Burst mode on Atom/Series-M CPUs has a lot of similarities to Turbo-boost on i3/i5/i7 etc but there are some significant differences too – bit too technical to get into here.
The Turbo-mode on the Core iSeries is the *minumum* guaranteed multiplier that the CPU can reach under the right conditions, and the CPU is advertised at the standard, not max bus multiplier speed.
For the Atom series Burst mode is the *maximum limit* of multiplier boost, and the speed they are advertised at. Burst mode CPUs can also drop a lot lower than the minimums available to Turbo, and can dynamically switch up/down larger chunks of the rest of the chip (GPU/Camera/USB & I/O etc).
For both methods the the frequency depends on how many cores are active, and for the Burst mode the overall power consumption and temperature of the chip package as a whole is given much more importance.
If all the other cores are idle and at low enough power draw and temperature a single core may reach an extra 4x base bus clock multiplier (for a short while, until it’s temperature rises beyond limit allowed)
If more than one core is under load then each one is allowed a boost of an extra 2x base bus clock frequency – again, until it’s temperature and/or power draw rises beyond the threshold that’s been set.
The advertised “base” Atom frequency is supposed to be a value that can be maintained pretty much indefinitely and remain within the designed temperature/power limits of the whole package.
TL;DR :
Maximum speed single core, short term = 1.84 GHz
Maximum speed multi core, short term = 1.64 GHz
Standard base, multi core, long term = 1.44 GHz
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