Key Rollover Test
Hold real key combos and see how many simultaneous inputs your keyboard reports locally.
Now
0
Keys held
Best
0
Peak combo
Status
Untested
Hold real combos to find the limit.
Hold W + A + Space, Shift combos, or your real shortcut.
Best combo: None yet. Distinct keys touched: 0.
Read result
2-5 keys
Basic rollover. Fine for typing, risky for games or dense shortcuts.
6 keys
Classic 6KRO. Retest over USB before replacing anything.
10+ keys
Likely NKRO behavior when the same result repeats over wired mode.
Fix path
If rollover is the limit
Choose a wired NKRO mechanical keyboard when combo tests prove your current board blocks or drops keys.
As an Amazon Associate I earn from qualifying purchases.
Frequently Asked Questions
What is key rollover? +
Key rollover is how many simultaneous key presses a keyboard can report reliably. 6KRO means about six non-modifier keys at once, while NKRO means each key can report independently when the hardware and connection support it.
How many keys should my keyboard register at once? +
For normal typing, a few keys at once is enough. For gaming, music shortcuts, or complex hotkeys, test the exact combinations you use instead of chasing a maximum number that may not matter.
Why does Bluetooth reduce keyboard rollover? +
Many Bluetooth keyboards use HID modes that limit simultaneous keys to save bandwidth and power. If rollover matters, retest with a wired USB connection or a 2.4 GHz receiver.
Finish with evidence.
Jump back to the live tester, then use repair-first picks only when the result is repeatable.