Intel Core i7 1255U vs Intel Core Ultra 7 270K Plus

[ VERDICT ] Winner: Intel Core Ultra 7 270K Plus (98/100)

Intel Core Ultra 7 270K Plus leads overall with a score of 98/100 compared to Intel Core i7 1255U (45/100), offering superior measured performance and technical specifications.

Intel Core i7 1255U
Intel

Intel Core i7 1255U

45/100
View Full Specs →
[ WINNER ]
Intel Core Ultra 7 270K Plus
Intel

Intel Core Ultra 7 270K Plus

98/100
View Full Specs →

Benchmark Performance Comparison

Normalized Lab Scores
Benchmark measurements and scores across compared devices
Benchmark Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Efficiency 55.0 Below Average 76.0 Good WINNER
Performance 62.0 Average 99.0 Excellent WINNER

Detailed Technical Specifications

CPU

CPU specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Base Frequency (E) 1.2 GHz 3.2 GHz
Base Frequency (P) 1.7 GHz 3.7 GHz
Bus Frequency 100 MHz 100 MHz
E-Cores 8 16
E-Threads 8 16
L1 Cache 80K (per core) 192K (per core)
L2 Cache 1280K (per core) 3MB (per core)
L3 Cache 12MB (shared) 36MB (shared)
Multiplier 17x 37x
P-Cores 2 8
P-Threads 4 8
Total Cores 10 24
Total Threads 12 24
Turbo Boost Frequency (E) 3.5 GHz 4.7 GHz
Turbo Boost Frequency (P) 4.7 GHz 5.4 GHz
Unlocked Multiplier No Yes

GeekBench v6

GeekBench v6 specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Background blur 31.6 images/sec 116 images/sec
Clang compilation 49.1 Klines/sec 297.3 Klines/sec
File compression 626.4 MB/sec 2000 MB/sec
HTML 5 Browser 179.7 pages/sec 635.2 pages/sec
PDF Renderer 201.5 Mpixels/sec 716 Mpixels/sec
Photo processing 71.1 images/sec 210.5 images/sec
Ray tracing 9.8 Mpixels/sec 59 Mpixels/sec
Text processing 217.7 pages/sec 447.5 pages/sec

General

General specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Codename Alder Lake Arrow Lake
Instruction Set x86-64 x86-64
Integrated GPU Iris Xe Graphics (96EU) Arc iGPU (4-Cores)
Model number i7-1255U 270K+
Released February 23, 2022 March 12, 2026
Successor -Intel Core Ultra 7 255U —
Type Laptop Desktop
Vendor Intel Intel
AMD Equivalent — -AMD Ryzen 9 9950X

Memory Support

Memory Support specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
ECC Support No Yes
Max. Memory Size 64 GB 256 GB
Memory Channels 2 2
Memory Types - DDR5-4800- DDR4-3200- LPDDR5-5200- LPDDR4x-4267 - DDR5-7200
Max. Memory Bandwidth — 115.2 GB/s

Misc

Misc specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Official Site Intel Core i7 1255U official page Intel Core Ultra 7 270K Plus official page
PCI Express Lanes 20 24
PCI Express Version 4.0 5.0
Technologies - Compute: ABM, ADX, BMI1, BMI2, CLMUL, F16C, SHA- Performance: EIST, TBT 2.0, TSX- Virtualization: VT-d, VT-x- Security: RDRAND, TXT, XD bit —

Package

Package specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Fabrication Process 10 nm 3 nm
Max. Boost TDP (PL2) 55 W 250 W
Peak Temperature 100°C 105°C
Socket BGA-1744 FCLGA-1851
TDP (PL1) 12-15 W (configurable) 125 W
Transistors — 17.8 billions

PassMark

PassMark specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Data compression 145.7 MBytes/sec 803 MBytes/sec
Data encryption 9.1 GBytes/sec 59 GBytes/sec
Extended instructions 8.2B Matrices/sec 63.4B Matrices/sec
Find prime numbers 38M Primes/sec 612M Primes/sec
Floating point math 32.2 GOps/sec 229.2 GOps/sec
Integer math 47.7 GOps/sec 175.8 GOps/sec
Physics 750 Frames/sec 4038 Frames/sec
Random string sorting 16.8M Strings/sec 96.8M Strings/sec

Performance Per Watt

Performance Per Watt specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Blender / Watt 5.15 PPW 4.92 PPW
Cinebench 2024 / Watt 29.7 PPW 19.9 PPW
Geekbench 6 Multi / Watt 477.3 PPW 219.2 PPW
Passmark CPU Mark / Watt 865.2 PPW 547.7 PPW

Recent User Tests

Recent User Tests specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Date Benchmark Benchmark
📘 2025-04-13(kapple) Cinebench 2024 —
📘 2026-02-13->Lello75 GeekBench —
📘 2026-04-07(IdiotStick) — Cinebench 2026
📘 2026-04-11(Daniel Comeau) — Cinebench 2026
📘 2026-06-13(sparehobos) — Cinebench 2024
📘 2026-06-25(Adnan) — Cinebench 2024
📘 2026-08-12(coolguy) — Cinebench 2026

iGPU

iGPU specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Execution Units 96 64
GPU Base Clock 300 MHz 300 MHz
GPU Boost Clock 1250 MHz 2000 MHz
Integrated Graphics Intel Iris Xe Graphics (96EU) Intel Arc iGPU (4-Cores)
ROPs 24 16
Shading Units 768 512
TGP 15 W 14 W
TMUs 48 32

Cinebench

Cinebench specifications comparison
Specification Intel Core i7 1255U Intel Core Ultra 7 270K Plus
Cinebench 2026 (Multi) — 9722
Cinebench 2026 (Single) — 595

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