Intel may be constantly hedging on whether or not it will make ARM-based processors, but Advanced Micro Devices is much more proactive on the matter, having finally released a chip based on it: Opteron A1100. The ARM processor architecture has a serious advantage in terms of power efficiency over x86, and because of that, it has always been the preferred technology for small and mobile devices.
Especially since a low power consumption comes hand in hand with a low level of heat generation.
But servers are another area where energy efficiency is highly prized, and ARM wanted to use that to expend beyond the confines of the mobile market.
For a while, Calxeda seemed to be the harbinger of positive change, but the company went down under not long ago.
Now, though, ARM has a really strong proponent in Advanced Micro Devices, whose Opteron A1100 SoC (system-on-chip) has just surfaced.