what is intel hd graphics 4600 the same as?

No. It's very weak for 3d processing, It's so you don't HAVE to buy a graphics card to browse the internet and use Word, ect.
There are some games that it will "run", but these will all be at the lowest settings, and small resolutions.

http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-7.html (it's in the following tier)
Discrete: 6800 Ultra, 7600 GT, 7800 GS, 8600 GS, 8600 GT (GDDR3), 9500 GT (DDR2)
Go (mobile): 7800 GTX, 7900 GTX

Discrete: X800 XT (& PE), X850 XT (& PE), X1650 XT, X1800 GTO, HD 2600 XT, HD 3650 (DDR3), HD 3670
Mobility: X1900, 3670
Integrated: 6520G, 6530D, 7480D

Integrated: Intel HD Graphics 4000