Microsoft has unveiled plans to launch a 512MB memory unit for its Xbox 360 games console.

As a result of the increased memory size of the unit, Microsoft has also announced an increase in the official size limit of Xbox Live Arcade games from 50MB to 150MB.

The 512MB memory unit will hit shelves worldwide on 3 April at around $49.99, and will come pre-loaded with the Xbox Live Arcade game Geometry Wars: Retro Evolved from Bizarre Creations.

The existing 64MB memory unit will drop in price from $39.99 to $29.99 following the launch of the new version.

The new memory unit will provide Xbox 360 owners with expanded storage capabilities, allowing them to store and transport their gamer profile and game data.