Gran Turismo 5 requires a small install of 256MB to run - but to get the best out of the game, you're going to need to take up a much bigger chunk of your PS3's HDD.
Polyphony Digital boss Kaz Yamauci has recommended players earmark 10GB of space to install the game - presumably to take the heat off the Blu-ray disc.
According to a Tweet from the man himself (translated by Andriasang), Yamauchi believes a 10GB install is required for a "smooth" gameplay experience.
Cripes. We can only imagine what Gran Turismo 6 will take up.
Sony this month detailed a Collector's Edition of GT5, which contains a model car, a key fob and loads more besides.
GT5 is due for release on November 2 in the US and a day later in the UK and Europe.