Keychron K3 Ultra vs K3 V28K Polling vs Proven Value
Choose the K3 Ultra if you need cutting-edge 8K wireless performance and PBT keycaps; pick the K3 V2 for a proven, affordable low-profile design with optical switches.
4.8 · 2,258 reviews
from$84at Keychron
Down 18% this monthDown 18% this month
Which one should you get?
Get the
Keychron K3 Ultra
8K Polling
- 8K polling in wireless and wired modes for top-tier gaming responsiveness
- Double-shot PBT keycaps resist shine and fading over time
- ZMK firmware with Launcher web app for deep remapping and macros
- No dedicated palm rest or travel pouch included in the box
- Optical switch compatibility is not specified; the vendor states Keychron Milk POM switches only
- Heavier at 566 g compared to the K3 V2
Get the
Keychron K3 V2
Proven Value
- Proven low-profile optical switch design with MX-styled stems
- Available in many layout standards including JIS and multiple ISO variants
- Includes extra keycaps and a dust cover in the package
- ABS keycaps are more prone to shine over time compared to PBT
- Limited to 1000 Hz polling, no 2.4 GHz connectivity
- Battery life up to 34 hours is significantly shorter than the K3 Ultra
For gamers, programmers, and anyone who values low latency and extensive customization, the Keychron K3 Ultra is the clear choice with its 8K polling and ZMK firmware. If your priority is a proven, affordable low-profile keyboard with optical hot-swappable switches and you do not need cutting-edge wireless performance, the K3 V2 remains a solid value. Both keyboards are well-suited for travel, but the K3 Ultra offers a more future-proof feature set.
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.
Keychron K3 Ultra
Keychron K3 V2
Connection
Bluetooth, 2.4 GHz, Wired
Bluetooth, Wired
Battery
2,600 mAh
1,550 mAh
Case material
ABS, Wood
Aluminum, Plastic
Mount style
Plate Mount
Tray Mount
QMK
Yes
No
- Keychron K3 Ultra
- Keychron K3 V2
- Performance
- 8662
- Build quality
- 7666
- Productivity
- 8965
- Customizability
- 8666
- Portability
- 8277
- Layout size: 75%
- Hot-swappable
- Low profile
- Switch options: Clicky, Linear, Tactile
What will you mostly use it for?
The K3 Ultra wins in five of six categories thanks to its superior 8K polling, premium PBT keycaps, and extensive foam dampening. For gaming, its 2.4 GHz and 8K polling provide a clear latency advantage. Office and content creation users benefit from longer battery life and quieter keystrokes. Programmers and modders gain from ZMK firmware and multiple foam layers. Travel is a tie because both are similarly slim and portable, though the K3 V2 has a dedicated travel pouch.
Pick the Keychron K3 Ultra
- 8K polling rate in 2.4 GHz and wired modes for lower latency
- Includes 2.4 GHz connectivity for ultra-low-latency wireless gaming
- Powerful ARM MCU with 1 MB flash provides more flexibility for performance
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Keychron K3 Ultra
6 owner reviews
“I bought this keyboard to test for work. I love how sturdy it feels, the wood aspects make it feel premium as well. I opted for the banana switches, they do not disturb my colleagues and it feels great for everyday tasks. The battery also seems to hold out…”
“Meh. I dont like the wood grain and they make it difficult to return or exchange”
Keychron K3 V2
2,258 owner reviews
“I had a full-size mechanical keyboard before that was tking too much of deskspace. This keyboard with it's 65% size is amazing and saves quite some desk space.”
“Non-rgb version feels nice, but the battery is killing the whole experience... Even with the lights turned off, i can't get the keyboard to work on battery longer than 3-4 days, which is super annoying and not making me trust into this brand. Especially if…”
Keychron K3 Ultra vs K3 V2 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
11 of 22 specs differ
Keychron K3 Ultra
Keychron K3 V2
Switch options
Hot-swappable
Mount style
Low profile
Sound dampening
Layout size
Layout standard
Ergonomics
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Backlight
QMK
VIA
Mac & Windows
Released
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
Lowest price across stores, Amazon excluded.
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Keychron K3 Ultra vs K3 V2: your questions
Yes, according to the vendor description, the K3 Ultra supports an 8K polling rate in both 2.4 GHz and wired modes out of the box. The polling rate can also be set to 2000 Hz or 1000 Hz if desired.
No, the K3 V2 uses low-profile Keychron Optical switches that are not compatible with conventional MX-style mechanical switches. The vendor specifically notes that the optical switch version is not compatible with any standard MX switch.
The K3 Ultra offers up to 550 hours of use on a single charge with the backlight off, as stated by the vendor. The K3 V2 provides up to 34 hours with the backlight at the lowest brightness setting.
The K3 Ultra features double-shot PBT keycaps, which are more resistant to oil and fading over time. The K3 V2 uses ABS keycaps, which are more likely to develop a shiny surface with extended use.
No, the vendor product description does not include a palm rest in the box contents for the K3 Ultra. The K3 V2 lists a palm rest as an optional add-on accessory.
Yes, the vendor states that the K3 V2 includes keycaps for both macOS and Windows, and is compatible with both operating systems. It also has a dedicated Linux user group for support.
The K3 Ultra is powered by open-source ZMK firmware, and the vendor describes a Keychron Launcher web app for remapping keys, creating macros, and adjusting backlight settings.
The vendor description mentions 18 types of RGB backlight settings and a static white option, but does not explicitly state per-key RGB. It describes a floating keycap design and adjustable 4-level backlit.
The K3 Ultra weighs 566 g according to its specifications. The exact weight of the K3 V2 is not provided, but the vendor describes it as one of the thinnest and lightweight wireless mechanical keyboards. Both are slim low-profile designs suitable for travel.
Yes, the hot-swappable version of the K3 V2 uses low-profile Keychron Optical switches that can be swapped without soldering. The vendor notes that hot-swapping is available only for the optical switch version.
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