Quick answer: Our top pick in 2026 is the RTX 4070 / 5070 — our #1 rated choice. See the full ranked comparison, alternatives and buying advice below.
GPU Overclocking: Free Performance You’re Leaving on the Table
Every modern GPU ships with clock headroom left on the table. With the right software and a patient, step-by-step approach you can squeeze out 10–15% more performance for free — no new hardware on the shopping list. This walkthrough covers safe GPU overclocking for both NVIDIA and AMD cards in MSI Afterburner.
What You Need Before Overclocking
Before starting, gather these free tools:
- MSI Afterburner — the universal GPU overclocking tool (works on NVIDIA and AMD)
- GPU-Z — monitor real-time clock speeds, temperatures, and VRAM usage
- 3DMark (free tier) — benchmark to measure performance before and after
- Unigine Superposition — stress test for stability
Step-by-Step GPU Overclocking with MSI Afterburner
Step 1: Establish Your Baseline
Fire up 3DMark TimeSpy and jot down your score. While you’re at it, log your card’s stock boost clock, temps, and power draw in GPU-Z. That’s your baseline — the numbers you’ll measure every gain against and lean on to confirm stability.
Step 2: Increase Power Limit and Temperature Limit
Inside MSI Afterburner, push the Power Limit to 110–115% and set the Temperature Limit to 90°C. That lets the card pull more watts and hold higher boost clocks for longer instead of throttling itself early. Apply and save.
Step 3: Overclock the Core Clock
Dial in a +100MHz to Core Clock offset. NVIDIA’s boost algorithm stacks this on top of the base boost, so your real-world clock will float around a bit. Play for 20 minutes or run a Superposition stress test. If it holds up — no crashes, artifacts or driver resets — add another +50MHz and go again.
Step 4: Overclock the Memory Clock
Now add +500MHz to Memory Clock (that’s effective MHz for GDDR6X — the tool may report it as +1000). In VRAM-bandwidth-limited games, memory tuning often nets bigger FPS gains than core OC. Test for stability, then climb in +200MHz steps until artifacts or crashes show up.
Step 5: Test for Stability
Run Unigine Superposition for 30 minutes at your final overclock, then play your heaviest game for an hour or more. Any crash, texture corruption or driver timeout means you back the memory clock off by 200MHz and retest. You’re chasing the highest stable OC here, not the biggest number on screen.
Step 6: Save Your Profile
Once it’s rock solid, save the overclock as Profile 1 in MSI Afterburner and tick “Start with Windows” and “Apply overclocking at system startup”. From there your OC loads itself on every reboot, no babysitting required.
Safe Overclocking Limits by GPU
| GPU | Safe Core OC Range | Safe Memory OC Range | Expected Gain |
|---|---|---|---|
| RTX 4070 / 5070 | +100–200MHz | +500–1000MHz | 8–12% |
| RTX 4080 / 5080 | +75–150MHz | +400–800MHz | 6–10% |
| RTX 5090 | +50–100MHz | +300–600MHz | 5–8% |
| RX 7800 XT / 9070 | +100–200MHz | +500–1000MHz | 8–15% |
| RX 9070 XT | +100–175MHz | +400–800MHz | 7–12% |
Should You Undervolt Instead?
Undervolting trims power and heat without giving up performance. Using the Voltage/Frequency curve editor in MSI Afterburner, you can pin a stable OC point at a lower voltage — dropping temps by 5–10°C and power draw by 20–40W while holding the same frame rates, often a touch better.
