Intel promised Ivy Bridge's graphics will be up to 60 percent more potent than those found in the Sandy Bridge CPUs:
Ivy Bridge's GT2 configuration has 16 EUs, no word on how many the GT1 configuration will have. As a result Intel is expecting a 60% increase in 3DMark Vantage scores (Performance Preset) and a 30% increase in 3DMark '06 scores. IVB GT1 on the other hand will only see performance increase by 10 - 20%. If we look at the 3DMark Vantage data from our Llano notebook review, a 60% increase in performance over SNB would put Ivy Bridge's GPU performance around that of AMD's A8. It remains to be seen how well this translates into actual gaming performance though.
The other information about Ivy Bridge's GPU has been known for a while: DX11, OpenCL 1.1 and OpenGL 3.1 will all be supported.