Epomaker Luma40 vs RT8540% or 75% layout
Choose the Luma40 for a compact ortholinear aluminum board with QMK and VIA support, or the RT85 for a more conventional 75% layout with a screen and joystick.
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5.0 · 3 reviews
from$92at Epomaker
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4.8 · 37 reviews
from$68at Epomaker
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Which one should you get?
Get the
Epomaker Luma40
Build quality in the top 15% of 40% boards under $150.
- CNC aluminum case and polycarbonate plate.
- 40% ortholinear, low-profile layout with a 410g listed weight.
- Supports both QMK and VIA, alongside hot-swappable Kailh low-profile switches.
- Low-profile switches and keycaps only. Standard MX keycaps will not fit.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
- Compact layout only. No function row, dedicated arrow keys, or numpad.
Get the
Epomaker RT85
Battery
Build quality in the top 50% of 75% boards under $100.
- 75% ANSI layout with a TFT screen and programmable joystick.
- 8000mAh battery, with vendor-listed battery life up to 320 hours with RGB and screen off.
- Gasket mount with a flex-cut polycarbonate plate and five sound-dampening layers.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
- No numpad.
Pick the Luma40 if you specifically want an ortholinear low-profile board, a light travel setup, or QMK/VIA remapping, and are comfortable adapting to its compact layout. Choose the RT85 if you want a conventional 75% arrangement with a screen, joystick, larger battery, and more switch choices. Both provide tri-mode connectivity and hot-swapping, so the layout and feature set should decide the purchase.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
Epomaker Luma40
Epomaker RT85
Layout size
40%
75%
Battery
1,450 mAh
8,000 mAh
A larger battery means fewer cables during the day
Low profile
Yes
No
Ergonomics
Ortholinear
Standard
Case material
Aluminum
Plastic
- Epomaker Luma40
- Epomaker RT85
- Performance
- 7474
- Build quality
- 8166
- Productivity
- 8876
- Customizability
- 8566
- Portability
- 8591
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Max polling rate: 1,000 Hz
- Sound dampening
- Plate material: Polycarbonate
What will you mostly use it for?
The RT85 is the more practical choice for office use and content creation, particularly if silent switch options or a built-in screen and joystick appeal. The Luma40 has the edge for travel and programming, with its smaller, lighter build and explicit QMK/VIA support. Gaming is a close call because both list the same polling rate and N-Key Rollover, but their layouts differ substantially. For modding, the Luma40 provides more clearly stated firmware options, while both are hot-swappable.
It's a tie
- Both list a 1000 Hz polling rate in wired and 2.4 GHz modes.
- The RT85 has a 75% layout, joystick, and TFT screen; the Luma40 is a 40% ortholinear board with no dedicated arrow keys.
- Both support N-Key Rollover and hot-swappable switches.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Epomaker Luma40
3 owner reviews
“Hello there the luma 40 is one of my favorite keebs i used i can bring it anywhere with me i really love it thanks u guys”
Epomaker RT85
37 owner reviews
“My all time favorite keyboard -- awesome aesthetics, great functionality, types like a dream, and brings just the right amount of fun and whimsy to my new setup.”
Epomaker Luma40 vs RT85 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
14 of 24 specs differ
Epomaker Luma40
Epomaker RT85
Switch options
Hot-swappable
Mount style
Low profile
Sound dampening
Layout size
Layout standard
Ergonomics
Display
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
Compare prices
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Epomaker Luma40 vs RT85: your questions
The Luma40 is lighter at 410g and measures 21 x 240 x 87 mm. The RT85 weighs 1000g and measures 40 x 360 x 138 mm, so the Luma40 is the more compact option.
Yes, the Luma40 lists both QMK and VIA support. Epomaker says VIA can be used for macros, remaps, and layouts.
The RT85 listing describes programmable software and says it supports EPOMAKER 3.0 software on Windows and Mac. It does not list QMK or VIA support.
The Luma40 is a 40% ortholinear ANSI keyboard, while the RT85 is a 75% ANSI keyboard. The Luma40 has no function row, dedicated arrow keys, or numpad, while the RT85's compatibility notes specify that it has no numpad.
Both list Bluetooth, 2.4 GHz wireless, and wired connectivity. The Luma40 vendor description identifies Bluetooth, 2.4 GHz, and cable modes, and the RT85 description lists Bluetooth, 2.4 GHz, and USB-C.
The RT85 has an 8000mAh battery, compared with 1450mAh in the Luma40. Epomaker lists up to 320 hours for the RT85 with RGB and screen off, and up to 75 hours for the Luma40 with RGB off.
No. The Luma40's compatibility notes specify low-profile switches and keycaps only, and say standard MX keycaps will not fit.
The Luma40 has north-facing LEDs, and its compatibility notes warn that Cherry-profile keycaps can hit the switch housing. Its listed keycaps are low-profile.
Yes, both are listed as hot-swappable. The Luma40 uses Kailh low-profile mechanical switches, while the RT85 supports 5-pin mechanical switches.
Yes, the RT85's 1.47-inch TFT screen supports a media page for custom pictures or GIFs, according to its product description. The vendor also lists status information such as connection mode and battery percentage.
The RT85 joystick adjusts volume up and down, toggles RGB effects left and right, and mutes when pressed. The joystick is a listed built-in feature.
Both list 1000 Hz in wired and 2.4 GHz modes, and 125 Hz in Bluetooth mode in their vendor specifications. Their layouts and other features differ, but the stated polling rates match.
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