Why doesnt the GPU that I bough have the video ram that It says it does

[lunatic7867]

I recently bough a PowerColor AX6770 1 GBD5-H RADEON HD 6770 video card.
It says that it has 1 gb of video ram, but when i used systemrequirementslab.com to test If I could play a game, it says that I only have 626.3 MB of it.
Why is that?

 

[MindoverMaster]

Get GPU-Z and tell us what it says. Most likely, that site can not see all your video ram.

 

[lunatic7867]

Oh, thanks. It says that my memory size is 1024 MB's. So my PC can play Need for Speed: The Run over the recommended settings!

 

[jasonalwaysready]

the size of the onboard ram of the gpu has much less to do with how well it will play games than its model and cpu speed.

 

[heister]

Also, what OS do you have? 32bit OSs can only recgonize 4gb of total system ram, ie system ram + gpu ram.

 

[Nitestick]

Also, what OS do you have? 32bit OSs can only recgonize 4gb of total system ram, ie system ram + gpu ram.

This is what I dropped by to say^. You're likely running on a 32 bit OS where it can not address the total amount of memory available to your system.