Lens + MCU

Two parts in one page set: the Lens (tiny) + the MCU (the brain).

Part A: The Lens

Lens: small clear plastic piece between the sensor and your mousepad. It focuses light so the sensor's camera gets a SHARP picture.

~ like: glasses for the sensor's eye. Perfect eye + dirty glasses = still blurry.

Part B: The MCU (microcontroller) = the Brain

• Story: the sensor is the EYE, it sees movement. But the eye doesn't decide anything.
• The MCU is the BRAIN: it collects what the eye sees + what your fingers click, packs it into a message and sends it to your PC.
• A great eye with a slow brain still reacts late.

How the signal travels:

What the MCU does (its 4 jobs):

Slow or badly tuned MCU = report timing gets inconsistent = mouse feels 'off'.

Polling Rate (the MCU's biggest job)

Polling rate: how many times per second the mouse reports to the PC. 1000Hz = every 1ms, 8000Hz = every 0.125ms.

~ like: a friend texting you live cricket scores. 1000Hz = 1 text every ms, 8000Hz = 8 texts every ms. Smoother updates, but your friend (MCU) works MUCH harder + uses more battery.

Battery cost (rough idea, not exact numbers):

-> higher polling = battery drains faster - check battery life claims at 1K AND at 4K/8K before you buy, not just the headline number.

Who makes MCUs?

No official count, but these are the names you'll actually see in mice:

Nordic	premium wireless
CompX / Beken	budget wireless
STM32	wired mice
Nuvoton	wired 8K
PixArt wireless	some 8K receivers
Logitech / Razer	own systems

• Nordic (Norway): the 'PixArt of MCUs'. Nordic says its nRF52 chips are the world's most sold Bluetooth LE devices.
• CompX / Beken (China): budget + mid wireless. Some brands advertise a 'Beken CompX' platform up to 4000Hz with a 4K receiver.

  e.g. Endgame Gear XM2we (budget wireless) = CompX CX52850.

• STM32 (STMicroelectronics): common in WIRED mice.

  e.g. Endgame Gear OP1 (wired) = STM ARM Cortex-M4, 1000Hz.

• Nuvoton: high-speed USB chips for WIRED 8K mice.

  e.g. Endgame Gear OP1 8k / XM2 8k (Nuvoton M438) + the 8k v2 models.

• PixArt wireless: yes, the sensor company too!

  e.g. Ninjutso Sora V3 uses a 'SnappyFire x PixArt 8K' receiver.

• Logitech / Razer: LIGHTSPEED / HyperSpeed - own systems, chip usually not advertised.

~ like: sensor world again: Nordic = PixArt (sells to everyone), CompX = budget tier, Logitech/Razer = closed systems like HERO.

How Nordic names its chips

e.g. nRF54L15:

nRF	→	Nordic radio (RF) chip
52 / 54	→	series = generation (54 is newer)
L / H	→	family inside the 54 series
40 / 15	→	member inside the family

!! Nordic doesn't publish a simple naming guide - this is the easy way to read it.

nRF52 family (older generation):

1. nRF52840 - most advanced member (the big one)
2. nRF52833 - smaller member
3. nRF52820 - smaller, often a helper chip

e.g. Glorious Model O Wireless = nRF52840 + nRF52820. QPAD DX900 = nRF52840 + nRF52833.

nRF54 family (new generation):

1. nRF54H20 - most powerful, dual processor (not seen in mice yet)
2. nRF54L15 - most capable 'L' chip
3. nRF54L10 / nRF54L05 - smaller L members

What improved: nRF52840 -> nRF54L15

64 MHz	→	128 MHz	2x processing power, less power used
55nm	→	22nm	first Nordic series on 22nm
old radio	→	4 Mbps option	faster 2.4GHz = helps 8K polling
Flash memory	→	RRAM	new memory type

Nordic also claims 3x processing efficiency.

Why smaller 'nm' is better:

~ like: same size classroom, but smaller desks -> more students fit + the room uses less electricity.

The MCU Ladder (+ mice that use them)

1. Nordic nRF54L15 / 54L - next-gen
2. Nordic nRF52840 - industry workhorse
3. CompX CX52850 - budget wireless

• Nordic 54L: G-Wolves Warg 8K, Lycan 8K, VUK Medium, HTX Mini Asym, HTS Plus Pro, FEN MAX Asym + EWEADN Z7.
• Nordic nRF52840: G-Wolves Hati ACE, Glorious Model O Wireless, WLMouse Strider + Beast X, VGN/VXE MAD R Major, Akko Pulse 01 (with 52820).
• CompX CX52850: Endgame Gear XM2we - steady 1000Hz with a PAW3370.
• Not disclosed: Logitech (LIGHTSPEED), Razer (HyperSpeed).

Story: one brand shows the whole upgrade path

Hati ACE (2022)	nRF52840
Warg / Lycan / VUK	PAW3955 + Nordic 54L

G-Wolves picked the 52840 for "power consumption, CPU performance + stability".

G-Wolves in 2022 -> nRF52840. G-Wolves today -> newest sensor (PAW3955) + newest chip (54L) + ~21-30g mice - worth knowing if you're comparing G-Wolves generations.

Wired MCU vs Wireless MCU

• Wired = no radio + no battery, but the MCU still reads sensor + clicks and talks to the PC over USB.
• Always connected -> no power saving -> full speed all the time.

What each type needs most:

WIRED MCU	fast USB connection, no radio, no battery care
WIRELESS MCU	built-in 2.4GHz radio, very power efficient

Why wired 8K needs a 'high-speed USB' chip:

~ like: a 1-lane road vs a 4-lane highway - more lanes = more cars (reports) per second.

Wired vs wireless chip match (rough):

STM ARM Cortex-M4	↔	Nordic nRF52840	same Cortex-M4 core family
Nuvoton M438	↔	Nordic nRF54L15	both built for 8K

wired: Endgame Gear OP1 (1000Hz) | wireless: G-Wolves Hati ACE, Glorious Model O Wireless

wired: Endgame Gear OP1 8k / XM2 8k | wireless: G-Wolves Warg / Lycan / VUK

!! Rough match by job + era, not an exact equal - wired + wireless chips do different work.

Dual-chip trick:

e.g. Akko Pulse 01: nRF52840 + nRF52820 for 8K

~ like: a restaurant with a chef AND a waiter, instead of one person cooking + serving.

What about Logitech + Razer?

LIGHTSPEED	Logitech wireless
HyperSpeed	Razer wireless

(chip usually not advertised)

They market the wireless system under their own name and usually don't say which chip is inside. So judge these mice by hands-on reviews and testing, not by which chip is inside.

MCU checks before you buy

• Check 1: Does the brand name the MCU? Transparency is a good sign (Nordic = gold standard for 2.4GHz).
• Check 2: Battery life at 1K vs 4K/8K - 8K drains much faster.
• Check 3: Can motion sync be turned on/off? Some pros prefer OFF at 8K.
• Check 4: Does 8K need a special dongle? (e.g. WLMouse Strider needs its 8K dongle)
• Check 5: Wired mouse? Check if it says which USB MCU (STM32 / Nuvoton) + real 8K support.