In Q3 2010 Intel plans to start shipping Core i7 660UM clocked at 1.33GHz and capable of 2.4GHz on Turbo. One quarter later, it plans to ship yet another faster version. The name is Core i7 680 UM and this new CPU is an ultra low voltage core with 1.46GHz clock and 2.53GHz clock with Turbo overclocking feature enabled.

It is quite interesting that it's still tough to find any Intel Arrandale UM – low voltage processors on the market.

Core i7 680 UM has an 18W TDP, two cores with four thread support and integrated graphics clocked at 166MHz, capable of overclocking to 500MHz. The memory works at 800MHz and the CPU has 4MB of cache.

Intel is supposed to ship i7 640UM, 620UM this quarter and apparently the company has been shipping these CPUs as of Q1 2010, but we have still to see any significant numbers of notebooks based on these 18W TDP CPUs.