Intel Core i3-1115GRE vs Intel Core Ultra 7 155U

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CPU comparison with benchmarks


Intel Core i3-1115GRE CPU1 vs CPU2 Intel Core Ultra 7 155U
Intel Core i3-1115GRE Intel Core Ultra 7 155U

CPU comparison

Intel Core i3-1115GRE or Intel Core Ultra 7 155U - 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 i3-1115GRE has 2 cores with 4 threads and clocks with a maximum frequency of 3.90 GHz. Up to 64 GB of memory is supported in 2 memory channels. The Intel Core i3-1115GRE was released in Q3/2020.

The Intel Core Ultra 7 155U has 12 cores with 14 threads and clocks with a maximum frequency of 4.80 GHz. The CPU supports up to 96 GB of memory in 2 memory channels. The Intel Core Ultra 7 155U was released in Q4/2023.
Intel Core i3 (205) Family Intel Core Ultra 7 (9)
Intel Core i 11000H (17) CPU group Intel Core Ultra 100U (7)
11 Generation 1
Tiger Lake H Architecture Meteor Lake U
Mobile Segment Mobile
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core i3-1115GRE has 2 CPU cores and can calculate 4 threads in parallel. The clock frequency of the Intel Core i3-1115GRE is 2.20 GHz (3.90 GHz) while the Intel Core Ultra 7 155U has 12 CPU cores and 14 threads can calculate simultaneously. The clock frequency of the Intel Core Ultra 7 155U is at 1.70 GHz (4.80 GHz).
Intel Core i3-1115GRE Characteristic Intel Core Ultra 7 155U
2 Cores 12
4 Threads 14
normal Core architecture hybrid (big.LITTLE)
Yes Hyperthreading Yes
No Overclocking ? No
2.20 GHz (3.90 GHz) A-Core 1.70 GHz (4.80 GHz)
2x Redwood Cove
-- B-Core 1.20 GHz (3.80 GHz)
8x Crestmont
-- C-Core 0.70 GHz (2.10 GHz)
2x Crestmont

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 i3-1115GRE Characteristic Intel Core Ultra 7 155U
-- AI hardware Intel AI engine
-- AI specifications Intel AI Boost @ 1.4 GHz (OpenVINO, WindowsML, DirectML, ONNX RT)

Internal Graphics

The Intel Core i3-1115GRE or Intel Core Ultra 7 155U has integrated graphics, called iGPU for short. The iGPU uses the system's main memory as graphics memory and sits on the processor's die.
Intel UHD Graphics (Tiger Lake G4) GPU Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake)
0.30 GHz GPU frequency 0.60 GHz
1.25 GHz GPU (Turbo) 1.95 GHz
11 GPU Generation --
10 nm Technology 5 nm
4 Max. displays 4
48 Compute units 64
384 Shader 512
No Hardware Raytracing Yes
No Frame Generation No
32 GB Max. GPU Memory 32 GB
12 DirectX Version 12.2

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 UHD Graphics (Tiger Lake G4) GPU Intel Iris Xe 4 Core Graphics 64 EUs (Meteor Lake)
Decode / Encode Codec h265 / HEVC (8 bit) Decode / Encode
Decode / Encode Codec h265 / HEVC (10 bit) Decode / Encode
Decode / Encode Codec h264 Decode / Encode
Decode Codec VP9 Decode
Decode Codec VP8 Decode
Decode Codec AV1 Decode / Encode
Decode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode / Encode Codec JPEG Decode / Encode

Memory & PCIe

The Intel Core i3-1115GRE can use up to 64 GB of memory in 2 memory channels. The maximum memory bandwidth is 59.6 GB/s. The Intel Core Ultra 7 155U supports up to 96 GB of memory in 2 memory channels and achieves a memory bandwidth of up to 120.0 GB/s.
Intel Core i3-1115GRE Characteristic Intel Core Ultra 7 155U
LPDDR4X-3733, DDR4-3200 Memory LPDDR5X-7500, DDR5-5600
64 GB Max. Memory 96 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
59.6 GB/s Max. Bandwidth 120.0 GB/s
Yes ECC No
-- L2 Cache 12.00 MB
6.00 MB L3 Cache --
4.0 PCIe version 4.0
4 PCIe lanes 20
7.9 GB/s PCIe Bandwidth 39.4 GB/s

Thermal Management

The thermal design power (TDP for short) of the Intel Core i3-1115GRE is 15 W, while the Intel Core Ultra 7 155U has a TDP of 15 W. The TDP specifies the necessary cooling solution that is required to cool the processor sufficiently.
Intel Core i3-1115GRE Characteristic Intel Core Ultra 7 155U
15 W TDP (PL1 / PBP) 15 W
-- TDP (PL2) 57 W
28 W TDP up 28 W
12 W TDP down 12 W
100 °C Tjunction max. 110 °C

Technical details

The Intel Core i3-1115GRE is manufactured in 10 nm and has 6.00 MB cache. The Intel Core Ultra 7 155U is manufactured in 7 nm and has a 12.00 MB cache.
Intel Core i3-1115GRE Characteristic Intel Core Ultra 7 155U
10 nm Technology 7 nm
Monolithic Chip design Chiplet
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX2, AVX-512 ISA extensions SSE4.1, SSE4.2, AVX2
BGA 1449 Socket BGA 2049
VT-x, VT-x EPT, VT-d Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Windows 11, Linux Operating systems Windows 11, Linux
Q3/2020 Release date Q4/2023
372 $ Release price --
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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 i3-1115GRE Intel Core i3-1115GRE
Intel UHD Graphics (Tiger Lake G4) @ 1.25 GHz
960 (50%)
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%)

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 i3-1115GRE Intel Core i3-1115GRE
2C 4T @ 3.90 GHz
1175 (100%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
0 (0%)

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 i3-1115GRE Intel Core i3-1115GRE
2C 4T @ 3.90 GHz
2233 (100%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 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 i3-1115GRE Intel Core i3-1115GRE
2C 4T @ 3.90 GHz
0 (0%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 4.80 GHz
2354 (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 i3-1115GRE Intel Core i3-1115GRE
2C 4T @ 3.90 GHz
0 (0%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 GHz
9716 (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 i3-1115GRE Intel Core i3-1115GRE
2C 4T @ 3.90 GHz
4421 (100%)
Intel Core Ultra 7 155U Intel Core Ultra 7 155U
12C 14T @ 1.70 GHz
0 (0%)

Devices using this processor
Intel Core i3-1115GRE Intel Core Ultra 7 155U
Unknown Unknown

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