This Hunk 'O Junk Plays Roblox

8 parts · $1267.29 estimated · Created Aug 4, 2026

Parts list

AMD Ryzen 7 5800X8C/16T · 4.7 GHz boostAMD$219.00↓ AmazonAmazon ↗Newegg ↗
ASRock Challenger Arc B580 (Black)12GB VRAM · 249mm longASRock$309.99↓ AmazonAmazon ↗Newegg ↗
Patriot P300512GB · PCIe 3.0 NVMePatriot$99.99Amazon ↗Newegg ↗
Montech Century II (Silver)850W · ATXMontech$89.90Amazon ↗Newegg ↗
Antec Luna 360 ARGB (White)AIO liquid · 360mm radiatorAntec$47.99Amazon ↗Newegg ↗
Kingbank DDR4DDR4-3200 · 2×16GB (32GB)Kingbank$179.99↓ AmazonAmazon ↗Newegg ↗
SilverStone FLP02 (Silver)fits GPU ≤386mm · cooler ≤182mmSilverStone$227.99Amazon ↗
MSI B550-A PRO ProSeries Gaming PCmsi$92.44Amazon ↗

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CBuild Score 76/100A capable 1080p gaming build. Biggest lever: Older platform — limited CPU upgrade path without swapping motherboard + RAM.

Choose a use case to see how this build scores for it:

1080p gaming: A capable 1080p gaming build. Biggest lever: Older platform — limited CPU upgrade path without swapping motherboard + RAM.

How to improve · 4 pts to B

CPU/GPU balancecosting ~14 pts

GPU-limited — measured at the 1080p reference, a stronger GPU would unlock about +100% with this CPU (median 82 fps today). CPU: entry-level, GPU: mid-range.

Expected performancecosting ~4 pts

82 fps median across 5 demanding games at 1080p · 60% above 60 fps, 0% above 100 · via HowManyFPS

Open in builder to apply these →

Expected FPSfollows the Build Score scenario

Expected FPS · 1080p

For Ryzen 7 5800X + Arc B580, default settings. Estimates only — your actual framerate may be higher or lower.

Cyberpunk 2077
1920×1080 · High
93 avg
70 1% low
Black Myth: Wukong
1920×1080 · High · RT Off
41 avg
30 1% low
Hogwarts Legacy
1920×1080 · High
82 avg
50 1% low
Alan Wake 2
1920×1080 · High · RT Off
38 avg
28 1% low
Call of Duty: Black Ops 6
1920×1080 · Ultra
94 avg
64 1% low
Counter-Strike 2
1920×1080 · High
311 avg
217 1% low

Estimates via HowManyFPS · cached up to 24 hours.

Why these are estimates?

These numbers are model-predicted averages, not measured benchmarks of your specific system. Treat them as ballpark guidance, not a promise. Real framerate depends on:

Your full system (RAM speed, storage, drivers, OS, background load)
In-game scene complexity, multiplayer player count, mods
Driver updates and game patches after this estimate was made
Display, thermals, and how your case manages airflow

If you want a measured number for your specific build, the only reliable answer is to benchmark it yourself once you own the parts.

Balance

GPU-bound (50%)

GPU-limited at 1080p gaming — measured against real FPS data, a stronger GPU would unlock about +100% with this CPU (median 82 fps → ~127 fps across 5 demanding AAA games).

Compatibility

All checks pass

Power

PSU Excellent · 416W draw / 850W

Physical fit

GPU + cooler clear the case

Spec-sheet guidance — verify before buying.