KitGuru tried the Fractal Design Core 500
A quote from the article:
There are two distinctly different ways to approach the Mini-ITX Fractal Design Core 500. The first is to pack out the drive bays with a ton of storage (optical drive, three hard drives and three SSD) to effectively convert your tiny PC into a server or NAS.Fractal Design Core 500 Review @ KitGuru
The second approach is to rip out some of the bays and build a full-blooded gaming PC. Core 500 supports a graphics card up to 310mm in length along with a liquid cooler using a radiator up to 280mm.
That simply isn't the sort of hardware you expect to be able to cram inside a small form factor chassis and it suggests Fractal Design has created something rather clever.