Product Showcase

Space for seven PCI slots, and yes no extra fans are included but you may install them in the top adn rear. A massive CPU motherboard tray cutout is present though. 
 

 
To the lower left we see the PSU mounting area, you can use ATX PSUs up to 175 mm deep when using the bottom fan location. We'll show you that later on during installation though. At the front-side the PSU sits inside a compartment and thus is covered up.

As stated before, the chassis comes with a good seven expansion slots. CPU coolers may be up to 165 mm tall and graphics cards up to 38cm in length. Here's the backside. Grommet holed for cable routing are present, nothing rubberized though. 
 

 
HDDs are easy to install - you remove the tray, then seat the HDD on there and secure it, just bend that plastic tray a bit and pop it in. You'll spot thick rubber grommets on all holes on these trays to prevent resonating noises from the HDD. It btw is also possible to mount an SSD in these trays.
 

 
Hard to spot but here the HDD is inserted into the lower slot; just slide it in until it clicks secure. BTW - please don't mind the old damaged HDD, it's just a mock-up unit :) 

 
The tray brackets can hold 2.5" SSDs. You'll need to secure each SSD with four mounting screws. It's a very arbitrary simple solution really, but then again, ... there's nothing wrong with simplicity as long as it's functional and effective. And it certainly works just fine.