I decided to start out by mounting the power supply (not a good decision as you’ll learn shortly). It is fastened to a special U-shaped frame in the front of the case:

You have to take it out of the case and screw to the PSU. You can’t get it wrong: the frame can only be fastened in the “right?way or not fastened at all.

Then the whole arrangement is put back into the case and gets secured with a couple of screws.

It’s designed well: the power supply of this type (with a 120mm fan) doesn’t practically take part in heat transfer inside the case ?the air is taken from below the case.

The hot air is exhausted through the right panel. You can use traditional power supplies too, but a good PSU with a big 120mm fan is a priori quieter than a same-wattage PSU with an 80mm fan. The noise factor being of highest importance here, the choice is obvious. It was when I tried to install the mainboard that I regretted my not having read the manual beforehand ?when the power supply is already installed, a full-width mainboard just cannot fit into the case. So I had to take the PSU out and put the mainboard in first. There was almost no gap between them after the installation:

I took a micro-ATX rather than a full-ATX mainboard as a more practical option when it comes to laying down the cables.

Once the mainboard was snugly nestled in the case, I turned to drives, particularly to the DVD drive as the biggest of them. You need to pull out the cage to install it: