Graphics on Sony VAIO with ATI 5470

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Switchable Graphics on Sony VAIO with ATI 5470 ?

I am planning to buy Sony VAIO VPCEB14EN/BI (see link below)
VPCEB14EN : E Series : VAIO Laptop & Computer : Sony India

This laptop comes with the ATI 5470 graphics card. When I searched about details of the ATI Mobility Radeon HD 5470 on the google, it is mentioned that it supports "Switchable graphics".
Thus it will allow you to change between the integrated Intel graphics chipset or the ATI Radeon 5470 when you require. If so when using the laptop with the intel graphics you will probably get more than 2 hrs battery backup. But I am not sure of these details.
I am not sure whether this means that the graphics can be switched from the Bios, or if it can be done on demand.

Can anyone provide furthur info this ? Does this Sony Vaio model support switching between the integrated and dedicated graphics and how ?
 
I guess I have ended up answering my own question.

No this series of Vaio do not come with Switchable graphics.

As a note, there are some HP models that do come with switchable gfx.
 
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