Can you put a higher amperage PSU for a laptop to increase graphics power?

[molokow]

Hi, I have a dell studio 15. The charger is only 5A, however, the graphics card inside can use up to 15 amps. Graphics card is dedicated ATI Mobile Radeon HD 5470 Graphics
If I get a 20A charger, but with the same voltage, will my graphics card be able to take advantage of the extra power input, or will my laptop limit it regardless?

Thanks
Daz

 

[Robert Cook]

For one the laptop is the be all end all of power regulation, and feeding it extra amps is a really bad idea, the thing is is that your power brick is probably taking 5 amps of 10 VAC from the wall, and turning it into 12VDC, so 5 amps from the wall can easily mean ~50 amps at 12 volts. using other chargers is not something I would do.