j ai checke sur ce site
http://www.cpu-world.com/Sockets/S [...] 479M).html
il semblerait que cela soit possible d upgrader vers core2duo mobile
"Celeron M 400 or 500 series, Core Solo, Core Duo, Pentium Dual-Core Mobile or Core 2 Duo Mobile (all socket M processors):
The best upgrade option is a Core 2 Duo Mobile T7600 or T7600G. The T7600G has unlocked clock multiplier and can be overclocked, but it's very difficult to find.
If the T7600 / T7600G is too expensive for you then consider upgrading to slower Core 2 Duo Mobile processors.
If you motherboard doesn't support Core 2 Duo Mobile CPUs then your best upgrade option is a Core Duo T2700..."