.
Intel Core Ultra 5 135U Characteristic Intel Celeron 3955U
12 Cores 2
14 Threads 2
hybrid (big.LITTLE) Core architecture normal
Yes Hyperthreading No
No Overclocking ? No
1.60 GHz (4.40 GHz)
2x Redwood Cove		 A-Core 2.00 GHz
1.10 GHz (3.60 GHz)
8x Crestmont		 B-Core --
0.70 GHz (2.10 GHz)
2x Crestmont		 C-Core --

NPU AI performance

The performance values of the processor's AI unit. The isolated NPU performance is specified here, the total AI performance (NPU+CPU+iGPU) can be higher. Processors with support for artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors.
Intel Core Ultra 5 135U Characteristic Intel Celeron 3955U
Intel® AI Boost AI hardware --
Intel AI Boost @ 1.4 GHz (OpenVINO, WindowsML, DirectML, ONNX RT) AI specifications --
-- NPU + CPU + iGPU --

Integrated graphics (iGPU)

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.
Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake) GPU Intel HD Graphics 510
0.60 GHz GPU frequency 0.30 GHz
1.90 GHz GPU (Turbo) 0.90 GHz
-- GPU Generation 9
5 nm Technology 14 nm
4 Max. displays 3
64 Compute units 12
512 Shader 96
Yes Hardware Raytracing No
No Frame Generation No
32 GB Max. GPU Memory 32 GB
12.2 DirectX Version 12.0

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 4 Core Graphics 64 EUs (Meteor Lake) GPU Intel HD Graphics 510
Decode / Encode Codec h265 / HEVC (8 bit) Decode / Encode
Decode / Encode Codec h265 / HEVC (10 bit) Decode
Decode / Encode Codec h264 Decode / Encode
Decode Codec VP9 Decode
Decode Codec VP8 Decode / Encode
Decode / Encode Codec AV1 No
Decode / Encode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode

Memory & PCIe

The Intel Core Ultra 5 135U supports a maximum of 96 GB of memory in 2 memory channels. The Intel Celeron 3955U can connect up to 32 GB of memory in 2 memory channels.
Intel Core Ultra 5 135U Characteristic Intel Celeron 3955U
LPDDR5X-7500, DDR5-5600 Memory LPDDR3-1866, DDR4-2133, DDR3L-1600
96 GB Max. Memory 32 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
120.0 GB/s Max. Bandwidth 34.1 GB/s
No ECC No
12.00 MB L2 Cache --
-- L3 Cache 2.00 MB
4.0 PCIe version 3.0
20 PCIe lanes 12
39.4 GB/s PCIe Bandwidth 11.8 GB/s

Thermal Management

The TDP (Thermal Design Power) of a processor specifies the required cooling solution. The Intel Core Ultra 5 135U has a TDP of 15 W, that of the Intel Celeron 3955U is 15 W.
Intel Core Ultra 5 135U Characteristic Intel Celeron 3955U
15 W TDP (PL1 / PBP) 15 W
57 W TDP (PL2) --
28 W TDP up --
12 W TDP down 10 W
110 °C Tjunction max. 100 °C

Technical details

The Intel Core Ultra 5 135U has a 12.00 MB cache, while the Intel Celeron 3955U cache has a total of 2.00 MB.
Intel Core Ultra 5 135U Characteristic Intel Celeron 3955U
7 nm Technology 14 nm
Chiplet Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2 ISA extensions SSE4.1, SSE4.2
BGA 2049 Socket --
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 11, Linux Operating systems Windows 10, Linux
Q4/2023 Release date Q4/2015
-- Release price --
show more data show more data


Rate these processors

Here you can rate the Intel Core Ultra 5 135U to help other visitors make their purchasing decisions. The average rating is 4.3 stars (3 ratings). Rate now:
Here you can rate the Intel Celeron 3955U to help other visitors make their purchasing decisions. The average rating is 2.0 stars (1 ratings). Rate now:


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 Ultra 5 135U Intel Core Ultra 5 135U
Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake) @ 1.90 GHz
1885 (100%)
Intel Celeron 3955U Intel Celeron 3955U
Intel HD Graphics 510 @ 0.90 GHz
173 (9%)

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 Ultra 5 135U Intel Core Ultra 5 135U
12C 14T @ 4.40 GHz
0 (0%)
Intel Celeron 3955U Intel Celeron 3955U
2C 2T @ 2.00 GHz
514 (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 Ultra 5 135U Intel Core Ultra 5 135U
12C 14T @ 1.60 GHz
0 (0%)
Intel Celeron 3955U Intel Celeron 3955U
2C 2T @ 2.00 GHz
1018 (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 Core Ultra 5 135U Intel Core Ultra 5 135U
12C 14T @ 4.40 GHz
0 (0%)
Intel Celeron 3955U Intel Celeron 3955U
2C 2T @ 2.00 GHz
445 (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 Core Ultra 5 135U Intel Core Ultra 5 135U
12C 14T @ 1.60 GHz
0 (0%)
Intel Celeron 3955U Intel Celeron 3955U
2C 2T @ 2.00 GHz
780 (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 Ultra 5 135U Intel Core Ultra 5 135U
12C 14T @ 1.60 GHz
0 (0%)
Intel Celeron 3955U Intel Celeron 3955U
2C 2T @ 2.00 GHz
1488 (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 Ultra 5 135U Intel Core Ultra 5 135U
12C 14T @ 4.40 GHz
0 (0%)
Intel Celeron 3955U Intel Celeron 3955U
2C 2T @ 2.00 GHz
85 (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 Ultra 5 135U Intel Core Ultra 5 135U
12C 14T @ 1.60 GHz
0 (0%)
Intel Celeron 3955U Intel Celeron 3955U
2C 2T @ 2.00 GHz
159 (100%)

Devices using this processor
Intel Core Ultra 5 135U Intel Celeron 3955U
Unknown Unknown

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