The Logitech G603 LIGHTSPEED is a great wireless gaming mouse in Logitech's G Series lineup. It offers what most gamers are looking for, including excellent click latency, a wide CPI range, and minimal CPI variation. You can also adjust the CPI in increments of 50. It's a well-built and very comfortable mouse with a right-handed slant. It's ideal for any hand size with a palm grip, and it works for larger hands with a fingertip or claw grip. Unfortunately, it's heavy compared to most gaming mice. Also, it only has two side buttons, so it isn't as versatile as most heavier mice with additional features and programmable buttons.
Our Verdict
The Logitech G603 is impressive for office use. It's a very comfortable wireless mouse that can connect to your computer either through its proprietary receiver or Bluetooth. It's very well-made, and there are a few buttons you can reprogram. Sadly, its scroll wheel doesn't offer many extra features like left/right buttons or horizontal scrolling.
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Very comfortable to use.
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Excellent build quality.
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Good selection of programmable buttons.
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Basic mouse wheel with no wheel tilt.
The Logitech G603 is a decent mouse for FPS gaming, but it's heavy, so it's a bit more difficult to move around for quick actions. Still, it has excellent click latency, a wide CPI range, and minimal CPI variation. It's very comfortable, and it feels well-built too. You can also reprogram every button through the G HUB software.
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Very comfortable to use.
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Excellent build quality.
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Excellent click latency.
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On the heavy side.
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No weight optimization.
The Logitech G603 is a good mouse for MMO gaming but isn't specifically for this use, and it has far fewer buttons than a dedicated MMO gaming model. That said, you can reprogram every button on the mouse, though it only has two side buttons. Fortunately, it has excellent click latency, a wide CPI range, and minimum CPI variation. It's also very comfortable and feels very sturdily built.
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Very comfortable to use.
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Excellent build quality.
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Good selection of programmable buttons.
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Excellent click latency.
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Only two side buttons.
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Basic mouse wheel with no wheel tilt.
The Logitech G603 is impressive for travel. It's a wireless mouse that's easy to carry around, and there's a compartment to store the USB receiver. It feels very well-built, so you shouldn't worry about breaking it by tossing it into a bag. It's a very comfortable mouse, and it's fully compatible with both Windows and macOS.
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Very comfortable to use.
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Excellent build quality.
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Fully compatible with both Windows and macOS.
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On the heavy side.
- 7.8 Office/Multimedia
- 8.2 Video Games (FPS)
- 8.1 Video Games (MMO)
- 8.3 Travel
- Updated Sep 08, 2022: We've converted this review to Test Bench 1.3. This update adds a new Sensor Latency test and makes minor changes to several of our existing tests, resulting in test result changes in several sections. For more information, you can check out our full changelog here.
- Updated Sep 06, 2022: We've added a small disclaimer to the Compatible Software Option section which highlights some of the most commonly reported issues users online have encountered with Logitech's G HUB companion software.
- Updated Aug 17, 2022: Following the update to Test Bench 1.2, some of our test results have changed within both the Weight and CPI sections. We've added or modified some of the text in this article to clarify these changes.
- Updated Aug 15, 2022: We've converted this review to Test Bench 1.2. This update simplifies our Weight test and expands on our CPI test from Test Bench 1.1, resulting in changes to test results in both sections. For more details, you can see our complete changelog here.
- Updated Jun 14, 2022: We've updated this review to Test Bench 1.1, which revamped our click latency test methodology. We've updated the text to reflect our new results in various sections, including the Click Latency test box, Usages, Introduction, and other locations where we discuss click latency.
- Updated May 30, 2022: We've converted this review to Test Bench 1.1. This update revamps our Click Latency test and results in changes to test results. For more details, you can see our full changelog here.
- Updated Oct 23, 2020: Converted to Test Bench 1.0.
- Updated Sep 18, 2020: Review published.
- Updated Aug 31, 2020: Early access published.
- Updated Aug 18, 2020: Our testers have started testing this product.
- Updated Aug 18, 2020: The product has arrived in our lab, and our testers will start evaluating it soon.
- Updated Aug 16, 2020: We've purchased the product and are waiting for it to arrive in our lab.
- Updated Aug 13, 2020: The product has won our suggestion poll, so we'll buy and test it soon.
Compared To Other Mice
The Logitech G603 is a good gaminLogitech G703 LIGHTSPEED with HERO Sensor, except it doesn't have RGB lighting and a built-in battery. It's better-built and more comfortable than some other Logitech mice, like the Logitech G305 LIGHTSPEED. Unlike the Logitech G602, it doesn't have many side buttons, so it isn't ideal for MMO gamers.
Also see our recommendations for the best mice, the best Logitech mice, and the best wireless mice.
The Logitech G703 LIGHTSPEED with HERO Sensor is slightly better than the Logitech G603 LIGHTSPEED. Both mice have the same shape, and the G703 has RGB lighting. It has a slightly wider CPI range, a rechargeable battery, and it has RGB lighting. However, the G603 has Bluetooth support, and it's more portable because it has a compartment to place the USB receiver.
The Razer Basilisk X Hyperspeed and the Logitech G603 LIGHTSPEED are decent FPS gaming mice that perform better for the office. The two mice can only be used wirelessly via Bluetooth or their USB receiver, and both have the same number of buttons and comparable sensors. Shape-wise, the Razer is quite a bit bigger and has a thumb rest on the left side. It’s a great fit for almost any hand size or grip type. On the other hand, the Logitech is fairly heavy and is better suited for a palm grip.
The Logitech G604 LIGHTSPEED is much better than the Logitech G603 LIGHTSPEED. The G604 is more comfortable, has lower click latency through its receiver, has a wider CPI range, and has many more side buttons. However, the G603 is better-built, and it's smaller, making it easier to carry around.
The Logitech G603 LIGHTSPEED is better than the Logitech G305 LIGHTSPEED. The G603 feels better built and is better suited for any hand-size with a palm grip. It also has Bluetooth support. On the other hand, the G305 is lighter and has a marginally lower click latency.
The Logitech G603 LIGHTSPEED is better than the Logitech G602. The G603 has Bluetooth support and a much better sensor with a wider CPI range and lower lift-off distance. However, the G602 has many more side buttons, making it a better choice for MMO gaming.
The Logitech G603 LIGHTSPEED is better than the Corsair KATAR PRO Wireless. The Logitech feels better built and more comfortable. Its bigger size is better suited for a palm grip, while the Corsair is better for a fingertip grip. Also, the Logitech's CPI range is wider and more precisely adjustable. However, the Corsair's click latency is lower, and its sensor is more consistent.
Test Results
The Logitech G603 has a simple, yet elegant, design that fits into any gaming or office environment. The gray top and black sides give the mouse a nice two-tone contrast, and the glossy programmable side buttons look good. It looks a bit like the Logitech G403 Prodigy Wireless, except the top panel is all one piece and there aren't any seams where the left and right buttons are. Sadly, there's no RGB lighting.
The Logitech G603 LIGHTSPEED wireless gaming mouse has good portability because of its wireless design, and there's a compartment to store the proprietary USB receiver.
Excellent build quality. The all-plastic body and the scroll wheel are both solid, but there's a slight rattle inside when you shake the mouse. The buttons are clicky and satisfying, and even though it doesn't have rubber grips, the sides don't feel slippery. The feet feel nice and allow you to move the mouse around smoothly.
This mouse is quite heavy by default. The Default Weight result includes two AA Amazon Basics rechargeable batteries with a reference weight of 27.40g each. The Lowest Weight result is obtained by employing an aluminum foil ball adapter, which allows you to use an AAA lithium battery instead of two AA batteries. The aluminum ball used has a reference weight of 0.2g and a diameter of 5.8mm. The AAA battery used is an Energizer Ultimate Lithium battery with a reference weight of 7.60g.
If you're interested in a lighter option, check out the SteelSeries Rival 3 Wireless.
This mouse is very comfortable. It's designed for right-handed people because it has a slight slant to the right. It shouldn't cause any fatigue during long periods of use. Also, the side buttons are well-placed so that you won't accidentally press them, but they're not hard to reach. It's also easy to differentiate between them. For a gaming mouse with similar performance but an ambidextrous shape and a thumb rest, check out the Dell Alienware AW310M.
The Logitech G603 is designed for a palm grip and it's easy to reach all the buttons regardless of hand size.
Well-designed for a claw grip. The back of the mouse has a high profile, so it may be hard to reach the scroll wheel for those with small hands.
This mouse is suitable for a fingertip grip only for those with large hands. People with small or medium-sized hands may have difficulty reaching the buttons.
Unlike the similar Logitech G403 Prodigy Wireless, the Logitech G603 can connect either through its proprietary receiver or through Bluetooth. It uses disposable batteries, so you won't have to worry about regularly charging it. Logitech advertises a minimum battery life of 500 hours and a maximum life of 18 months, but this isn't something we test. If you're interested in a wireless mouse with a rechargeable battery, check out the ASUS ROG Gladius II Wireless.
This mouse doesn't come with a cable. However, it comes with a USB extension cable for the receiver.
You can reprogram every button on this mouse through the G HUB software. You can set a button for profile switching, but you need G HUB downloaded on the computer to do so because the mouse has on-board memory for one profile, and it takes the extra profiles directly from the software.
The Logitech G603 has excellent and very consistent click latency. You won't experience noticeable delays in-game over a wireless connection with its USB receiver. Note that the click latency is higher and much more inconsistent over a Bluetooth connection, but this is perfectly normal. It isn't recommended to use a Bluetooth connection for gaming, especially for playing reaction-based or competitive titles.
The Logitech G603 has an incremented mouse wheel, but it doesn't offer infinite scrolling.
The Logitech G HUB offers remarkable customization options. It's available on both macOS and Windows, and you can reprogram any button. The mouse has onboard memory, but it only stores one profile at a time. There were no issues using this software during testing. However, many users online have reported problems with Logitech's G HUB software, including but not limited to freezing, startup problems, and connection issues with certain devices. If you'd like to share your experience using Logitech G HUB with this mouse, feel free to leave a comment in the discussions.