Taking the side panels off we immediately see the included 180mm intake fan on the left panel. On the inside we see plain hard drive trays and fairly typical optical drive locks. We can also see that Sentey has brought the all-black interior finish from the higher end model down to the Optimus. This is a nice touch that gives the case a more finished feel. The Optimus uses the same red clips to lock in expansion cards that we saw in the Arvina so it is important to note you may experience issues with some dual slot video cards. The clips are not difficult to remove and use normal screws.
Flipping the case around you will notice the large mainboard cutout. This will accommodate most aftermarket CPU cooler backplates. I have noted from time to time issues with the AMD slot type, so do double check this with your particular board. You can also see the back of the hard drive trays. This is different than the Arvina where the drive cables were on this side to make use of the cable routing holes. I wish they had carried this to the Optimus. It would have been possible with these trays.
On the tray itself we can also note the holes to mount a 2.5” drive. On the bottom of the case we can see the removable air filter and holes for an optional 120mm fan for an additional intake if you wish. There is also room at the top of the case for an additional 120mm exhaust fan. Last we have the instructions and an included accessory bag.
Now let's install some hardware in this case.