If you can give us a Price range/ budget we would be able to help you even more.
Just some general things:
-In general you will not need more than 8gb of ram (preferable two 4gb sticks running at 1600mhz)
-APU's by AMD are great for gaming on a budget, but generate alot of heat.
-Do not worry about gigahertz focus on product tiers (ie A6, A8 or A10 for AMD or i3, i5 or i7 for intel) more ghz does mean faster but it is more usefully when comparing products of the same line
-If you are going for pure gaming w/o a budget aim for an i5 processor by intel (not ULV) at least, though a i5 ULV (Ultra-Low-Volatage) with a good GPU is not a bad pairing either
- For gaming at 1366x768 aim for these graphic card or higher (GT 650m, GT 740m or GT 750m or GT 840m) and any other comparable GPU offered by AMD
- For gaming at 1080p get at least (GTX 660m, GTX 760m, or GTX 860m) or of course higher and any other comparable GPU offered by AMD
- Stay away from these CPU/ APU product lines: A4 and A6 (and A8 if not on a budget) for AMD and Celeron, Pentium and i3 for Intel
- Dual Graphics by AMD are a NO-NO! AVOID!
- A ultrabook with a ULV i5 and a good gpu (i.e. GT 740, GT 650 or anything similar or better) is a good pairing if you want good battery life and moderate gaming
Notebookcheck.com is a good source for comparing laptop parts and finding relatively similar performing products
What is also important is not only the spec but the build quality, like the keyboard ( does the laptop seem to sink a bit everytime i press a key?), viewing angles of the monitor, the mouse pad.
personally i find that ASUS and Lenovo have very good build quality (and some high end Samsung and sony products)
Hope this Helps!