Intel Core Ultra 7 155U vs Intel Core i7-5775R

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CPU comparison with benchmarks


Intel Core Ultra 7 155U CPU1 vs CPU2 Intel Core i7-5775R
Intel Core Ultra 7 155U Intel Core i7-5775R

CPU comparison

In this CPU comparison, we compare the Intel Core Ultra 7 155U and the Intel Core i7-5775R and use benchmarks to check which processor is faster.

We compare the Intel Core Ultra 7 155U 12 core processor released in Q4/2023 with the Intel Core i7-5775R which has 4 CPU cores and was introduced in Q2/2015.
Intel Core Ultra 7 (10) Family Intel Core i7 (298)
Intel Core Ultra 100U (7) CPU group Intel Core i 5000 (7)
1 Generation 5
Meteor Lake U Architecture Broadwell S
Mobile Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core Ultra 7 155U is a 12 core processor with a clock frequency of 1.70 GHz (4.80 GHz). The processor can compute 14 threads at the same time. The Intel Core i7-5775R clocks with 3.30 GHz (3.80 GHz), has 4 CPU cores and can calculate 8 threads in parallel.

Intel Core Ultra 7 155U Characteristic Intel Core i7-5775R
12 Cores 4
14 Threads 8
hybrid (big.LITTLE) Core architecture normal
Yes Hyperthreading Yes
No Overclocking ? Yes
1.70 GHz (4.80 GHz)
2x Redwood Cove
A-Core 3.30 GHz (3.80 GHz)
1.20 GHz (3.80 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 7 155U Characteristic Intel Core i7-5775R
Intel® AI Boost AI hardware --
Intel AI Boost @ 1.4 GHz (OpenVINO, WindowsML, DirectML, ONNX RT) AI specifications --
-- NPU + CPU + iGPU --

Integrated graphics (iGPU)

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 4 Core Graphics 64 EUs (Meteor Lake) GPU Intel Iris Pro Graphics 6200
0.60 GHz GPU frequency 0.30 GHz
1.95 GHz GPU (Turbo) 1.15 GHz
-- GPU Generation 8
5 nm Technology 14 nm
4 Max. displays 3
64 Compute units 48
512 Shader 384
Yes Hardware Raytracing No
No Frame Generation No
32 GB Max. GPU Memory 32 GB
12.2 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.

Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake) GPU Intel Iris Pro Graphics 6200
Decode / Encode Codec h265 / HEVC (8 bit) No
Decode / Encode Codec h265 / HEVC (10 bit) No
Decode / Encode Codec h264 Decode / Encode
Decode Codec VP9 No
Decode Codec VP8 Decode
Decode / Encode Codec AV1 No
Decode / Encode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode

Memory & PCIe

Up to 96 GB of memory in a maximum of 2 memory channels is supported by the Intel Core Ultra 7 155U, while the Intel Core i7-5775R supports a maximum of 32 GB of memory with a maximum memory bandwidth of 29.9 GB/s enabled.

Intel Core Ultra 7 155U Characteristic Intel Core i7-5775R
LPDDR5X-7500, DDR5-5600 Memory DDR3-1866
96 GB Max. Memory 32 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
120.0 GB/s Max. Bandwidth 29.9 GB/s
No ECC No
12.00 MB L2 Cache --
-- L3 Cache 6.00 MB
4.0 PCIe version 3.0
20 PCIe lanes 16
39.4 GB/s PCIe Bandwidth 15.8 GB/s

Thermal Management

The Intel Core Ultra 7 155U has a TDP of 15 W. The TDP of the Intel Core i7-5775R is 65 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Intel Core Ultra 7 155U Characteristic Intel Core i7-5775R
15 W TDP (PL1 / PBP) 65 W
57 W TDP (PL2) --
28 W TDP up --
12 W TDP down --
110 °C Tjunction max. --

Technical details

The Intel Core Ultra 7 155U has 12.00 MB cache and is manufactured in 7 nm. The cache of Intel Core i7-5775R is at 6.00 MB. The processor is manufactured in 14 nm.

Intel Core Ultra 7 155U Characteristic Intel Core i7-5775R
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, AVX2
BGA 2049 Socket BGA 1364
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 Q2/2015
-- Release price --
show more data show more data


Rate these processors

Here you can rate the Intel Core Ultra 7 155U to help other visitors make their purchasing decisions. The average rating is 4.0 stars (11 ratings). Rate now:
Here you can rate the Intel Core i7-5775R to help other visitors make their purchasing decisions. The average rating is 0 stars (0 ratings). Rate now:


Average performance in benchmarks

⌀ Single core performance in 1 CPU benchmarks
Intel Core Ultra 7 155U (100%)
Intel Core i7-5775R (54%)
⌀ Multi core performance in 1 CPU benchmarks
Intel Core Ultra 7 155U (100%)
Intel Core i7-5775R (45%)

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 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
2354 (100%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.80 GHz
1261 (54%)

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 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 GHz
9716 (100%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.50 GHz
4399 (45%)

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 7 155U Intel Core Ultra 7 155U
Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake) @ 1.95 GHz
1935 (100%)
Intel Core i7-5775R Intel Core i7-5775R
Intel Iris Pro Graphics 6200 @ 1.15 GHz
883 (46%)

Cinebench 2024 (Single-Core)

The Cinebench 2024 benchmark is based on the Redshift rendering engine, which is also used in Maxon's 3D program Cinema 4D. The benchmark runs are each 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
0 (0%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.80 GHz
71 (100%)

Cinebench 2024 (Multi-Core)

The Multi-Core test of the Cinebench 2024 benchmark uses all cpu cores to render using the Redshift rendering engine, which is also used in Maxons Cinema 4D. The benchmark run is 10 minutes long to test whether the processor is limited by its heat generation.
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
0 (0%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.80 GHz
304 (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 Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 GHz
0 (0%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.50 GHz
4688 (100%)

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 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
0 (0%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.80 GHz
1012 (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 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 GHz
0 (0%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.50 GHz
4002 (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 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 GHz
0 (0%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.50 GHz
7780 (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 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
0 (0%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.80 GHz
154 (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 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 GHz
0 (0%)
Intel Core i7-5775R Intel Core i7-5775R
4C 8T @ 3.50 GHz
774 (100%)

Devices using this processor

Intel Core Ultra 7 155U Intel Core i7-5775R
Unknown Apple iMac Retina 4K 21.5

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