First of all you have a Ivy bridge processor that's the latest you can buy. Those processors are using a Intel 4000 on die Graphic chip.
Actually that's the best you can have on a intel graphic card today.
I don't say it's super but it's playable. (and i don't think it's your graphic chip problem for your freezes anyway)
(Beside that i wouldn't choose high settings - i would go with medium settings and ( forget Anti-aliasing and Anisotropic Filtering - leave them off )
But one think more. I presume you have installed the DirectX 9.0 drives, have updated to the latest Intel drivers and turned off your Antivirus.
DirectX 9.0: http://download.microsoft.com/download/8/4/A/84A35BF1-DAFE-4AE8-82AF-AD2AE20B6B14/directx_Jun2010_redist.exe
Intel 4000 Drivers: https://downloadcenter.intel.com/default.aspx
So my friend a have something for you:
The Intel Ivy Bridge (Core i7 3770K) Review
http://www.anandtech.com/show/5771/the-intel-ivy-bridge-core-i7-3770k-review/16
(you will see actually how your Intel 4000 performs theoretically)
INTEL HD 4000: SKYRIM (on a Intel Core i5 3210k with 4 Gigs of ram)
http://www.youtube.com/watch?v=Rs8oQGDuMZw
(and now how it performs practically)
HOPE THIS HELPS !!!!!!