Home > CPU Comparisons > Core i5 8257U or Core i5 1135G7: what's better?

Intel Core i5 8257U vs i5 1135G7

We compared two 4-core laptop CPUs: the 1.4 GHz Intel Core i5 8257U against the 0.9-2.4 GHz i5 1135G7. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.


General overview and comparison of the processors
Single-Core Performance
Performance in single-threaded apps and benchmarks
Measure performance when all cores are involved
Power Efficiency
The efficiency score of electricity consumption
NanoReview Final Score
Generic CPU rating

Key Differences

What are the key differences between 1135G7 and 8257U
Advantages of Intel Core i5 8257U
  • Consumes up to 46% less energy than the Core i5 1135G7 – 15 vs 28 Watt
Advantages of Intel Core i5 1135G7
  • Newer - released 1-year and 2-months later
  • Supports up to 64 GB DDR4-3200 RAM
  • More powerful Iris Xe Graphics G7 80EU integrated graphics: 1.41 vs 0.81 TFLOPS
  • More modern manufacturing process – 10 versus 14 nanometers
  • 41% faster in a single-core Geekbench v5 test - 1318 vs 932 points
  • Has 2 MB larger L3 cache size
  • Newer PCI Express version – 4.0
  • 8% higher Turbo Boost frequency (4.2 GHz vs 3.9 GHz)


Comparing the performance of CPUs in benchmarks
Cinebench R20 (Single-Core)
Cinebench R20 (Multi-Core)
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)


Full technical specification of Intel Core i5 8257U and i5 1135G7


Vendor Intel Intel
Released July 9, 2019 September 2, 2020
Launch price 320 USD -
Type Laptop Laptop
Codename Coffee Lake Tiger Lake UP3
Model number i5-8257U i5-1135G7
Socket BGA-1528 BGA-1449
Integrated GPU Iris Plus Graphics 645 Iris Xe Graphics G7 80EU


Cores 4 4
Threads 8 8
Base Frequency 1.4 GHz 0.9-2.4 GHz
Turbo Boost Frequency 3.9 GHz 4.2 GHz
Bus frequency - 100 MHz
Multiplier 14x 9-24x
Bus Bandwidth 4 GT/s 4 GT/s
L1 Cache 32K (per core) 80K (per core)
L2 Cache 256K (per core) 1250K (per core)
L3 Cache 6MB (shared) 8MB (shared)
Unlocked Multiplier No No


Fabrication process 14 nm 10 nm
TDP 15 W 12-28 W
Max. temperature 100°C 100°C


Integrated Graphics Intel Iris Plus Graphics 645 Iris Xe Graphics G7 80EU
GPU Base Clock 300 MHz 300 MHz
GPU Boost Clock 1050 MHz 1100 MHz
Shading Units 384 640
TMUs 48 40
ROPs 6 20
Execution Units 48 80
TGP 15 W 15 W
Max. Resolution 4096x2304 - 60 Hz -

Memory support

Memory types DDR4-2400, LPDDR3-2133 DDR4-3200, LPDDR4-4267
Memory Size 32 GB 64 GB
Max. Memory Channels 2 2
Max. Memory Bandwidth 37.5 GB/s -
ECC Support No No


Official site Intel Core i5 8257U official page Intel Core i5 1135G7 official page
PCI Express Version 3.0 4.0
PCI Express Lanes 16 16
Instruction Set SSE4.1, SSE4.2, AVX-2 -

Cast your vote

Choose between two processors
1 (20%)
4 (80%)
Total votes: 5


So which CPU will you choose: Intel Core i5 1135G7 or i5 8257U?