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ASUS ROG Keris II Ace
Gaming Mouse Review
Technology
- MCU:Nordic nRF52840
All mice contain a small circuit board inside to handle the connection between inputs and the computer. Some are more complex than others, which is why these so-called Microcontroller Units (MCUs) are needed, which are essentially specialized miniature computers. Most modern mice today are equipped with more complex microcontrollers to manage things like stored profiles and CPI settings and to ensure a smooth connection, especially in wireless mice.
- Sensor:PixArt PAW3950 (ROG Aimpoint Pro)
- Resolution:42,000CPI
The resolution of a mouse, also known as CPI, indicates how many pixels the cursor on the screen moves when you move the mouse one inch on the mousepad or table. Many mouse manufacturers and some online sources use the term DPI to refer to the same thing. However, DPI stands for ‘Dots per Inch’ and refers more to screen resolutions, while CPI stands for ‘Counts per Inch’ and directly relates to the sensitivity of a mouse. The higher the CPI of a mouse, the “finer/more precise/more frequent” the sensor can scan the surface. However, this does not mean you should play with the highest CPI.
- Polling rate:8,000 / 4,000 / 2,000 / 1,000 / 500 / 250 / 125Hz
The polling rate, also known as the report rate, is the frequency at which the mouse communicates with the computer and makes inputs (responds). The polling rate is measured in Hz and can vary between 125 Hz and 8,000 Hz depending on the brand and model of the mouse in question. For example, a mouse with a polling rate set to 1,000 Hz will update its position on the screen 1,000 times per second, or every 1 ms. The higher the polling rate, the more “real-time” the cursor movement you see on the screen will be.
- LOD:low, high, mousepad calibration
The Lift-Off Distance (LOD) refers to the height at which a mouse sensor stops tracking the surface it’s on. A high LOD means that the mouse continues to track even when lifted off the surface. Therefore, a low LOD allows tracking to stop sooner, preventing unwanted mouse behavior. On the other hand a higher LOD means the mouse will draw more energy which often results in a crispier feeling but for the cost of less battery life.
- Motion Sync:(not adjustable)
Many of the latest high-end gaming mice offer the option to enable Motion Sync, which synchronizes SPI reads with USB polling, resulting in less jitter. This feature is often found in PixArt 3370 or newer sensors. Motion Sync has its pros and cons, and whether or not to use it often depends on the games you play and how much you notice these extremely fine differences.
When correctly implemented, Motion Sync promises higher sensor reactivity by synchronizing the signals the mouse sends at the exact intervals the PC is looking for these data. This leads to more consistent data exchange, which helps in tracking targets better. However, while Motion Sync is enabled and the sensor tracks more consistently, it pushes data to the next polling event, leading to a minimal higher input delay of a few milliseconds, depending on the MCU and sensor used, which polling rate is utilized, and how much power the components are allowed to draw (LP, HP, Corded / God Mode). In short, Motion Sync is comparable to VRR technologies like G-Sync, where one must decide if they are willing to sacrifice a minimal delay for a smoother experience on the monitor.
I currently recommend disabling Motion Sync
- Switches:ROG Optical Micro Switch (100M)
Under each mouse button, there is a microswitch (switch) that creates the clicking sound and sends the input signal to the computer. A microswitch consists of an outer plastic housing and a small button connected to the internal mechanism. The inside of a switch contains a spring and two metallic contact points that close upon activation to complete the circuit. Currently, two types of microswitches are used in mice – the good old mechanical switches and the newer optical switches. What makes microswitches so essential for mice is that they require very little force to activate, often just 50g. Once activated, they respond almost instantaneously.
There are many manufacturers of microswitches. The more well-known ones include Omron, Kailh, Huano, Razer, and TTC. - Switch type:optical
- Debounce:0ms & not adjustable
Debounce is the time a switch takes to register a keypress or mouse click. In mechanical keyboards and gaming mice, the switch can “bounce” several times when pressed, causing the device to register multiple inputs for a single press. Debounce time helps eliminate this issue by ignoring additional inputs that occur within a predetermined timeframe after the first press. However, the higher the debounce, the higher the delay of the registered “clicks.” Therefore, one aims to have as low a debounce as possible without “double clicks.”
- Click latency:1ms
Measurement values relative to the base (0ms) of the Zaunkönig Mk2 & Razer Viper 8k
Click latency is the time delay between the physical click of a mouse button and the subsequent action performed on the screen. In gaming, this delay can significantly impact the player’s performance, especially in competitive gaming. For example, in first-person shooter games, the delay between clicking the mouse button to shoot and the action executed on the screen can mean the difference between winning and losing. Several factors can influence click latency, including the hardware and software used, the type of connection, and the computer’s processing speed. Gaming mice designed for competitive gaming typically have low click latency to provide a fast and responsive gaming experience. Some gaming mice also have customizable click latency settings, allowing players to adjust the response time according to their preferences.
- Wireless:
- Battery capacity:300mAh
The capacity of the battery is indicated in mAh, which stands for milliampere-hours. It is a unit for measuring the electrical charge stored in a battery. The higher the mAh number, the more charge the battery can store, and the longer it will last.
- Battery life:16h
Important note:
The battery life always refers to the “best” mode that generally consumes the most power. This means:
- highest polling rate (e.g., 4,000 Hz)
- best wireless mode (e.g., 2.4G)
- best sensor mode (e.g., Comp-Mode on)
- RGB (on if available)
- Charging via:USB Type-C
Dimensions
- Size:medium
- Length:121.1mm
- Grip width:61.3mm
- Height:41.5mm
- Weight:53.7g
- Shape:ergonomic
Design
- Color(s):black, white
- Finish:matt
- Design(s):solid color
Product images
Miscellaneous
- Available since:April 12, 2024
- RGB:(adjustable)
- NVIDIA® Reflex compatible:
NVIDIA G-SYNC Displays with Reflex feature the world’s first and only System Latency Analyzer, capable of detecting clicks from Reflex-compatible mice and measuring the time it takes for the resulting pixels (muzzle flash) to change on the screen. Start every fight with the confidence and assurance that your PC is operating with the lowest possible system latency.
- Paracord:
Paracord is typically a woven or braided (not to be confused with traditional heavy braided cables) nylon cable, used in a variety of applications. Paracord became famous for its use in the military and climbing industries and is considered incredibly durable. When used in gaming mice, Paracord cables are usually lighter than traditional mouse and braided cables. The light design and flexibility allow for more freedom of movement, resulting in easier movements and quick pivots during gameplay. Besides the lower weight, Paracord also offers less “cable drag” because nylon has lower friction. Combined with a mouse bungee, the negative aspect of using a wired mouse practically disappears for most users. However, it’s noteworthy that not all wired gaming mice include a Paracord cable, and not all Paracord cables are the same. This is important to consider when purchasing a new mouse, as a wireless mouse may still be lighter or more free in movement.
- Cable type:Paracord
- Mouse skatez:Default PTFE
- Software:ROG Armoury Crate
Disclaimer: The data and mousepad specifications on my website are provided “as is, as available” without any warranty. I assume no responsibility for any damages that could be caused by errors on my site. Please verify all information directly on the manufacturers’ websites.
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ASUS ROG Keris II Ace Review: Pushing Boundaries with High Polling Rates and Lightweight Design
The ASUS ROG Keris II Ace is the latest in ASUS’s lineup of performance-focused gaming mice, and it delivers on several fronts, including ultra-lightweight construction, high polling rates, and a durable build. While it doesn’t quite dethrone the titans of the wireless gaming mouse world—like the Razer Deathadder V3 Pro or the Ninjutso Sora V2, it carves out its own space with a respectable set of features and competitive performance.
Design and Build Quality
The Keris II Ace may not look like the original Keris, but the revamped design is a clear nod to the Zowie EC2 shape archetype, making it a safe choice for right-handed ergonomic users. ASUS has opted for a bio-based nylon shell, resulting in a remarkably lightweight mouse at 54 grams. Despite the featherweight construction, the Keris II Ace feels sturdy with no noticeable flex or creaking under pressure. There’s a slight rattle from the main buttons when shaken, but it’s not something you’ll notice during regular use.
ASUS has always been generous with its accessory pack, and this time is no different. The Keris II Ace includes replacement mouse feet and grip tape, adding a layer of customization to suit different playstyles and surface preferences. The PTFE feet glide smoothly across various surfaces, ensuring you stay in control, even during fast-paced movements.
Buttons and Scroll Wheel
The optical switches on the Keris II Ace (ROG Optical Micro Switches (100M), provide a consistent performance over time, with no risk of double-click issues that mechanical switches sometimes develop. However, like many optical switches, they do have a slightly duller click response, which may not be as tactile or satisfying as mechanical counterparts. Pre- and post-travel on the main buttons are minimal, keeping things responsive even in competitive scenarios.
The side buttons use Kailh surface-mounted switches, which manage to offer almost no post-travel but do have a bit of pre-travel. While feedback on these buttons isn’t as sharp as full-size mechanical switches, their actuation is consistent. The TTC “Gold” scroll wheel encoder offers quiet operation, but the tactility is average, with steps that lack clear separation, making rapid weapon-switching or other scroll-based actions a bit less precise than some might prefer.
Polling Rate and Sensor Performance
The ASUS Keris II Ace is powered by the ROG AimPoint Pro sensor, boasting a CPI range up to 42,000 and delivering top-tier tracking performance. MotionSync is sadly not configurable and permanently enabled but it is ensuring consistent tracking accuracy across all polling rates. Polling rate stability is excellent, whether you’re using it wired or wirelessly, ensuring that performance doesn’t falter even in the heat of battle.
Now, let’s dive into one of the most notable features: the polling rate. The Keris II Ace offers 8,000 Hz polling in wired mode and up to 4,000 Hz wirelessly – a huge step up from the standard 1,000 Hz most gaming mice offer. This translates to smoother tracking and faster response times, ideal for competitive gaming. However, compared to other top tier mice on the market like the Razer Viper V3 Pro, Lamzu Thorn or even the new Logitech G Pro X Superlight 2 dex, which all offer 8,000 Hz polling wirelessly, the Keris II Ace falls slightly behind in terms of wireless polling rate. That said, 4,000 Hz wireless is still a substantial improvement over most wireless mice, offering significantly better performance for those upgrading from older models limited to 1,000 Hz.
In terms of motion delay, the Keris II Ace performs well at 1,000 Hz but slightly underperforms at 4,000 Hz in wired mode compared to top competitors, with roughly a 3 ms delay. Still, most polling rates remain within 2 ms of each other, ensuring that the difference won’t be noticeable for the vast majority of players. Click latency in wired mode hovers between 0.3 to 0.4 ms, while wireless is a respectable 0.5 ms, putting it on par with competitors like Razer, PULSAR, Endgame Gear or LAMZU.
Battery Life and Software
ASUS claims up to 107 hours of battery life, likely measured at 1,000 Hz, and while real-world results might vary, it’s safe to expect around 100 hours without illumination. At 4,000 Hz, the battery life drops significantly as expected, and is around 30 hours. This puts the Keris II Ace on par with most wireless gaming mice in its class. Bluetooth mode further extends battery life, and charging via the included USB-C cable is quick and painless. The paracord cable is long enough but feels a bit stiff and could be improved for a better gaming experience when playing while charging.
One major point of contention for ASUS mice has historically been the Armoury Crate software, and unfortunately, this trend continues. While Armoury Crate Gear – the streamlined version for peripherals – mitigates some of the previous issues, it’s still a resource hog with multiple background processes. Fortunately, the Keris II Ace allows for hardware-based adjustments for key settings like polling rate and lift-off distance via button combinations, so you can bypass the software entirely if you prefer and which i recommend.
Final Thoughts: A Competent Contender
At a price point of $159.99, the Keris II Ace sits among the premium mice offerings from other brands, and though it doesn’t quite match the top tiers wireless performance at 8,000 Hz, it brings a lot to the table with its 4,000 Hz wireless polling, ultra-lightweight design, and optical switches. For users looking to step up from 1,000 Hz wireless and craving a lighter mouse with reliable performance, the Keris II Ace is a solid choice.
It’s not the most groundbreaking in every area, but it covers all the essentials for a high-end gaming mouse, and can be recommended for competitive gamers who want great performance, like the shape and dont see 8,000Hz as mandatory.
Teardown images
Available at:Manufacturer's suggested retail price (MSRP):$159.99
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Product video
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More InformationManufacturer's product description
ROG Keris II Ace – PRO PRECISION
Experience unparalleled precision like never before with the ROG Keris II Ace. Featuring an ergonomic shape tested by top esports pros for maximum comfort and improved control, the 54-gram Keris II Ace is packed with industry-leading features designed to help you unlock your competitive gaming potential.
Redefined Ergonomics
The Keris II Ace was developed with input from FPS esports professionals, optimized for ultimate comfort and control.
54g Ultra-Lightweight
Streamlined, lightweight design reduces fatigue after hours of intense gameplay.
Specifically Designed Shape
The sides are inwardly sloped, providing a firm and effortless grip.
Perfectly Positioned Side Buttons
The side buttons are placed for better thumb accessibility.
Extended Side Rail
The rail on the right side is shaped to provide more space for your ring finger, allowing better mobility for your index and middle fingers.
ROG Polling Rate Booster:
Experience ultra-smooth cursor control with the ROG Polling Rate Booster – a new ROG-exclusive feature that increases the mouse’s polling rate up to 4,000 Hz in wireless mode and up to 8,000 Hz in wired mode. The higher data transmission rates result in reduced input lag and much smoother, more accurate cursor movements on the screen, translating to more precise tracking and swiping motions.
ROG AimPoint Pro Optical Sensor:
The new ROG AimPoint Pro optical sensor with 42,000 dpi and an industry-leading <1% deviation allows you to track and flick with absolute precision. With the new track-on-glass technology, this level of performance can now be carried over to almost any desk surface.
ROG Optical Micro Switches:
The new ROG-exclusive optical micro switches have an impressive lifespan of 100 million clicks and deliver crisp signals with instantaneous actuation. The click consistency between the left and right mouse buttons is improved through a stringent process that ensures switches are paired within a 5-gram force deviation range.
ROG SpeedNova Wireless Technology
Achieve victories with a wireless solution recognized by esports professionals.
Performance On-The-Go
- Onboard Control – Pre-set mouse settings to go
- ROG Omni Receiver – Multi-device connectivity via a single dongle
- Tri-Mode Connectivity – Connect via wired USB, 2.4 GHz RF, or Bluetooth®
ROG Patterned Grip Tape
Included mouse grip tape provides a more secure hold while adding some flair.
Smooth and Fast Glide
The ROG Paracord and 100% PTFE mouse feet deliver ultra-smooth, drag-free mouse movement.
Armoury Crate & Aura Sync
To sync lighting with other Aura Sync products, install the original Armoury Crate to access an endless spectrum of colors, preset effects, and wallpapers that elevate the style of your entire setup to the next level.
*Works with Windows Dynamic Lighting
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