Hall Effect Keyboards Explained: Rapid Trigger, Adjustable Actuation, and Why Gamers Are Switching

ByDana Whitfield

Hall Effect Switches Don’t Work Like Mechanical or Optical Ones

Traditional mechanical switches close a physical contact when you press a key past a fixed point. Optical switches replaced that contact with an infrared beam — faster, but still a binary on/off signal. Hall effect switches are a different architecture entirely. Each switch has a small magnet in the stem, and a sensor on the PCB continuously reads the magnet’s position as you press. The keyboard always knows exactly how far down a key is, to fractions of a millimeter, all the time.

That continuous position data is what makes rapid trigger and adjustable actuation possible. Optical switches can’t do this — the sensor either sees the beam or it doesn’t. There’s no in-between to measure. That distinction matters more than it might sound.

What Rapid Trigger Actually Does

On a standard mechanical keyboard, a key actuates at a fixed depth — typically around 2mm — and won’t reset until you lift back past a defined reset point slightly above that. If you’re counter-strafing in CS2 or Valorant, that reset travel is dead time. You’re waiting for the hardware to catch up to what your finger already did.

Rapid trigger eliminates those fixed points. The key registers the moment you start pressing, and resets the moment you start releasing, regardless of where you are in the travel. A keyboard set to 0.1mm sensitivity will re-register as soon as you’ve moved the key up by a tenth of a millimeter. One hardware analysis put that at roughly 7.7ms off a single counter-strafe, compared to a 0.5mm reset point. Not enormous in isolation, but consistent across every key press.

One thing worth knowing upfront: rapid trigger is not banned in CS2. Valve has confirmed it as legal input hardware.

The Ajazz AK820 Max HE

The AK820 Max HE is a 75% layout board at $69.99 in its wired configuration. The wired version runs an 8000Hz polling rate — the wireless Tri-mode version drops to a narrower rapid trigger window of 0.2–2.5mm, so if 0.1mm sensitivity is the goal, the wired edition is the one to buy.

Reviewers have flagged some calibration quirks at the 0.1mm minimum end of the range, and the software can be finicky. Build quality for the price is consistently praised. For a sub-$70 board with 8K polling and full rapid trigger, the value is genuinely hard to argue with.

The Monsgeek Fun60 Pro

The Fun60 Pro covers the 60% form factor at a significantly lower price — around $33–34. It uses AKKO Glare Magnetic Switches with a 40–45g actuation force and runs at 8KHz polling. The stated minimum travel the sensor can detect is 0.01mm, which is effectively the floor for current HE hardware.

Switch feel gets consistently good marks for the price. Box-style stems reduce wobble noticeably, and the feel is described as cleaner than competing boards in the same bracket. The software is browser-based, so there’s no desktop install — a small but genuine convenience.

Why Optical Keyboards Feel Different

Razer’s optical switches, and optical switches broadly, are binary inputs. The beam either fires or it doesn’t. That makes them fast — no debounce needed — but the actuation model is still fixed: cross the beam, key fires. No adjustable depth, no continuous sensing, no rapid trigger.

Someone coming from mechanical linears who tries an optical board often finds the feel similar enough that the gap isn’t dramatic. The switches are responsive, but without position tracking, the hardware can’t do anything with that information. Hall effect adds a full analog layer on top of the speed advantage. That’s the actual difference between them, and it explains why the feel doesn’t carry over.

Rapid Trigger Settings Worth Knowing

Not every key benefits from running at 0.1mm. Most competitive players set movement keys — WASD — somewhere between 0.1mm and 0.3mm, and leave other keys higher. Spacebar at minimum sensitivity tends to misfire. A reasonable starting configuration is 0.2mm on WASD and around 0.4mm elsewhere, then adjust based on how many accidental inputs you’re getting in the first few sessions.

Actuation point and rapid trigger sensitivity are two separate settings. Actuation point controls how deep the key needs to go before it fires. Rapid trigger controls how quickly it resets after that fire. Both together define what a key actually feels like under your finger.

A Quick Settings Reference

  • Movement keys (WASD): 0.1–0.3mm rapid trigger, actuation point 0.3–0.8mm
  • Other keys: 0.3–0.5mm rapid trigger, actuation point 1.0–2.0mm
  • Spacebar: Start higher (0.5mm+) — prone to accidental fires at minimum

Who HE Keyboards Actually Benefit

Competitive FPS is the primary use case. Rhythm game players have moved to rapid trigger for similar reasons — faster reset means cleaner note separation on fast patterns. Outside those two, the advantage is real but less decisive. Casual players will notice the snappier feel, especially with a low actuation point, but probably won’t clock a meaningful competitive difference against someone on a mechanical linear.

Coming back to a fixed-actuation board after a few weeks with rapid trigger tends to feel sluggish. That’s probably the clearest indicator of how much the feature changes baseline expectations.

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