i5-470UM vs i3-380UM, differences? [SOLVED]

Hello. I am looking at a new Dell Vostro V130. I see that they are now shipping with either of the following two IntelĀ® Coreā„¢ Series Processors:
i3-380UM (3M Cache,1.33GHz,800 MHz FSB)
i5-470UM (3M Cache, 1.33GHz, 800 MHz FSB)

They are both already ULV (ultra low voltage) processors, so what is the difference?!

Great question! Basically, the i5-470UM has turboboost enabled while the i3 does not. This means that the i5 CPU can dynamically overclock one of the cores up to speeds up to 1.86GHz. No user intervention is required and this turboboost will normally occur in single threaded apps.

Specifically, when one core is idle the active an be “boosted” to a higher clockspeed while still maintaining an overall low level of power consumption and heat. When both cores are significantly active, the turboboost will likely not occur at that time as the CPU is already operating near its limits.

Recommendation: if you can find a good price on the i5 laptop, go for it! The Turboboost feature may give you a signficant speed boost in some apps and there are no significant drawbacks.

More info below:

IntelĀ® Coreā„¢ i5-470UM Processor (3M Cache, 1.33 GHz)with SPEC Code(s)SLBXP

IntelĀ® Coreā„¢ i5-470UM Processor (3M Cache, 1.33 GHz)with SPEC Code(s)SLBXPhttp://ark.intel.com/Product.aspx?id=50026[official Intel product page for this CPU]
Intel Turbo Boost – Wikipedia, the free encyclopediahttp://en.wikipedia.org/wiki/Intel_Turbo_BoostIntel Turbo Boost is a technology implemented by Intel in certain versions of their Nehalem-based CPUs, including Core i5 and Core i7 that enables the processor to run above its above its base operating frequency […] The increased clock rate is limited by the processor’s power, current and thermal limits, as well as the number of active cores and the maximum frequency of the active cores.
IntelĀ® Turbo Boost Technology 2.0

IntelĀ® Turbo Boost Technology 2.0http://www.intel.com/technology/turboboost/index.htmntel has optimized IntelĀ® Turbo Boost TechnologyĀ¹ to provide even more performance when needed on the latest-generation IntelĀ® microarchitecture code name Sandy Bridge. IntelĀ® Turbo Boost Technology 2.0 automatically allows processor cores to run faster than the base operating frequency if it’s operating below power, current, and temperature specification limits.

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