Intel Core i5 2500K
16GB DDR3
2047MB NVIDIA GeForce GTX 670
-Xms4096m -Xmx4096m -Xss2048k
Arsenal Expansion 1.4.7
Audio Plus
Autosave
Blackrock Drive Yards
Combat Alarm Sounds
Combat Chatter
Common Radar
DIABLEAVIONICS
DisassembleReassemble_v0.10
DynaSector
Foundation Of Borken
Galatia Complete
GraphicsLib
Interstellar Imperium
LazyLib
Leading Pip
Looters
Metelson
Neutrino corp
New Galactic Order 1.06b
Nexerelin
Portrait pack
Rebalanced Pilums
Ship and Weapon Pack
Templars
The Vass
Tiandong Heavy Industries 1.1.2
Tore Up Plenty
Underworld
UnknownSkies
UpgradedRotaryWeapons
OK, I can tell you your problems quite easily my friend.
Allocate 6 gigs of ram, not 4, you have 16 total in your system anyways. Do not modify the Xss parameter either. So your pertinent section of vaparams will look like this:
-Xms6144m -Xmx6144m -Xss1024k
That is a lot of mods and your problem is likely three fold. Not enough allocated ram and messing with Xss, and here is the kicker. You have a video card with 2 gigs of vram when your mod list will use approximatley 1750 + the operating system itself and any other programs you use will go over 2 gigs fairly easily.
So you need to remove some mods or disable GraphicsLib shaders. Whatever you prefer, less content or less eye candy but you *must* reduce vram usage along with the vparams changes I recommended.
Also Tiandong is made compatible with 8.1 by me and works OK. But all of this are just irrelevant things.
I uh really, don't care to imagine all the possible problems you created by doing a simple update of THI to make it "work" in 0.8x...