I want to see all future gaming mice with this tech.

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Ever since mouse sensors in premium gaming mice all became generally on par, and especially now that some sensors in budget mice are pretty on par too, it's been difficult to get truly excited about any new rodent-based technologies. But earlier this year, Logitech changed the game with the X2 Superstrike and its haptic-inductive analogue clicks. Now, Razer's got a new techy trick up its own sleeve with its new Viper V4 Pro in the form of FrameSync.

It might not sound quite as initially exciting as analogue switches, but FrameSync promises something that should appeal to a wider base, primarily because of how it can help improve battery life.

An often overlooked benefit of a new sensor and/or MCU (microcontroller unit) is improved power efficiency. An optical mouse sensor takes tons of snapshots per second and feeds these into the MCU, which hands them over to your computer when polled. Any improvements to how efficiently the sensor takes those snapshots, how the MCU processes them, or how they all sync up with each other can improve battery life.

The Viper V4 Pro's FrameSync focuses on this latter part, as the name suggests: the 'sync.' The implications for battery life actually slipped me by a little when I first heard about the technology, because I was focused mainly on what it may or may not do for tracking.

I never really have a problem with tracking using regular 1 kHz or 2 kHz polling if the sensor is decent, though, so FrameSync didn't excite me too much. But now that I've clocked on to the battery life benefits, it's much more impressive than I initially thought.

The basic idea is the same as with G-Sync, FreeSync, or any other variable refresh rate technology: synchronising the hardware in the peripheral to the data or the polling from your system. With monitors, that means refreshing only when a new frame is ready to be displayed. Here, with Razer's FrameSync, it means keeping the mouse's sensor scan in sync with the MCU.

As Razer breaks it down in its diagram above, there are actually three main parts to the scanning and polling process: the sensor captures the picture, then the MCU prepares that capture to be sent to the PC, and then it hands it off to the PC when it gets polled for it.

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