Here’s what I found on the internet for you: Basically, the case your looking at is an ATX form factor case. From what I’ve gathered, the Aurora R6 motherboard is a mini-ATX form factor motherboard. The reply for this question (from Tom’s Hardware) I’ll let you read yourself. Hope this helps! (1) Your new case: InWin 303 White ATX Mid Tower Computer Case with Tempered Glass, White by InWin (2) https://www.intel.com/content/www/us/en/...-systems/desktops/pcs/alienware-aurora-r6-H39411677.html (3) http://www.tomshardware.com/answers/id-2168572/generally-micro-atx-motherboard-fit-atx-case.html

Here’s a picture of the 9818L model and the placement of the hidden screw. Here’s some other pics of the 9818L (Lithium Ion+^(®) Stainless Steel) that might be helpful: