Intel Core i7-1255U Intel Processor U300
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Intel Core i7-1255U vs Intel Processor U300

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The Intel Core i7-1255U (Alder Lake U) and the Intel Processor U300 (Raptor Lake U) are both 10 nm mobile processors from Intel, designed for energy-efficient notebooks.

The Intel Core i7-1255U targets more demanding users, while the Intel Processor U300 is intended for basic tasks and budget-conscious systems. The Intel Core i7-1255U features 10 cores (2 Performance-cores, 8 Efficient-cores) and 12 threads, as well as 7 MB Level 2 Cache and 12 MB Level 3 Cache.

The Intel Processor U300 offers 5 cores (1 Performance-core, 4 Efficient-cores) and 6 threads, with 10 MB Level 3 Cache. Both support a maximum memory bandwidth of 83 GB/s. In terms of performance, the Intel Core i7-1255U shows significantly higher multi-core performance, ideal for demanding applications and multitasking.

Single-core performance is comparable for both. For gaming scenarios, the Intel Core i7-1255U with its Intel Iris Xe Graphics 96 is superior to the Intel Processor U300 with Intel UHD Graphics 13th Gen (48 EU), enabling the playing of lighter titles. Both CPUs are designed for energy efficiency.

The Intel Core i7-1255U is priced higher as a more powerful option and is recommended for users who require higher performance for productivity, light creative tasks, and casual gaming. The Intel Processor U300 is a more cost-effective choice for basic computing tasks such as web browsing and media consumption, where cost and energy efficiency are priorities.

Intel Core i7-1255U

  • Alder Lake U Architecture
  • 10 Cores (2 Performance-cores, 8 Efficient-cores), 12 Threads
  • Superior Multi-Core Performance
  • Intel Iris Xe Graphics 96

Intel Processor U300

  • Raptor Lake U Architecture
  • 5 Cores (1 Performance-core, 4 Efficient-cores), 6 Threads
  • Cost-effective and energy-efficient
  • Sufficient for basic tasks

Performance Overview
Average performance across multiple benchmarks

Single-core performance
Rank 1 - 100 %
Intel Core i7-1255U
Rank 2 - 95 %
Intel Processor U300
Multi-core performance
Rank 1 - 100 %
Intel Core i7-1255U
Rank 2 - 68 %
Intel Processor U300
Cinebench R23 Single-Core

Cinebench R23 Single-Core
Single-core performance

Intel Core i7-1255U
10C / 12T · 4.70 GHz
1,761 pts
Intel Processor U300
5C / 6T · 4.40 GHz
1,554 pts
Cinebench R23 Multi-Core

Cinebench R23 Multi-Core
Multi-core performance

Intel Core i7-1255U
10C / 12T · 2.70 GHz
7,545 pts
Intel Processor U300
5C / 6T · 1.20 GHz
4,850 pts
Geekbench 6 Single-Core

Geekbench 6 Single-Core
Single-core performance

Intel Core i7-1255U
10C / 12T · 4.70 GHz
2,136
Intel Processor U300
5C / 6T · 4.40 GHz
2,158
Geekbench 6 Multi-Core

Geekbench 6 Multi-Core
Multi-core performance

Intel Core i7-1255U
10C / 12T · 2.70 GHz
6,908
Intel Processor U300
5C / 6T · 1.20 GHz
5,096
iGPU - FP32 Performance (Single-precision GFLOPS)

iGPU - FP32 Performance (Single-precision GFLOPS)

Intel Core i7-1255U
Intel Iris Xe Graphics 96 (Alder Lake)
1,916
Intel Processor U300
Intel UHD Graphics 13th Gen (48 EU)
844

More benchmarks

At a glance

Wischen
Intel Core i7-1255UIntel Processor U300
FamilyIntel Core i7 (300)Intel Processor U (7)
CPU groupIntel Core i 1200P/1200U (21)Intel Core i 1300P/1300U (33)
ArchitectureAlder Lake URaptor Lake U
Technology10 nm10 nm
SegmentNotebookNotebook
SocketBGA 1744BGA 1744
Predecessor
SuccessorIntel Core i7-1355U

CPU Cores and Base Frequency

Wischen
Intel Core i7-1255UIntel Processor U300
CPU Cores / Threads10 / 125 / 6
Hyperthreading / SMT
Core architecturehybrid (big.LITTLE)hybrid (big.LITTLE)
Core Cluster 1: 2x Golden Cove
1.70 - 4.70 GHz
1x Raptor Cove
1.20 - 4.40 GHz
Core Cluster 2: 8x Gracemont
1.20 - 3.50 GHz
4x Gracemont
0.90 - 3.30 GHz
L2-Cache6.50 MB
L3-Cache12.00 MB10.00 MB
Overclocking

Integrated graphics (iGPU)

Wischen
Intel Core i7-1255UIntel Processor U300
GPU nameIntel Iris Xe Graphics 96 (Alder Lake)Intel UHD Graphics 13th Gen (48 EU)
GPU frequency0.35 - 1.25 GHz0.20 - 1.10 GHz
CUs / Shader96 / 76848 / 384
Raytracing
Max. displays43
Max. GPU Memory32 GB32 GB
Technology10 nm10 nm
Release dateQ1/2022Q1/2023

NPU AI performance

Wischen
Intel Core i7-1255UIntel Processor U300
AI hardware
AI specifications
NPU + CPU + iGPU

Memory & PCIe

Wischen
Intel Core i7-1255UIntel Processor U300
MemoryLPDDR5-5200 (83.2 GB/s)
DDR5-4800 (76.8 GB/s)
LPDDR4X-4266 (68.2 GB/s)
DDR4-3200 (51.2 GB/s)
LPDDR5-5200 (83.2 GB/s)
DDR5-5200 (83.2 GB/s)
LPDDR4X-4266 (68.2 GB/s)
DDR4-3200 (51.2 GB/s)
Max. Memory64 GB96 GB
Memory channels22
ECCNoNo
PCIe4.0 x 284.0 x 20
PCIe Bandwidth55.1 GB/s39.4 GB/s

Thermal Management

Wischen
Intel Core i7-1255UIntel Processor U300
TDP15 W15 W
TDP (PL2)55 W55 W
TDP up
TDP down12 W
T. junction max.100 °C100 °C

Technical details

Wischen
Intel Core i7-1255UIntel Processor U300
Chip designMonolithicMonolithic
AES-NI
Operating systemsWindows 10, Windows 11, LinuxWindows 10, Windows 11, Linux
Instruction setx86-64 (64 bit)x86-64 (64 bit)
ISA extensionsSSE4.1, SSE4.2, AVX2SSE4.1, SSE4.2, AVX2
Release dateQ1/2022Q1/2023
Release price
DocumentsTechnical data sheetTechnical data sheet

Your rating

Here you can rate one or both of the processors. The average rating of Intel Core i7-1255U is 4.1 stars (118 ratings), while Intel Processor U300 has received 3.9 stars (31 ratings).

Click on the stars to rate one or both processors.

Intel Core i7-1255U
Intel Core i7-1255U
10C / 12T · 1.70 - 4.70 GHz
Intel Processor U300
Intel Processor U300
5C / 6T · 1.20 - 4.40 GHz

Most popular CPUs in both categories

Intel Core i7-1255U
Intel Core i7-1255U
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