Roblox: will it run, fix lag, what to buy
Light on the graphics card, heavy on the processor in crowded servers. Needs 4GB of RAM at minimum. Checked 20 Oct 2026.
Check your PC for Roblox
Pick your parts and see the FPS our model expects. This is the same engine as the main Can I Run It? checker.
What each kind of PC manages
Model estimates at 1080p with 16GB of RAM. Laptop and integrated chips use Notebookcheck-derived data and are the roughest figures.
| Hardware | Low | High |
|---|---|---|
| Old school laptop Intel UHD 620 graphics, Core i5-8250U | 12 | 8 |
| Recent thin laptop Intel Iris Xe (80EU), Core i5-1235U | 43 | 27 |
| Handheld / modern APU Radeon 780M, Ryzen 7 7840HS | 102 | 66 |
| Old family PC GTX 1060 6GB, Core i5-8400 | 147 | 95 |
| Budget gaming PC GTX 1650, Ryzen 5 5600 | 124 | 80 |
| Solid 1080p PC RX 6600, Ryzen 5 5600 | 279 | 180 |
| Current mid-range PC RTX 4060, Ryzen 5 7600 | 302 | 195 |
| High-end PC RTX 4070, Ryzen 7 7800X3D | 465 | 300 |
FPS at 1080p, 16GB RAM. Green is 60 or more, amber 30 to 59. Platform · Also on PlayStation and Xbox.
Fix Roblox lag in five lines
- Find out which kind of lag you have first. Low FPS, stutter and ping each have a different fix. Run the Lag Doctor →
- Roblox is mostly limited by the graphics card, so lowering shadows, effects and resolution is the biggest lever.
- Check your memory: Roblox needs 4GB of RAM at minimum and recommends 8GB. Below the minimum you get long freezes whatever the graphics card.
- Drop the preset one step. In our model Low settings give about 55% more FPS than High.
- On a laptop, plug in and set the power mode to Best performance. If your screen is smooth but other players rubber-band, the problem is ping, not FPS.
We never recommend FPS or ping booster apps.
How much RAM does Roblox need?
RAM figures are the publisher's published requirements as recorded in our engine. Check your card in the VRAM Checker →
The cheapest PC that runs Roblox
Graphics card plus the cheapest processor that does not hold it back, for 60 FPS at 1080p. Parts only: you also need a motherboard, RAM, drive, power supply and case.
| Target | Used | New |
|---|---|---|
| 60 FPS at 1080p, Low settings | £160 RX 580 8GB £50 + Ryzen 5 5600 £110 · 155 FPS | £435 RTX 3050 8GB £325 + Ryzen 5 5600 £110 · 209 FPS |
| 60 FPS at 1080p, High settings | £160 RX 580 8GB £50 + Ryzen 5 5600 £110 · 100 FPS | £435 RTX 3050 8GB £325 + Ryzen 5 5600 £110 · 135 FPS |
Approximate UK prices checked 18 Oct 2026; they move weekly. Used cards are eBay UK asking prices. Looking for a card? Search Amazon UK (affiliate link).
Best plan at £300, £500 and £800
| Budget | Keep your PC: add a card | Buy a new PC |
|---|---|---|
| £300 | RTX 3070 8GB (used, £220) 280 FPS | outside this budget |
| £500 | RTX 3070 8GB (used, £220) 280 FPS | Budget 1080p tier 180 FPS · parts about £290 |
| £800 | RTX 3070 8GB (used, £220) 280 FPS | Sweet Spot tier 220 FPS · parts about £470 |
Roblox kits
Free Roblox tools
- GamerKit FPS model (labelled estimates; calibration notes in the Can I Run It? tool)
- Notebookcheck laptop and desktop game results, joined by GamerKit (collected 18 Oct 2026)
- GPU PRIX and GPU Price History (new UK prices), eBay UK asking prices (used), checked 18 Oct 2026
Everything on this page is either a labelled model estimate or a figure with its source named. Blocks without sourced data are left out rather than filled in.