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Cooler Master SK630 Review – Low isn’t the way to go

Coolermaster SK630 Review

Cooler Master has great products in the MK and CK series, and I had high hopes that the SK630 and the SK series would prove to revolutionize the mechanical keyboard with a great low profile experience.

In reality, the SK630 does deliver on a viable low profile mechanical keyboard, but the typing experience pales in comparison to a full profile keyboard. Interestingly, I found acclimating to this low profile keyboard even harder than a lower profile MacBook keyboard.

The SK series is well designed, with great aesthetics and RGB, if you’re looking for a clean and minimal board that has the durability of a mechanical keyboard this might be for you.

If you’re okay with high profile switches keep moving, the low profile is only slightly lower, the switch is a bit mushy and chalky and the key caps are the standard thin ABS, you can do better for your money.

Check Price of Coolermaster SK630

Cooler Master SK630

An attractive low profile keyboard option for those who are looking for it

See Price on Amazon


  • Gorgeous design
  • Great RGB
  • Detachable USB Type-C connection
  • Decent build quality despite lightness
  • Good travel keyboard with light weight and carrying pouch
  • Plenty of size options
  • Two colour options for key caps


  • Mediocre switch feel
  • Bad stabilizers
  • Thin painted ABS caps
  • Limited key mapping capabilities
  • No adjustable feet

Tech Specs

Cooler Master SK630

  • Width: 35.35 cm
  • Length: 12.55 cm
  • Height: 2.98 cm
  • Case color: Brushed aluminum top, plastic black bottom
  • Weight:  552 grams
  • Keys: 87 TKL size
  • Cable Length: 1.8m, braided, detachable

Keys & switches

  • Switch options: Cherry MX Red Low Profile
  • Keycap material: ABS
  • Keycap legends: Painted & Laser Etched
  • Keycap profile:Flat Chiclet
  • Media keys: Through fn layer
  • Backlight: Full RGB
  • Software: Coolermaster Portal
  • Polling rate: 1000 hz
  • Connectivity: USB type-c device, USB-A to host, no pass through


YouTube video

The switches are the most intriguing thing about this keyboard and deserves to be talked about first. The SK series (SK621, SK630 and SK650) all feature the new low profile Cherry MX Red switch, these switches drop the actuation point of the switch down to 1.2 mm from the standard 2 mm of regular MX switch and the total travel down to 3.2 mm from a standard 4 mm.They do the job of making a lower-profile mechanical keyboard, but do they feel good?

Coolermaster SK630 - Height comparison

The low profile MX reds aren’t as good as its regular profile variant, the low profile MX reds are rated at 45 grams of operating force, I find that the actuation action a little scratchy and mushy. That friction make the low profile MX reds feel a little more taxing to use than the regular profile MX Reds. Perhaps its the same amount of force required in a smaller actuation and travel window that make these feel a lot stiffer than the pull profile variant.

Coolermaster SK630 - Low Profile Red Switches

The stabilizers in this keyboard are sub-par with the space bar and shift keys rattling quite a lot under normal use. The wire stabilizers are a pain in the butt to attach to the low profile key caps and don’t do much in the way of reducing chatter.

The keyboard PCB has a 1000 Hz polling rate with N-key rollover, so no input performance concerns with the SK630.


Coolermaster SK630 - Keycap

These keycaps are sure to be divisive, let’s get the obvious stuff out of the way first, the quality of these caps are abysmal, thin painted ABS keycaps with a laser etched legend is still all too common on these keyboards.

Coolermaster SK630 - Keycap underside

The key caps themselves are completely flat with no difference in feeling from the top row to the bottom, I’m personally finding it difficult locating a key by feel and end up mistyping or misinputing in games often and that feeling didn’t really subside over time. Initially, I didn’t think this would be a huge problem, I type on Macbook keyboards all the time without issue, the keycap surface area is smaller than the latest MacBook scissor switches.

sk630 rgb

The font on the keyboard is good, Cooler Master has done a good job with the legends with a nice standard looking font that allows for good shine through and legibility on the cap.

The SK630 comes with a wire key cap puller to help with removing the key caps, but there aren’t a ton of low profile after market cap options so I’m not sure how handy a puller is in this scenario just yet.

Build Quality & Design

Cooler Master is coming with a plethora of options for its low profile SK series, you can get this keyboard in 3 sizes:

  • SK650 – Full size
  • SK630 – TKL
  • SK621 – 60% with bottom right arrow cluster and 1U right shift

On top of the size options, you can also opt to choose the white key cap version of any of the SK series boards. Notably, the SK621 has bluetooth capability, further improving the SK series portability as a travel keyboard.

We’re reviewing the SK630, but all of our comments apply to the other sizes.

Coolermaster SK630

The Cooler Master SK630 is an attractive keyboard, it’s minimal, clean and angular. The font is attractive, the RGB looks great and the branding is very minimal with the function keycap featuring a restrained Cooler Master brand mark.

Coolermaster SK630 -Brushed Aluminum

The top of the keyboard is comprised of a brushed aluminum top, with a chamfered edged all the way around, the bottom half of the keyboard is a standard ABS plastic case with a singular Cooler Master logo in the middle.

Coolermaster SK630 - Type C connection

I’m glad to see USB -type C connectivity on the keyboard, the cable itself is a standard braided USB cable, nothing remarkable here.

Coolermaster SK630 - Back

On the bottom of the case, there are only 4 rubber pads, no feet to change the angle of the keyboard.

Coolermaster SK630 - Side height

The default angle of the keyboard is quite low, so if you do end up getting this keyboard, be sure that you prefer a low angle and low profile typing experience, for me, this wasn’t it.

Coolermaster SK630 - Low Profile RGB

The keyboard is light, it’s an easy travel keyboard to carry around due to its slimmer profile and lighter weight, the carrying pouch that Cooler Master can only mean that they intended for this keyboard to be a travel board.

The flex and creaking on the SK630 is still pretty minimal, it’s a solidly made keyboard which is no surprise coming from Cooler Master.

Features & Software

The Cooler Master SK630 is fully customizable with Cooler Master Portal, download the latest version here: https://www.coolermaster.com/downloads/


Cooler Master Portal - RGB Screen

The Portal software is pretty run of the mill, the first screen is the LED/RGB screen where you can set the RGB mode of the SK630. Available RGB modes:

  • Static
  • Rainbow Wave
  • Crosshair
  • Reactive Fade
  • Custom
  • Stars
  • Rain
  • Color Cycle
  • Breathing
  • Ripple
  • Multi-Layer
  • Multi-Zone
  • System Status
  • Snowing
  • Reactive Punch
  • Heartbeat
  • Fireball
  • Circle Spectrum
  • Reactive Tornado
  • Water Ripple
  • Snake

Each of these modes allow you to choose direction of the effect and the colour.

YouTube video


Cooler Master Portal - Macro Screen

Pretty standard, here you can create macros, record your combination of key presses, with appropriate delays and assign to a key. You can choose to have the macro run once, hold to run or toggle on and off to run.

Key map

Cooler Master Portal - Keymap Screen

Portal is below average here, the key mapper only allows you to map to another key press, so no system level functions here like opening software. The SK630 only has 1 layer of keys to work with, you’re pretty limited as to what you can customize on this keyboard.


Cooler Master Portal - Profile Screen

The SK630 allows for up to 4 on board profiles.

The SK630 is able to access most of these settings without software, you can record macros, change profiles and adjust RGB settings on the keyboard itself, check out the manual here: http://us.coolermaster.com/xresserver01-DLFILE-en1901100001e0d6-F19050300013e34.html

Warranty and Reliability

Cooler Master has a 2 year warranty on the SK630 according to their product page.

Value & Conclusion

The Sk630 delivers what it promises, a low profile mechanical keyboard experience, so if that’s what you’re looking for a prioritize that over key feel I’d get the SK630, it’s the best low profile keyboard on the market.

For every one else, I don’t think venturing into a low profile world is worth it, you give up too much tactility and typing experience for it. This is a downgrade for switch smoothness and feel, and if you’re not absolutely looking for it, you can find much better keyboards for less money than the SK series.

Check Price of Coolermaster SK630

Cooler Master SK630

An attractive low profile keyboard option for those who are looking for it

See Price on Amazon
Picture of Raymond Sam

Raymond Sam

Raymond is the founder and editor TheGamingSetup.com. He's has reviewed hundreds of mice, keyboards, controllers and other gaming peripherals over the last decade. He's been gaming for even longer, playing all kinds of games on all systems with a several thousand hours of DOTA 2, Starcraft , Street Fighter, Smash Bros, Overwatch, Apex Legends and Call of Duty under his belt with the intention of adding several more thousand going forward.

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One Response

  1. These boards are really nice, it’s the flat keycaps that kill them.

    In fact, I was pretty sure these boards were coming with the updated key profiles to replace the flat ones, as my SK630 arrived with them, but then I later got its big brother the 650 and it was all flat.
    At the time, CM were offering a free replacement keycap set to update your unit, so I got a little lucky with the timing, but now, even though they’ve ended the free upgrade, you can still swap those horrid pancake keys for a normal-feeling PBT cap for $20. While you’re at it, lube the stabilizers and switch stems, and these boards really do shine. If you get one of these and it has the flat keycaps, invest in the replacement keycap set; it definitely breathes new life into these.

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