There is no doubt that USB ports on the front of the PC are very useful to connect devices such as a USB flash drive, it is much more than "delete and replace" rather than, for example, a mouse and keyboard, which is why it often connects to the USB rear.
However, electrically the USB provided by the motherboard behind it has a direct connection to it than the front ports, since those have a cable in the middle that connects to the inboard ports, but his quality depends on the box maker
Maybe connecting USB 2.0 or any other service we wouldn't mind not having too much speed, but where that connection will be pendrive or external hard drive, yes we want to be able to have it the best transmission speedIs that right? So, are we losing performance when we connect these devices to a USB port? Let's examine it.
Connect to the front and the USB rear: performance testing
In our tests, we will use the 128 GB Toshiba Transmemory EX-II USB 3.0 pendrive, an app whose download speed is 222 MB / s for readings and 205 MB / s. The box used is the Corsair Crystal 680X RGB, a timeless box, and the children's board is the MSI Z370 Gaming M5, its USB controller signed by ASMedia (model ASM3142, USB 3.1 Gen 2). As for hardware, as you can see, we shouldn't have too many test limits.
This is the result of working with a pendrive connected to one of the front ports:
And this is a result of the same USB drive that is connected to one of the motherboard's back ports:
As you can see, the difference in performance of connecting a USB flash drive to both locations is small, and is actually about the measurement error rate. So, we can see that there is no loss in operation when connecting USB pendrives to the front of the box instead of to the USB rear. Of course, in the case of a highly powered device, this item can change dramatically.