The StarTech ATXPOWER300B 300W power supply has a maximum wattage output of 300W. This is a very low PSU capacity, and should only be used when powering a low power system. Remember that a higher PSU capacity does not necessarily equate to a higher wattage output and a more expensive electricity bill. In fact, you may find that a higher capacity PSU will function more efficiently than a lower capacity PSU because it is dealing with a lower percentage of its maximum load - that is, it is not being stressed to the same extent.

The StarTech ATXPOWER300B 300W does not appear to have an 80 Plus certificate, so make sure it is as effective as you need it to be if using it in a build.

The dimensions of the StarTech ATXPOWER300B 300W (LxWxH) are 15cm x 14.9cm x 8.5cm. Make sure to compare these measurements against the case you desire if planning on using it in a build.

The StarTech ATXPOWER300B 300W is not modular, meaning that cables are built into the PSU itself and cannot be taken out and connected back in as necessary. This can result in difficult cable management and consequently a messy build and poor airflow.

The StarTech ATXPOWER300B 300W is not designed for low volumes, meaning that its constant drone while your PC is on could potentially be noticeable and irritating, though this may only be a problem for those that require silent environments.