1080p · high settings
from £1,050
| CPU | Ryzen 7 7700 / Core i5-13600KF |
|---|---|
| GPU | RTX 4060 / RX 7600 |
| RAM | 32GB DDR5-6000 |
| Storage | 1TB NVMe SSD |
Cores and clocks first — a modest GPU is entirely adequate here.
— BUILD GUIDE · GAMING PCREF · 20260730
Best PC for Cities: Skylines II in 2026
CPU bound
Specs verified July 2026 · built & warrantied in the UK by FixFixLabs
— The short answer
Cities: Skylines II is a simulation game — late-game performance is decided almost entirely by the CPU, because every citizen and vehicle is simulated each tick. A large city brings a GPU-heavy, CPU-light build to a crawl. Prioritise a fast multi-core CPU and 32GB RAM. A FixFixLabs build starts around £1,050.
— HARDWARE · PRIORITIESREF · 20260730
What actually matters for Cities: Skylines II
Simulation and strategy games are CPU-limited in the late game regardless of GPU tier, because AI and entity simulation runs every tick. As your city grows, the CPU decides your frame rate. A strong GPU with a weak CPU will still stutter in a big city. Spend on cores and clock speed and 32GB RAM.
- Late-game frame rate is CPU-limited no matter the GPU.
- 32GB RAM helps with large, detailed cities.
- GPU tier barely changes late-game simulation speed.
- One of the clearest cases where a CPU upgrade directly improves gameplay.
— SPEC SHEETS · BY TARGETREF · 20260730
Recommended Cities: Skylines II builds by target
1440p · balanced
from £1,250
| CPU | Ryzen 7 7800X3D |
|---|---|
| GPU | RTX 4060 Ti 16GB / RX 7700 XT |
| RAM | 32GB DDR5-6000 |
| Storage | 1TB NVMe SSD |
The X3D cache measurably steadies simulation tick rate in big cities.
4K · max visuals
from £1,700
| CPU | Ryzen 7 9800X3D |
|---|---|
| GPU | RTX 4070 Ti Super / RX 7900 XT |
| RAM | 32GB DDR5-6000 |
| Storage | 2TB NVMe SSD |
4K raises GPU load, but your late-game ceiling is still the CPU.
Prices indicative for July 2026, UK market. Component prices move weekly — your personalised quote shows exact current pricing.
— Free build brief
Get a Cities: Skylines II spec built for your budget
Tell us your budget and resolution and we'll return a named parts list with itemised UK pricing within 24 hours. Cities: Skylines II builds start from £1,050.
Get my spec & price— FAQ · BUILD QUESTIONSREF · 20260730
Cities: Skylines II PC — frequently asked questions
Why does my Cities: Skylines II frame rate drop as my city grows?
Because the game simulates every citizen and vehicle each tick, and that work lands on the CPU. As the city grows the simulation cost grows with it, so frame rate falls regardless of how strong your graphics card is.
Will a better graphics card fix late-game lag?
No. Late-game performance is CPU-limited, so a GPU upgrade barely moves the needle. A faster CPU — and 32GB of RAM — is the upgrade that actually helps.
How much RAM do I need?
32GB. Large, detailed cities with mods and assets comfortably exceed what 16GB can hold, and once you spill over you get stutter on top of the simulation load.
Can you build a Cities: Skylines II PC in the UK?
Yes. FixFixLabs builds, tests and warranties custom simulation machines in the UK. Tell us your budget and city size ambitions and we'll return an itemised parts list within 24 hours.
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