8400M GT at 512MB?

Hey all, I just received my new laptop FZ4000 CTO and it has the 8400M GT in it. It states UP TO 512MB, but I think it only has 256. How would I go about getting it to 512MB? Also, would 256 to 512 have any effect on the performance when playing Blu-ray on a 56" HDTV 1080p 120hz?

Thanks
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Intel® Core 2™ Duo Processor T8300 (2.4GHz)
200GB SATA Hard Disk Drive [7200 rpm]
3 GB DDR-SDRAM (DDR-667, 2GBx1 + 1GBx1)
NVIDIA® GeForce® 8400M GT
LCD 15.4" WXGA (XBRITE-HiColor™) with integrated video camera
Blu-ray Disc™ Read Only Drive
Microsoft® Windows Vista® Home Premium with Service Pack 1

 

It says 'up to' because it can borrow 256MB of system RAM...and the 'feature' is basically worthless. There will be no performance increase.

 

Hehe...first of all, 512mb is just the company's way of making people buy crappy GPUs...

For instance, a 512mb AR x1300 is nowhere close to a 256mb x1600, since most buyers believe more memory mean faster performance, the company usually puts a HUGE VRAM on crappy cards to appease the general pop...
Really a corporate scheme....a marketing technique if you wish.

Here's the thing: an 8400 card by default only houses 12-16 streamline processors, and they can only use a max of 256mb of VRAM, so in essence the other 256mb are just useless memory put there for no reason other than to make the card seem faster...

Yes, more memory on a high performance card does make a HUGE difference, but on cards like the 8400, really, 256 or 512 makes absolutely NO difference aside from the 50 or more bucks you'll have to spend on the same card....so yeah...watch out....

 

Lots of sellers decieve buyers by adding in the Turbocache/hypermemory along with the dedicated RAM to give bigger numbers

 

thanks guys :-(