As a new member of the Tower series, The Tower 300 shares the same silhouette with its predecessors, offering full display to the system components. The most obvious appearance between its families is the octagon design. You can fit 4090 GPU and a 420mm radiator in The Tower 300, keeping the motion high and the temperature low. Besides two preinstalled top fans, you can also install two 120/140mm behind the motherboard or one 120/140mm fan on top of the power cover or three 120/140mm fans at the right side fan bracket. It provides excellent hardware expandability to accommodates latest PC hardware without compensating the building experience.
Q: Are there any internal 3.5-inch drive bays?
A: This PC case has three internal 3.5-inch bays.
Q: Does the case have any USB Type-C ports?
A: The case has one USB Type-C charging port.
Q: Can the case accommodate a 420mm radiator?
A: You can fit a 420mm radiator in The Tower 300.
Q: How many fans are included in the case?
A: This PC case comes with two fans pre-installed.
Q: What is the maximum height of a CPU cooler that can be installed?
A: The maximum CPU cooler height that can be installed is 200 millimeters.
Q: What is the maximum length of a GPU that can be installed?
A: The maximum length of a GPU that can be installed is 400 millimeters.
Q: How many fans are included in the case?
A: This PC case comes with two fans pre-installed.
Q: What is the maximum height of a CPU cooler that can be installed?
A: The maximum CPU cooler height that can be installed is 200 millimeters.

As a new member of the Tower series, The Tower 300 shares the same silhouette with its predecessors, offering full display to the system components. The most obvious appearance between its families is the octagon design. You can fit 4090 GPU and a 420mm radiator in The Tower 300, keeping the motion high and the temperature low. Besides two preinstalled top fans, you can also install two 120/140mm behind the motherboard or one 120/140mm fan on top of the power cover or three 120/140mm fans at the right side fan bracket. It provides excellent hardware expandability to accommodates latest PC hardware without compensating the building experience.

Build the high-airflow, low-temperature PC of your dreams in the CORSAIR FRAME 5000D high-airflow case, featuring the innovative FRAME Modular Case System offering unprecedented flexibility to perfectly customize your build as you want it. The InfiniRail Mounting System simplifies fan installation, while support for up to a 420mm radiator and a new 3D Y-Pattern Airflow front panel ensure cool air is directed precisely where it’s needed most. The increased width and length ensure compatibility with the most powerful graphics cards and cooling options, with support for reverse connection motherboards future-proofing your system. We provide the frame. You create the art.

North reimagines the gaming PC, introducing natural materials and bespoke details to make gaming a stylish addition to the living space. Fusing design and airflow engineering, the case features fine-patterned mesh ventilation and an open front with real walnut or oak panels. The design is complemented by sleek brass or steel details and an integrated tab for easy access to the top of the case. Inside, North offers an intuitive interior layout and generous compatibility.

The H9 Flow is a spacious mid-tower ATX case designed for high-performance builds, offering a balanced blend of airflow and aesthetics. Its dual-chamber design enhances cooling efficiency and cable management, while fine-mesh perforated panels, angled fans, and generous radiator and fan capacity deliver optimal thermal performance.
| Pros for Thermaltake - The Tower 300 Micro ATX PC Case - Hydrangea Blue | |||
|---|---|---|---|
| There were no pros for this product— | There were no pros for this product— | Design | Internal Space, Airflow, Cable Management |
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Had fun building in it. Squeezed in an 7900xt GPU without a problem. Great airflow and access. Highly recommend if you are looking for a case that a different form factor.
This review is from Thermaltake - The Tower 300 Micro ATX PC Case - Racing Green
Posted by user233635
I love thermal take cases. I had my last one for 10 years and it survived 3 moves. But this case just looks great and has great airflow. It was very easy to figure out and hides all the cables great. I didn’t even build a new pc I just moved every thing into this case and it feels like a brand new pc. 10 out of 10 would recommend.
This review is from Thermaltake - The Tower 300 Micro ATX PC Case - Racing Green
Posted by bestbuycustomer
This is for my husbands gaming setup. It fits on a IKEA square shelf on the top, it’s too small to fit inside but it looks great on display sitting on the top. Our old ones were also on the top but they hung over and didn’t look as aesthetically pleasing!
This review is from Thermaltake - The Tower 300 Micro ATX PC Case - Bumblebee Yellow
Posted by Jennifer
