It is easier to show a picture than to write 10 lines with cooling possibilities. As can seen below one can easily build in massive cooling hardware, if needed...  The In Win engineers opted to get ambient air into the case via the bottom part and the warm air being expelled via the aft, power supply and the side panel. I personally prefer front intake cooling, than the bottom to top cooling as illustrated, just for less dust clogging in the filters and fans, however in In Win's defense the bottom version is easier to clean as one is not obliged to remove the front panel to gain access to the dust filter.

We have seen users install a 360 radiator in the bottom, though they were mostly running single GPU configurations. If one goes for SLI or Crossfire installations appropriate low profile fans are recommended. The steel side panel has a honeycomb pattern to allow side way ventilation.

A total of seven PCI ventilated expansion brackets should give users plenty of upgrade options, no luxurious thumbscrews to be spotted. All smart choices to lower without a doubt the price tag.

The front panel is also more standard equipped than e.g. the IN WIN 805. No USB Type C port here, just two USB 2.0 and two USB 3.0 ports and the headphone and microphone jacks for you digital audio pleasure. Once powered up the NEON LED illuminates the previously mentioned connections and ports nicely. The big square power button and yes this time equipped with a small rectangular reset switch conclude the equipment of the front I/O panel.

Storage wise the In WIN 303 is has room for up to three 2.5inch HDD platters or SSD's on the front side of the motherboard panel. On the backside of that same panel one can opt to install either two 2.5 or two 3.5 inch drives. All drives are installed on an easy removable bracket.

Worrying part might be the lack of airflow on the backside of the motherboard panel, as this is where you might install the 3.5" rotational HDD platters. Heat will get easily trapped and might reduce the lifespan of your storage devices. In Win had better reversed the 3.5 brackets to the mainboard chamber, or at least added some extra ventilation holes at the bottom of the side panel.

Even though they get less and less used again no option to install any sort of optical drive. Many users still might have their favorite game titles on DVD's etc... always a miss in my book, so before buying this case consider if you need optical drive support yes or no.