Late 2012 or Early 2013 line:
11 inch MacBook: Base 4GB Ram, Dual Core 2.0 Ghz Ivy Bridge, 128GB SDD (optional 256GB), Integrated graphics
13 inch MacBook: Base 4GB Ram (optional 8GB), Dual Core 2.2 Ghz Ivy Bridge , 256GB SDD (optional 512GB), Integrated Graphics.
15 inch MacBook Pro: Base 4GB Ram (optional 8GB), Quad Core 2.0 Ghz Ivy Bridge, 256GB SDD (optional 512GB/1TB), Dedicated Graphics.
17 inch MacBook Pro: Base 4GB Ram (optional 8GB), Quad Core 2.2 Ghz Ivy Bridge, 256GB SDD (optional 512GB/1TB), Dedicated Graphics.