Driver

The software isn't needed for the Logitech G900 Chaos Spectrum to work, but it does unlock many more features.


This is your home screen; now, they look very similar, but with the toggle button, you can choose whether to customize the stored profiles or let the software search for the games on your system to use profiles stored for each game. I let it do a quick search on mine and it found eleven game profiles. I don't have many games installed on this machine and was quite surprised that it found so many.


When in on-board memory mode, this is the screen over which you can change buttons and add new functions, or record macros. As you can see, you can change the layout depending on how you configured the mouse.


Programming the mouse is easy as you simply have to right-click the button you wish to change to then click on "Assign New Command". Once you have done so, you can select a predefined options or record a macro. Recording a macro is easily done; simply hit the "Start Recording" button and type away. You can edit these macros by right-clicking on them, which includes the option of deleting or inserting delays, adding mouse events, and more.


Use this screen to pick your lighting zones on multiple profiles and increase or decrease the brightness and speed of any of the effects you wish to use. If you have multiple Logitech G products, you can opt to sync your Logitech G devices to have your lighting setup spread across multiple devices.


You can check on the battery's status on this page; you can also pick the lighting options here since switching them off will increase battery life.


This page allows you to log in your gaming surface, which maximizes the sensor's accuracy. I used this option with multiple surfaces and saw minimal to no change; the sensor tracked very well on every surface regardless.


This heat map shows you how often you've clicked each button, with the colors changing depending on how often each button is used. I am not really sure where such an option would be of use, but it does record your clicks per second also if you wish it to.


This is the home screen you will see if you wish to customize game profiles rather than an on-board memory profile.

Performance

The performance of the Logitech G900 Chaos Spectrum is fantastic. I played the usual games I test mice with, including Overwatch, CS:GO, Total War, etc., and also used it for photo editing and general use. It is very comfortable to use, and the PMW 3366 tracked perfectly. The fact that you can use this mouse in wired and wireless mode with no noticeable performance loss is very impressive also.

The software is nice and easy to use; ranging from setting up macros to changing lighting effects, I had no problems with it throughout the time I used it. The customization options are quite impressive too. Being able to change the configuration to suit your needs is great. At first, I wondered why they wouldn't just use all the buttons and wondered why Logitech gave the option to remove buttons also, but their reasoning became clear as soon as a left-handed friend used the mouse and kept accidentally pressing the buttons with his little finger. I put the blanking plate in and it stopped. He actually purchased one on Cyber Monday following his brief experience with it.

The switches are also excellent; the Omron main switches have a satisfying click whilst not being too stiff or loud and the scroll wheel is great also.


This gif doesn't really do the LEDs justice since I couldn't get my camera to capture them properly. Really, the colors are far better and there is no stutter between them; as you would expect, these do transition smoothly.


When the battery is charging, these indicators allow you to see the charge level.


The LEDs on the Logitech G900 Chaos Spectrum are still highly visible in bright areas.