In this review we’re looking at the Genesis Thor 420 RGB, a slim mechanical keyboard with Content-branded switches. What sets this keyboard apart from others we’ve looked at is a laser focus on gaming. Many keyboards brand themselves as “gaming”, but Genesis have engineered the Thor 420 RGB specifically for blazing fast response. There’s also a host of gaming-specific features – read on for details.

Gensis Thor 420 RGB Specifications & Features

Switch Brand Content
Switch Type Content Slim Blue
Switch Characteristics Tactile, Clicky, Short Travel
Actuation Point 1.2mm
Maximum Key Travel 2.5mm
Actuation Force 45g
Switch Lifetime 50 Million Actuations
Key Count 104
Media Keys 12
Layout US Only
Interface Wired (USB 2.0 Type A)
Cable Length 1.65m
OS Support (hardware) Windows XP or newer, Android, Linux
OS Support (software) Windows XP or newer
Rollover N-Key
Dimensions (mm) 418x113x24
Weight 573g
Backlight Addressable RGB
Accessories Cable management strap


On top of the specs, the Genesis Thor 420 RGB has several special features;

  • Fast response time with 1000Hz polling rate
  • Windows key lock
  • WASD and arrow keys swap with FN+W
  • Five backlight presets for popular games and genres

Genesis Thor 420 RGB Closer Look


Unboxing the Genesis Thor 420 RGB, we find an appropriately sized box and a well protected keyboard. We do prefer recyclable packaging here at Play3r, so we do have to gripe a little. Not only are the foam blocks not recyclable, the plastic bag lacks a recycling mark. Nonetheless, the sizing is reasonable.

The keyboard comes with a small booklet with operating instructions in English, Polish, Czech, Slovak, German, Romanian, Russian and Bulgarian – you can tell Genesis are based in Poland. Otherwise, the only accessory is a cable management strap for the USB cable.

Genesis Thor 420 RGB manual. This is mostly fluff and RGB instructions which I'm assuming you're not bothered with if you're using a screenreader. We'll go over the functions in the rest of the review.

The manual covers software installation, RGB controls and the ability to swap WASD with the arrow keys using FN+W. There’s also some general housekeeping like safety information.

Visual Inspection

Genesis have topped the Thor 420 RGB in brushed aluminium, dyed to a gunmetal grey finish. A bevelled edge has a bright mirror finish. It’s a striking look, further accentuated by the visible torx head screws that hold it all together. Personally I love this – it’s nice to see metal being unapologetically bright and shiny, rather than trying to be understated. Underneath there are six round rubber feet, and a couple of basic plastic legs.

This is a very slim keyboard – a feature Genesis are enthusiastic to highlight. Even flipping the legs up doesn’t add much height. The slim profile makes the keyboard very comfortable for long gaming sessions.

The LEDs are very bright with distinct colours, and shine clearly through the keys. However, the transitions are bit… off. I can’t put my finger on it but it feels like rather than a constant colour change, the LEDs fade between fixed colours quite quickly. They’re clearly capable of producing intermediate colours, but don’t dwell on them for long.

The windows key lock function is activated by pressing FN plus the windows key. This renders the windows key inactive, keeping it from interrupting a game. A slight nitpick is that subsequently unlocking it also presses the windows key – great if you wanted the start menu, not so great if you wanted a shortcut. One good point is that Genesis have thoughtfully included a “win lock” LED in the top right as a reminder.

There are five prebaked game modes. All are easily accessible, with FN plus a number 1-5. These light up certain keys in red, and turn off the rest of the backlighting to minimise distractions.


I personally spend more time typing than gaming, and am a very heavy typist. I’m going to be honest and say that for me, typing with this keyboard is not a fun experience. With wide flat keycaps it’s very very easy to brush against an adjacent key. The sensitive switches mean that this light brush is usually turned into a keystroke. On top of this, the only available layout is US – a little jarring and inconvenient as a Brit.

The thing is, this is not a typing keyboard. This is a gaming keyboard. So naturally I have to test it properly – by playing some games. You know, for work.

I’m pleased to report that for gaming, the experience is far better. The lightness and responsiveness of the Content slim blue switches is suddenly a huge plus. In particular I’d call out wingsuiting in Just Cause 3 – a game I have nearly 800 hours in – as something that I personally found to benefit massively. Not only do the ultra-fast switches let me make delicate adjustments with ease, but thanks to short travel even my lead fingers turn into a light touch. Vehicle driving would also benefit. Outright racing games are usually considered better with a controller, but vehicle use in other games is common and tends to happen with a keyboard.

Genesis describe the switches as “giving you an unfair advantage over your competition”, and I had initially intended to refute that. After all, a keyboard is not a replacement for skill. However after using it I can honestly say it really does genuinely help in some situations. Overall, the Genesis Thor 420 RGB has serious gaming credentials. If you’re a lighter, more precise typist than I then you might absolutely love it.

Genesis Thor 420 RGB Software

The software for the Genesis Thor 420 RGB has two tabs – “PCMODE” and “SETTINGS”. The “PCMODE” tab has most of the options greyed out. The only options are profile management, and backlight settings. Moving to the “SETTINGS” tab, an individual key can be selected to unlock the rest of the options.

We have fairly powerful set of macro options here in the “SETTINGS” tab. The recording interface is a little clunky, but does the job well. By default, the delay that your human actions had is recorded. Macros can then be edited, with actions inserted or deleted and delays edited either per action or blanket. In addition, we tested if macros work without the software running. Having closed the software and manually killed the low level service (THOR 420HID.exe), our test macro kept working. However, after unplugging the keyboard and plugging it back in again the setting is lost. This is a good balance of behaviour that avoids a user thinking they “broke” their keyboard because a macro or key reassignment stuck.

When we first got this keyboard a couple of weeks ago, the only backlight options were prebaked effects. Correlation is not causation, but we queried this with Genesis and as we were finishing this review a software and firmware update was posted that adds proper backlight customisation. The Customize setting has “Background” mode, which sets the entire backlight, or alternatively there’s “Single Key” mode which allows colours to be set up per key.

The colour picker is a little fiddly and would really benefit from a few presets, but it does the job. Colour reproduction seems off but manually finetuning the R, G and B values helps a lot. For example, clicking on orange on the colour picker yielded 253/127/6, which came out more like peach. Manually setting 255/127/0 gave us a good orange.

Overall, the software is a little clunky but does everything it needs to do now Genesis have added backlight customisation.

The Genesis Thor 420 RGB Review: The Verdict

Going into this review, I was sceptical about this keyboard. I didn’t doubt the claims of responsiveness, but I did doubt that it would matter. I’m pleased to report that I was wrong.

In some games, having the light and responsive switches can make a huge difference. Tasks that were previously frustrating due to a lack of fine control became far more achievable. On the flip side, sensitive switches are unforgiving towards heavy and inaccurate typing. The slim profile also makes long gaming sessions comfortable, without needing a wrist rest.

What’s hot:

  • Slim design
  • Very responsive switches
  • Makes fine control much easier in some games
  • Comfortable even for long sessions

What’s not:

  • Non-slip feet could be better
  • US layout only
  • Switches this responsive aren’t for everyone

As a gaming keyboard, the Genesis Thor 420 RGB excels. For typing, it depends if you’re a light typist and comfortable with the US layout. To review the Genesis Thor 420 RGB though we are judging it against the pitch, and the pitch is gaming. Though there are one or two minor grumbles, for the overall performance and comfort it easily earns the Play3r Gold Award.

awards-goldAt time of writing it’s hard to find the Thor 420 in the UK, but Irish retailer Maxbitt has it in stock for £60.42.

Thanks to Genesis for sending a sample of the Thor 420 RGB in for review.

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genesis-thor-420-rgb-slim-mechanical-keyboard-review-fastAs a gaming keyboard, the Genesis Thor 420 RGB excels. The ultra-responsive Slim Blue switches from Content really do make a noticeable difference. Unfortunately we didn't find it ideal for typing.

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