GPU & CPU Mining for Beginners: Choosing Coins and Settings for Idle Compute
The first question when mining with an idle PC is usually: "What coin should my GPU or CPU mine?" This beginner guide explains the division of labor between GPU and CPU, the coin-selection logic, and the power/temperature settings newcomers most often get wrong.
GPU vs CPU: what each mines best
GPUs excel at massively parallel workloads. Popular GPU-friendly coins include:
- KAS (Kaspa), RVN (Ravencoin), ERG (Ergo) and other GPU-algorithm coins;
- Hashrate depends mainly on your GPU model; VRAM and core clocks matter.
CPUs have their own lane:
- XMR (Monero) and other RandomX coins are designed for CPUs — GPUs are ineffective on them;
- More cores means more hashrate; even office PCs can participate.
One PC can mine different coins on GPU and CPU simultaneously, each configured independently. QSHash supports GPU-only, CPU-only and GPU+CPU modes.
What is "automatic best-coin switching"?
Coin prices and network difficulty change daily — coin A leads today, coin B tomorrow. Manual monitoring is tedious and error-prone. Auto-switching works like this:
- Continuously compare your hardware's converted earnings across supported coins;
- Switch automatically to whichever currently pays better;
- The switch happens in the background with no manual action.
For idle-mining setups this is effectively "configure once, forget it".
Power and temperature: recommended beginner settings
Mining is not "the harder the better" — power caps and temperature protection protect hardware and optimize your power-cost ratio:
| Setting | Beginner recommendation | Why |
|---|---|---|
| Power cap | 70–80% of rated power | Mining output is not linear with power draw; lower power is often more efficient |
| GPU temperature | throttle at 75°C / pause at 80°C | Automatic handling; go lower for poorly-cooled machines |
| CPU usage | leave 1–2 cores for the system | Keeps the machine responsive |
Which mode: background / silent / idle-only
- Background: runs resident, for dedicated machines;
- Silent: low-impact and virtually unnoticeable, yields when you use the PC;
- Idle-only: mines only when idle, pauses instantly on games or heavy load — the go-to choice for home and internet-cafe PCs.
All three modes are a one-click choice on the Download page and can be changed anytime.
Common beginner mistakes
- Budgeting at peak coin prices: prices swing hard; estimate conservatively;
- Ignoring electricity costs: high-draw machines in expensive-power regions may not pay off — pilot small first;
- Skipping temperature protection: dangerous in summer with poor case airflow — always set thresholds;
- Deploying on unauthorized machines: company or school devices require the administrator's approval. This is a hard line.
FAQ
Q: Can integrated graphics mine?
A: Their hashrate is too low to matter. Use CPU-only mode with RandomX coins instead.
Q: Will mining make my PC laggy?
A: Not in idle-only mode — mining is fully paused whenever you are using the machine.
Q: How do I manage multiple PCs?
A: Generate your personalized launcher, batch-install it, and monitor every device's status and hashrate in one place.
This article is technical reference, not investment advice. Coin earnings fluctuate with the market. Evaluate rationally and use only on authorized devices.
Usage note
QSHash provides configuration and operations controls for authorized devices only. Follow local law, facility policy, and electricity requirements under ongoing administrator supervision.