Quad core considered too much for the average user.
Future AMD chip leads Intel by 25 per cent, chipmaker boasts.
Quad-core processor can independently shut down memory controller and cores.
Forthcoming 'Barcelona' chip to outpace Intel by 40 per cent, firm claims.
Forthcoming AMD chip to outpace Intel's by 40 per cent, firm claims.
Two packages on a chip will help AMD to regain chip lead.
Chipmaker hopes for fall developer event to take theattention off its shrinking revenues.