Is ATI Sunpro 8570 andAMD Readon HD 8570M Is same graphics?

I have a Lenovo G500-59-380754 Laptop(http://www.flipkart.com/lenovo-essential-g500-59-380754-laptop-3rd-gen-ci3-4gb-500gb-dos-2gb-graph/p/itmdmwrcqwwtgscd)

It has a 2gb Dedicated Video RAM. But whenever i Compare it on Systemrequirementslabs then it shows that it has Readon HD 8570M 1GB…
Why i'm facing this problem? I know that i have a 2GB dedicated graphics, ATI Is no more… Is it Internet data base Problem?

Guest

The reference 8570M has 1GB of VRAM, it's possible that a 3rd party vendor could make one with more VRAM. With that said at that laptops resolution ( 1366 x 768 ) 1 GB of VRAM is more than enough, besides the Radeon 8570M isn't exactly a fast video card, it's not really capable of fully utilizing more than 1GB of VRAM anyway.

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