(question) thinkpad t420s user here, intel drivers?

installed gentoo yesterday and i'm pretty new to gentoo overall but i have a question, in the gentoo wiki on the intel section it says that sandybridge should be a part of the "intel" VIDEO_CARDS, but when looking at other similar models and other people in the forums they use "intel i915" instead? does someone here know which i should use, currently i'm compiling everything with just "intel" but if it all goes down i'd have to do it all over again and wouldn't even know if it helped, if anyone knows what i should use that'd be much appreciated!