Can I upgrade my Toshiba A305 graphic card

I've a decent graphic card, that are just able to run my games. I was just wondering, is it possible to upgrade my ATI Mobility Radeon 3650 graphic card from a 512MB to a 1GB. Because, its sounds likes it can. But my knowledge is somewhat missing at this point of time.

A305-S6916
Processor: Intel® Core™2 Duo Processor T6400
Operating System: Genuine Windows Vista® Home Premium (SP1, 64-bit)
Memory: 4GB PC6400 DDR2 800MHz SDRAM
Memory Size: 4GB
Memory Speed: PC6400 DDR2 800MHz SDRAM
Display Type: WXGA with TruBrite® Technology
Display Resolution: Supports 720p content, 1280x800
Graphics Engine: ATI® Mobility Radeon™ HD 3650
Graphics Memory:512MB DDR discrete memory + up to 1790MB shared memory w/ATI HyperMemory™ technology

Edited: In order to give reviews a better idea of what Laptop and graphic card Im running.

 

I very much doubt your laptop supports independent updating of your graphics because most don't. A brief Google suggests that this is indeed the case.

 

Thank you, ddp

For moving my thread into the correct forum, I was in a bit of hurry and didn't see that they had a forum for "Other PC Hardware". I have A305-S6916 Toshiba Satellite.

I have edited my post on the details about the version of my laptop.

 

Thank you, for your help with my situation I'm having. I will check that site that you posted for help. I'm sorry that I couldn't respond sonner, we were installing carpet and tile our entire house.