So I looked up some specs.
Here's the specs of a fan similar to the one in the Xbox.
Here's the NF-A6x25-FLX
Each Xbox fan has a spec of 1.037 m³/min, which is 62.22 m³/h, while the Noctuas can do 29.2 m³/h. So the stock fans have about double the airflow than the Noctuas. The stock fans also...
That's what I was getting at. Old games often used textures for shadows rather than doing any kind of lightmaps. Sometimes they get dumped with everything else and can look like crap when upscaled.