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Due to this product being discontinued (Intel® Core™ i7-4702MQ Processor ), Intel Customer Service no longer supports inquiries for it, but perhaps fellow community members have the knowledge to jump in and help. You may also find the Discontinued Products website helpful to address your request. Thank you for understanding.
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Intel Customer Support Technician
In the right situations, the processor should automatically boost up to 3.2GHz. This would be when a single Core is active and the processor is relatively cool. There are other factors that could affect this, however; I've only talked about two. For example, the laptop manufacturer may have provided a crappy cooling solution and locked the processor to lower boost limits. As well, some laptop manufacturers will also lock to lower boost limits to make up for a crappy battery subsystem.
Hope this helps,