Mionix Castor Review

Whenever PC gamers go on to purchase a gaming mouse, brands that would typically come to mind are known manufacturers such as Corsair, Logitech, and Razer however Mionix are now starting to speed into the spotlight as one of the top gaming peripheral brands. Mionix is a Sweden-based maker known for creating quality computer peripherals over the last few years.

Creating a different standard in comfort and PC gaming performance, Mionix brought in the Castor Gaming Mouse. It’s the latest entry from their long line of quality gaming mice. Named after one of the brightest stars in the universe, the mouse is equipped with several buttons.

Its multi-colored optical is intended for gamers who are right-handed. It comes with ring and pinky finger grooves, improved rubber grip, and other well-worthy features that make this a mouse a worthy discovery.

The manufacturer believes its revamped design can cater to varying forms of grip whether it’s a palm-type grip or a claw-on grip. The Castor is a mouse on its own with a unique ergonomic shape. A user wouldn’t immediately confuse it with another gaming mouse. But its similarity with another gaming mouse may be apparent once a user’s hands is felt on the Castor’s smooth body frame.

Mionix Castor Review – What’s in the Box?

Contents of the package mouse include:

  • 1x Mionix Castor gaming mouse
  • 1x Sticker set
  • 1x Quick start guide

The Product

The Mionix Castor – Sleek… Comfortable… Brilliant

The Castor is gaming mouse armed with six buttons: situated on the right, left, and middle. Two thumb buttons can be found and a DPI switcher can be seen on the rear portion of the scroll wheel. Sporting an awesome looking Shark Fin colour the mouse really does look like a stylish beast.

Its shape is intended for right-hand use and has some similarities with some known gaming mice models which isn’t a bad thing at all. This shows that Mionix a clearly looking at what works for people and adapting it to their product range. The only difference is, it has a smaller body.  It’s an all-around peripheral device with a smaller side for palm gripping and big enough for claw gripping. Nevertheless, the Castor is capable of accommodating both.

The Castor possesses the smooth and soft coating that many would expect from Mionix. The soft texture makes for added grip. It’s a well-designed mouse consisting of a braided fabric cable, scroll wheel lighting, logo, and rubber coating (under the thumb).

When it comes to product design this is where Mionix starts to scream ahead of the pack and the Castor happens to be one of the best designs out there. It has beautiful lighting, it’s really comfortable, and its layout button makes complete sense.

The Mionix Castor comes with a pre-installed 128kb memory. That means all recorded macros and profiles are loaded when the mouse is brought aboard. It’s powered with a 32-bit AMR processor with an engine running at 32MHz to ensure a problematic-free operation and swift game changes. The sensor of the mouse is PMW: a 3310 gaming grade IR-LED optical sensor. It’s capable of rocking a maximum of 10,000 DPI. To top off its astounding build, it comes with an adjusting lift-off distance.

With over 16 million color options, the palm rest logo and scroll wheel can glow a perfect shade of color a gamer would hope for. The Castor can be displayed in a number of ways whether it’s in the form of blinks or frequent pulsations.

In terms of composition, the mouse is impressive. It weighs only 93.8g, which puts it in the mid-range weight that any computer gamer would want.

Using It

Setting up the Castor is straightforward. It’s a plug-and-play device. Once the mouse is plugged into a user’s desktop, it’s ready for use. Keep in mind that changing the DPI, lighting options, and other setting configurations requires downloading its official software.

Mionix decided to make a smaller- than-usual shell with the Castor, making it ideal for those with small or medium-sized hands and those who favor a claw-type grip. Utilizing the mouse with a palm-type grip was surprisingly comfortable. But that level of comfort will be dictated by the size of a user’s hands.

As expected from the manufacturer, the button layout is a perfect ten. Placement of the sensor is just right since it’s placed in the middle. That means not exaggerating movement when a user’s wrist is articulated.

When it comes to weight, it retains a 50-50 distribution, making it feel ideally balance in the mid-air. Its center of gravity could’ve been pushed forward a bit to make it ideal for users who like the palm-type grip. This is where the center of gravity is favored between the pinky finger and thumb.

Tracking is solid on any standard mouse pad.

Even if the user won’t utilize the sensor to its complete potential, it’s been found that having a higher DPI and lowered sensitivity can lead to more accuracy over settling for high sensitivity on an ordinary mouse.  Polling rates were fantastic as it can manipulated and set automatically at 1000Hz. Both features tend to be a big help in competitive FPS environments like that of COD and CS:GO, where swift reflexes and quick thinking are must-haves.

The Castor can be calibrated to a surface via the Surface Quality Analyzer Tool and auto-detected lift-off distance can be manipulated according to personal preference and type of surface. Bundled with a 32-bit ARM processor as well as 128kb on-board memory, it’s able to do mouse and gaming tasks while keeping in mind a user’s mouse lighting configuration. It’s capable of handling up to 5 profiles and other configurations.

The mouse was tested on games like StarCraft II: Heart of the Swarm, Titanfall, Star Wars: The Old Republic, and Batham: Arkham Knight. Once the profiles were correctly configured, each game functioned reasonably well. The Castor is capable of handling any PC game regardless of genre. It functioned perfectly for game titles that has no need for additional buttons.

For instance, the Heart of the Swarm and Titanfall showed how it best suits the general design of the Castor. With Titanfall, additional buttons were needed for melee capabilities. Meanwhile, in Heart of the Swarm, the buttons were needed to move soldiers across places and slicing off encountered opponents along the way.

Similar to other mice armed with a few buttons, the Castor functioned flawlessly for The Old Republic on a casual gamer level. But it wouldn’t mesh well for high-level players who want quick access to a number of skills within reach.

Its one-size-fits-all grip is comfortable even when playing for a number of hours. The shape of the mouse appears to be naturally accurate. It’s a lot more precise using the Castor compared to other mice models. There’s no doubt the sensor played a major role in that aspect. The ergonomics can be felt in placing the cursor precisely where it’s supposed to be.

There was never a cramping experience or other pain felt when making use of the Castor. The overall smoothness of the curve never led to any pain pressure when the hand is placed on the body. The mouse is really comfortable to use. Even when using a combination of claw-grips and palm-grips, the Castor can accommodate the hands without experiencing any physical problems.

The Mionix Software

In terms of drivers, Mionix decided to stick with what they felt works really well. The driver suite is easy to explore and lets a user set up the mouse according to personal preferences. As seen on older IR LED gaming mice from the manufacturer, lift-off distance can be adjusted easily. This is a nice touch since it’s a parameter that entails tweaking on a certain surface to fully utilize gaming performance.

The Castor’s software can be found on their official website. After a simple installation, it’ll open on the page above the Mouse Settings page. From there, the user has control on most known features like double-click speeds, button indicators, and polling rate. Under the “MIONIX” label are several tabs with additional options. Under that are five profile configurations.

All five profiles can be customized. A user can re-name, save, export, and import profiles. This ensures the user will have five on-board profiles embedded in the mouse for use anytime. That means not being limited to one profile for use.

One thing that may grab a user’s attention with the software is its Sensor Performance. It’s basically a surface analyzer tool that informs a user on the Castor’s tracking capability on specific surfaces.  A DPI adjustment bar can be seen which is used with a parallel axis or for manipulating the X/Y settings according to gaming preferences.  Pointer speed and lift-distance settings can also be seen for configuration.

The Colour Settings tab is straightforward. It allows for adjustment of LED effects, LED lighting, and adjustments on any of its 16 million plus color options.

The last setting is the macro’s page. It’s standard when setting it up. A macro tab can be seen on the left while an event’s section can be seen on the right. An Events menu is included. It’s fairly easy to use without little or no explanation.

A Support tab shows off links to Support, Registration, FAQs, and software/firmware downloads.


Mionix has been favored by many PC gamers for a reason. With little recognition in the market in comparison to brands such as Logitech and Razer, the manufacturer has put out some of the very best in today’s gaming mice time and again. They’re finally able to make one fit for the mainstream, considering it’s a mouse that can clearly appeal to the masses.

The Mionix Castor has a simple design, is highly versatile, and has the premium feel to overpower some of today’s known mice competitors. As one of the best gaming mice in the market the Mionix Castor is a really good starting point if one happens to be in the market for a mouse that can do it all.

Strong construction, multi-colored lighting option, top notch sensor capability, and adjustable ergonomics are critical features found in a mouse worth around $60 to $90. Mionix’s Caster falls on the lower end of the pricing.

For its pricing, it’s worth the buy. Its grip is really comfortable. So if comfort is the first priority in gaming, then the Castor is a no-brainer.

Where to Buy

Looking to get your hands on an awesome new gaming mouse and the Mionix Castor takes your fancy? Well, jump on over to the official Mionix website where you can pick one up for 59 Euros.

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