It was difficult to create optimal airflow in the 303, but it's fine now.
The PSU was shutting off due to overheating, the gpu was getting warmer by every minute and the exhausted air wasn't warm at all. Fixed by turning the psu outwards and adding a fan near the SSDs utilizing the "GPU holder" provided with the case.
There are 3 140mm be quiet fans in the top, but they are practically useless, because the back of the case is too restrictive.
I stick all kinds of things on the front of the case since it is boring 90% black. A dbrand artwork, a floppy disc and the stickers from my laptop and monitor.
2 metres of RGB strips are controlled by the mobo.
I made 2 wooden plaques, which are above the rear fan and on the unused ssd tray. One with the skyrim emblem, burned lines and red woodstain, the other with a few logos burnt into the wood.
I have a pair of Hyperx Savage DIMMs, but they seem to be EOL.
I added white tubes and 2 black Alphacool 90 degree fittings to the watercooling loop.
The 240mm rad is in push-pull between 4 Bitfenix Spectre LEDs.
The CPU has Thermalgrizzly Conductonaut under the IHS and EKWB Ectotherm on it. The fluid is ionized water with some dish soap.
7700k - 5.0ghz - <70C
ram - 3000mhz - CL16 - 16GB - 4 DIMM
980 - 1450mhz core - <66C