North-Facing vs South-Facing Switches: Keycap Interference Explained [2026 Guide]
If you have a gaming keyboard and just bought Cherry profile keycaps that feel "mushy" on certain rows, you've hit north-facing interference. It's the most common compatibility issue in the keycap world, and most people don't know about it until it's too late. This guide explains what it is, how to check for it, and how to solve it.
What is North-Facing Switch Interference?
When a mechanical keyboard switch is mounted "north-facing," the LED hole points toward the top of the keyboard (toward your monitor). When it's "south-facing," the LED hole points toward you.
This orientation matters because Cherry profile keycaps can physically collide with the top housing of north-facing switches.
How It Happens
Cherry profile keycaps are the lowest sculpted profile available (6.3mm–9.4mm depending on row). On rows R3 and R4 (the lowest rows), the inner wall of the keycap extends very close to the switch housing.
- South-facing switches: The taller part of the switch housing faces away from the keycap's lowest wall. No collision. Everything works perfectly.
- North-facing switches: The taller part of the housing faces the keycap's lowest wall. On the bottom rows, the keycap wall hits the housing before the stem fully bottoms out.
What Does Interference Feel Like?
- Mushy bottom-out — the keycap stops abruptly on the housing instead of smoothly bottoming out on the stem
- Inconsistent feel — some rows feel normal, others feel off (R3/R4 are usually affected most)
- Altered sound — the collision with the housing creates a different, often higher-pitched sound
- Slightly reduced travel — the key doesn't travel its full distance
It's not catastrophic, and some people don't notice or don't mind. But if you're used to the clean bottom-out of Cherry profile on south-facing boards, the difference is obvious.
How to Check Your Switch Orientation
Method 1: Remove a Keycap and Look
1. Pull off any keycap (use a keycap puller or gently wiggle)
2. Look at the exposed switch
3. Find the LED slot or the two small pin holes on the switch housing
- LED slot/pins at the TOP (toward your monitor) = North-facing
- LED slot/pins at the BOTTOM (toward you) = South-facing
Method 2: Check Your Keyboard Model
Typically North-Facing:
- Most Razer keyboards (Huntsman, BlackWidow series)
- Most Corsair keyboards (K70, K100, K65)
- Many Logitech keyboards (G Pro X, G715)
- Keychron K-series (K2, K6, K8 — older revisions)
- Many budget boards (Royal Kludge, Redragon, some Akko)
- Most boards that emphasize RGB lighting
Typically South-Facing:
- Keychron Q-series (Q1, Q2, Q3, Q5, Q6)
- Keychron V-series
- GMMK Pro / GMMK 2
- Ducky keyboards
- Leopold keyboards
- Varmilo keyboards
- Most custom/enthusiast keyboards
- QMK-compatible boards
Important: Manufacturers sometimes change switch orientation between revisions. Always verify your specific model.
Which Keycap Profiles Are Affected?
This is the critical table:
| Profile | Max Height | North-Facing Interference? | Why |
|---|---|---|---|
| Cherry | 9.4mm | ⚠️ YES | Lowest sculpted profile — inner wall hits the switch housing |
| OEM | 11.9mm | ✅ No | Tall enough to clear the housing on all rows |
| XDA | ~9.8mm | ✅ No | Uniform shape with angled walls that clear the housing |
| MDA | ~11.5mm | ✅ No | Medium height with sufficient clearance |
| SA | 16.5mm | ✅ No | Very tall — impossible to interfere |
| DSA | ~7.6mm | ✅ No | Low but uniform shape with different wall geometry |
Only Cherry profile is affected. Every other common profile is safe on north-facing switches.
Which Rows Are Most Affected?
Not all rows experience the same level of interference:
| Row | Keys | Cherry Height | Interference Level |
|---|---|---|---|
| R1 (top) | F-keys, Number row | 9.4mm | Minor or none |
| R2 | QWERTY row | 7.9mm | Moderate |
| R3 | Home row (ASDF) | 6.6mm | Severe |
| R4 | Bottom row (ZXCV) | 6.3mm | Severe |
R3 and R4 are hit hardest because the keycaps are at their lowest height, bringing the inner wall closest to the switch housing.
Which Switches Have the Problem?
The severity depends on the switch housing shape:
Switches With Known Interference
- Cherry MX (all variants — Red, Blue, Brown, Black, Speed, Silent)
- Gateron (most standard variants — Yellow, Red, Brown, Black)
- Outemu (most variants)
- Kailh Speed series
- TTC standard variants
Switches With Reduced Interference
Some switches have rounded or modified top housings that reduce the collision:
- Gateron Oil King — rounded top housing helps
- Kailh Box switches — the box housing design is slightly different
- Some long-pole switches — the extended stem can bottom out before the wall collision
- Gateron G Pro 3.0 — slightly modified housing
Switches That Avoid Interference
Very few switches completely eliminate interference with Cherry profile on north-facing boards. The safest approach is to choose a different keycap profile.
How to Fix North-Facing Interference
Solution 1: Choose a Different Profile (Best Solution)
The simplest and most reliable fix — switch to a profile that doesn't interfere:
OEM Profile — feels familiar, closest to stock keyboards:
- OEM Double-Shot PBT Keycap Set - Lavender Purple Gradient ($34.99)
- OEM PBT+PC Dye-Sub Keycap Set - Glacier White ($19.99)
XDA Profile — flat and uniform, shows off designs beautifully:
- XDA Dye-Sub PBT Graffiti Keycap Set - Doodle ($49.99)
- XDA PBT Dye-Sub Keycap Set - Matcha Green ($34.99)
- XDA Dye-Sub PBT Keycap Set - EVA 02 ($34.99)
MDA Profile — sculpted like Cherry but taller, comfortable and interference-free:
- MDA PBT Dye-Sub Keycap Set - Rainbow ($34.99)
- Retro Akko MDA Double-Shot PBT Keycap Set - Panda ($99.99)
Solution 2: Use Switch Washers or O-Rings
Thin silicone or rubber washers placed between the keycap and the switch create a tiny gap that prevents the wall from reaching the housing.
Pros: Cheap, easy to install, lets you keep Cherry profile
Cons: Slightly reduces key travel, changes the bottom-out feel, adds a cushioned feeling
Solution 3: Look for Anti-Interference Cherry Sets
Some manufacturers have modified their Cherry profile molds to reduce wall thickness or change the wall angle, reducing or eliminating interference. Check product descriptions for "north-facing compatible" or "anti-interference" claims.
Solution 4: Rotate Hot-Swap Switches
If your keyboard has a hot-swappable PCB, you can physically pull out each switch and rotate it 180° to south-facing orientation.
Pros: Completely eliminates interference, free
Cons: Only works on hot-swap boards, RGB lighting will shine from the bottom instead of top (less visible through legends)
Do I Need to Worry About This?
If You Have South-Facing Switches
No. All keycap profiles work perfectly. Buy whatever you like — Cherry, OEM, XDA, MDA, SA, anything.
If You Have North-Facing Switches
It depends on your preference:
- Choose OEM, XDA, or MDA if you want zero issues and guaranteed compatibility
- Cherry profile still works — some people don't mind the interference or don't notice it
- Test first if you buy Cherry profile — put it on and press R3/R4 keys; if it feels fine to you, keep it
Many thousands of people happily use Cherry profile on north-facing boards. It's not broken — just not optimal.
Quick Decision Guide
| Your Situation | Recommendation |
|---|---|
| North-facing + want sculpted comfort | MDA profile — sculpted rows, zero interference |
| North-facing + want familiar feel | OEM profile — feels like stock, zero interference |
| North-facing + want flat/clean look | XDA profile — uniform height, zero interference |
| North-facing + must have Cherry | Use washers, or accept minor interference on R3/R4 |
| South-facing + any preference | Cherry profile — the enthusiast standard |
| Not sure which facing | Check your switches first, then decide |
Browse north-facing safe keycaps:
Frequently Asked Questions
What is north-facing switch interference with keycaps?
North-facing switch interference happens when Cherry profile keycaps hit the top housing of a north-facing switch before fully bottoming out. This occurs because Cherry profile keycaps sit very low, and on north-facing switches, the taller side of the switch housing collides with the keycap's inner wall. This creates a mushy feel and altered sound.
Which keycap profiles have interference with north-facing switches?
Only Cherry profile keycaps have interference issues with north-facing switches. OEM, XDA, MDA, SA, and DSA profiles are all tall enough to clear the switch housing. If you have a north-facing keyboard, choose any profile except Cherry, or look for Cherry sets specifically designed to avoid interference.
How do I know if my switches are north-facing or south-facing?
Remove a keycap and look at the switch. If the LED slot or two small pin holes are on the top (toward your monitor), your switches are north-facing. If they're on the bottom (toward you), they're south-facing. Most gaming keyboards use north-facing switches. Most enthusiast boards use south-facing.
Do all north-facing switches cause interference with Cherry keycaps?
Most do, but not all. Switches with rounded or low-profile top housings may have reduced interference. Kailh Box switches and some long-pole switches can also reduce the issue. However, it's safest to assume interference exists unless specifically confirmed otherwise.
How do I fix Cherry profile interference on north-facing switches?
You have several options: (1) Switch to OEM, XDA, or MDA profile keycaps — zero interference guaranteed; (2) Use switch washers or O-rings; (3) Look for Cherry profile sets with anti-interference design; (4) If your keyboard is hot-swappable, rotate the switches to south-facing orientation.
Does north-facing interference damage keycaps or switches?
No, interference does not cause physical damage. It only affects the feel (mushy bottom-out) and sound (different pitch on affected rows). Your keycaps and switches will work fine — the experience is just not optimal.
Why do gaming keyboards use north-facing switches?
North-facing switches position the LED at the top of the switch, which shines through keycap legends more evenly. This makes RGB lighting look brighter and more uniform. Gaming keyboard brands prioritize RGB aesthetics, so they choose north-facing orientation.
Which keyboards have north-facing vs south-facing switches?
North-facing: most Razer, Corsair, Logitech gaming keyboards, Keychron K-series (older models), many budget boards. South-facing: Keychron Q-series, GMMK Pro, Ducky, Leopold, Varmilo, most custom/enthusiast keyboards. Always check your specific model.