Overclocking the RX 580
The RX 580 is a Polaris card with a little headroom left in it, and Afterburner makes it straightforward to find. This is the one guide where you can actually hurt something or waste an afternoon chasing a regression, so it is slow and methodical on purpose: one slider at a time, a benchmark after every change, and an honest warning about the memory quirk that trips most people up.
Read before you touch a slider
Overclocking is at your own risk. A push too far causes driver crashes, artifacts, or lock-ups, and sustained over-volting shortens a card’s life. This is not anti-cheat or ban risk — it is hardware risk. Change one value at a time, test each change with the same benchmark for a few minutes, and write down what you changed. If anything goes wrong, hit Afterburner’s reset and you are back to stock. None of this is permanent unless you let an unstable clock cook for a long time.
What you need
MSI Afterburner for the clocks and power limit, and a way to see what is happening — its bundled overlay, RivaTuner, plus a repeatable load. A loop of a known benchmark or a graphically heavy game scene works; you want the same test every time so the numbers are comparable.
One thing first: update your GPU driver before you start, the same fresh driver the diagnostics scan nags about. There is no point tuning clocks on top of a year-old driver.
1 Power Limit +20 → +50% 2 Core Clock +10 MHz steps → first artifact 3 Memory Clock small steps, watch FPS (not just stability) 4 Voltage leave default 5 Stress test 30+ min on the same load
Step by step
Do these in order. Apply, run the benchmark, watch for artifacts and crashes, then move on. Resist the urge to move two sliders at once — if it crashes you will not know which one did it.
- 01
Power Limit first — push it to the top
Drag Power Limit up to its maximum, typically
+20to+50%depending on the card’s BIOS. This does not overclock anything by itself — it just stops the card throttling its clocks to stay inside a power budget, so the clocks you set later can actually hold.The trade is more heat and fan noise. Check temperatures stay sane (an RX 580 is fine into the
70s – low 80s °Con the GPU); if your card runs hot, raise the fan curve too. - 02
Core clock — climb in +10 MHz steps to the first artifact
Raise the Core Clock in small increments —
+10 MHzat a time. Apply, run the benchmark a couple of minutes, look for visual artifacts (flickering, stray dots, weird textures) or a driver crash. A well-binned RX 580 commonly lands somewhere around1380–1400 MHz, but yours might do less — silicon lottery is real.The moment you see the first artifact or crash, you have found the edge. Drop back
20–30 MHzfrom there for a stable daily clock. Stability at idle means nothing — it is the loaded benchmark that tells the truth. - 03
Memory — the Polaris trap (watch FPS, not just stability)
This is the part that catches people. Raise the Memory Clock cautiously toward roughly
2050–2100 MHzin small steps. But here is the honest, important catch:Polaris memory has built-in error correction. Push it too far and instead of crashing, the card silently spends cycles fixing errors — so your FPS actually drops while everything still looks perfectly stable. You cannot find the limit by waiting for a crash. You have to watch the benchmark’s frame rate at each step: the right memory clock is the one where FPS is highest, not the highest clock that does not crash. When the next step stops improving FPS — or lowers it — back off to the last one that gained.
- 04
Leave voltage at default
Resist adding voltage. On Polaris the gains from extra voltage are tiny and the cost — heat and long-term wear — is not worth it for a card of this class. Keep the voltage slider where it is and take whatever clock the stock voltage gives you. A modest, cool overclock you can run forever beats a hot one you are nervous about.
- 05
Stress test for 30+ minutes
Once core and memory are set, run a sustained load — the same benchmark on loop, or a long gaming session — for at least 30 minutes, ideally longer. Short tests pass that fall over after twenty minutes of real heat soak. Watch for artifacts, crashes, and any FPS sag as the card warms up.
Stable for half an hour and gaining FPS over stock? Save it as an Afterburner profile and set it to apply at startup. If it ever acts up weeks later, drop the core a touch — cards can need a little more margin as they age.
Reference settings
Starting points for a typical RX 580, not guarantees — every card is different. Treat the clock figures as ballpark targets you confirm with the benchmark, not values to type in blind.
| Slider | Where to aim | How you know you are right |
|---|---|---|
| Power Limit | +20 to +50% | Set to max; just check temps stay in range |
| Core Clock | ~1380–1400 MHz | Highest clock with no artifacts/crash, minus a small safety margin |
| Memory Clock | ~2050–2100 MHz | The clock where FPS peaks — not the highest stable one (error correction) |
| Voltage | default | Untouched. Gains are not worth the heat on Polaris |
| Fan curve | aggressive | GPU stays in the 70s–low 80s °C under load |
| Stress test | 30+ min | No artifacts, no crash, no FPS sag as it heat-soaks |
Be honest with yourself about the payoff
An RX 580 overclock is a single-digit-percent gain on a good day — real, but small. If your diagnostics scan still shows RAM below rated speed or an old driver, fix those first: they are bigger, free, and risk-free. An overclock is the polish you add after the easy wins are banked, not a substitute for them. Run the msi tweak too — lower DPC latency on the GPU helps frametime consistency regardless of clocks.