Oups...

C'est ballot… :

It appears as if some manufacturers are disabling 64 bit CPU support within the BIOS - and not enabling the user to turn it back on via BIOS settings.

Intel has a tiny piece of fine print on the Atom specifications page that states: "64-bit computing on Intel® architecture requires a computer system with a processor, chipset, BIOS, operating system, device drivers and applications enabled for Intel® 64 architecture. Processors will not operate (including 32-bit operation) without an Intel 64 architecture-enabled BIOS. Performance will vary depending on your hardware and software configurations. Consult with your system vendor for more information."

It's not possible to move the cursor up to any of the settings in gray. In short: the 64 bit support is disabled. My real question is "why?"… Asus wouldn't have disabled this without good reason. My guess is that Intel sold Atoms to Asus at a lower price - but demanded that 64 bit be disabled in the BIOS, leaving them only 32 bit.

Bon ben j'aurais 3Go sur 4Go de disponible… Encore un argument pour des bios libres.