BUILD THE WORLDYOUR WAY
Sandbox games reward a different kind of hardware than shooters or racers. A 500-mod Minecraft save needs different resources than a Factorio megabase or a Cities: Skylines II metropolis. Every HOENGAGER sandbox build is matched to a specific mod-load tier and simulation-scale target.
SANDBOX.
SCALE.
Sandbox and creator games stress hardware differently than any other genre. The GPU matters less than you'd expect — a modern mid-range card renders these games comfortably. What actually breaks first is the CPU single-thread performance (mod scripts, physics, tick rate), system RAM capacity (mod load, world size, entity count) and storage speed (loading a 2GB modpack or saving a city simulation). A good sandbox PC is a CPU-first, RAM-heavy, NVMe-focused build — not a GPU showcase.
EIGHT WORLDS.
ONE RIG.
From voxel survival to factory automation to city simulation. Performance data below is based on our own testing with a Ryzen 7 9800X3D and RTX 5070 Ti-class hardware.
WHAT WE MEASURE
IN EACH WORLD.
Each sandbox title stresses different parts of the hardware pipeline. These notes summarize our measured results on HOENGAGER test systems and the build that hits a specific mod-load and simulation-scale target.
Modded Minecraft is a RAM and single-thread workload, not a GPU one.
Vanilla Minecraft runs on almost anything. A heavily modded world with shaders is a different story. In our own testing, a modded Minecraft install with 500+ mods and shaders on a Ryzen 7 9800X3D + RTX 5070 Ti holds stable 180+ FPS at 1440p with shaders enabled while maintaining chunk generation speed during fast travel. Allocating 12–16GB RAM to the Java heap alone is normal for a 500-mod pack — which means 32GB system RAM is the practical minimum. The GPU is rarely the bottleneck; the CPU handles tick rate, entity AI, chunk generation and mod script execution. Without a fast single-thread CPU, chunk loading stutters visibly even with a flagship GPU.
- 500+ mods + shaders: 180+ FPS at 1440p, stable chunk loading
- RAM note: 12–16GB Java heap is standard; 32GB system RAM minimum
- CPU note: single-thread performance drives chunk generation speed
Cities: Skylines II is CPU-limited from the first 10K citizens.
Cities: Skylines II is one of the most CPU-intensive games in the entire consumer space. It simulates every citizen, vehicle, water flow, pollution path and power grid connection individually — every second. In our own testing, a Ryzen 7 9800X3D maintains 60+ FPS at 1440p High settings up to ~100K population. Above 200K population, no consumer CPU sustains 60 FPS — the simulation simply cannot be parallelized further. The official "recommended" spec lists 16GB RAM, but community benchmarks show 32GB is required to avoid stutter once the city passes 50K population. A Gen4 NVMe is not optional — autosaves on a 200K city write 500MB+ to disk.
- 100K population: 60+ FPS at 1440p High
- 200K+ population: CPU-bound regardless of GPU tier
- RAM note: 32GB prevents stutter past 50K population
Factorio rewards CPU cache more than any other sandbox game.
Factorio's "megabase" community runs factories producing 10,000 science per minute — that is 10,000+ active entities simulated simultaneously. The game's engine is heavily optimized for cache locality, which is why X3D CPUs with 96MB L3 cache dramatically outperform non-X3D equivalents at megabase scales. In our own testing, a Ryzen 7 9800X3D holds 60 UPS (updates per second) at factory scales where a Ryzen 7 9700X drops to 45 UPS. GPU load remains near zero throughout — a GTX 1650 renders a megabase identically to an RTX 5070 Ti. This is the clearest example of why the CPU determines the sandbox upgrade budget.
- 10K SPM megabase: 60 UPS stable on X3D
- GPU note: any modern GPU handles Factorio; the CPU is the ceiling
- Cache note: 96MB L3 makes a measurable UPS difference
RimWorld's mod ceiling is set by single-thread CPU speed.
RimWorld is a colony simulation where every pawn, animal, item and temperature value runs on the game thread. Its engine does not scale across CPU cores, which means single-thread performance is the only metric that matters. A 300-mod colony late-game drops a Ryzen 7 9700X to 30 TPS (ticks per second) where a 9800X3D maintains 60 TPS. RAM matters less than in Minecraft — 16GB is workable, 32GB is comfortable with heavy mods. GPU load is essentially zero; RimWorld runs on integrated graphics.
- 300-mod colony: 60 TPS stable on 9800X3D
- CPU note: single-thread performance is the only upgrade lever
- GPU note: RimWorld runs on integrated graphics
WHAT MODS
ACTUALLY COST.
Mods stress different subsystems than base games. These are the four hardware layers that most affect mod-load performance.
RAM Capacity
The single most common bottleneck. Modded Minecraft and Cities: Skylines II easily exceed 16GB. For 500+ mod packs, 32GB is the floor and 64GB is comfortable.
CPU Single-Thread
RimWorld, KSP, Factorio and Garry's Mod all run their simulation on one core. X3D CPUs with 3D V-Cache measurably outperform non-X3D at these workloads.
NVMe Storage
Large modpacks, big saves and content creation all benefit. Loading a 2GB modpack from SATA SSD takes 4-6× longer than Gen4 NVMe. Autosaves on huge saves demand fast writes.
GPU Headroom
Less critical than in shooters or racers. A modern mid-range GPU handles shaders and high-fidelity textures. 12GB VRAM is the safe target for shader-heavy mods.
EVERY TICK.
EVERY MOD.
Choose your performance level around the mod-load tier and simulation scale you actually run — not raw resolution.
VANILLA / LIGHT MODS
Vanilla Minecraft, The Sims 4 base game, Terraria vanilla. Ryzen 5 9600X + RTX 5060 handles everything comfortably at 1440p with 16GB RAM.
200–500 MOD PACKS
Modded Minecraft with shaders, Garry's Mod workshop collections, Kerbal with visual mods. Ryzen 7 7800X3D / 9800X3D + RTX 5070 Ti with 32GB RAM.
MEGABASE / 200K+ POP
Factorio megabases, Cities: Skylines II 200K+ population, 500+ mod Minecraft packs. Ryzen 7 9800X3D + RTX 5080 with 32–64GB RAM and 2TB Gen4 NVMe.
RYZEN 7 7800X3D + RTX 5070 Ti
The sweet spot for modded Minecraft, Cities: Skylines II up to ~100K population, and general content creation. 32GB DDR5-6000 is the recommended floor for 200-500 mod packs. X3D cache matters more than clock speed here.
RYZEN 7 9800X3D + RTX 5080
For Factorio megabases, 500+ mod Minecraft packs, Cities: Skylines II 200K+ population, and heavy content creation with simultaneous streaming. 64GB DDR5 is worth considering for large-scale creator workflows.
ANSWERS FOR
SANDBOX PLAYERS.
The five questions US sandbox and mod-heavy players ask us most often before choosing a PC.
How much RAM do I need for modded Minecraft in 2026?
Why is Cities: Skylines II so CPU-heavy?
Does a better GPU help with Factorio megabases?
Is a Gen4 NVMe SSD necessary for sandbox and creator games?
How much should I spend on a sandbox / creator PC in 2026?
BUILD.
BREAK. REPEAT.
From vanilla survival to 500-mod megabases, from city simulations to aerospace physics — choose a Hoengager gaming PC built for the worlds you want to create. Every build is matched to a specific mod-load tier and simulation-scale target.