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I found on a GRAW 2 Tweak guide how to enable the Physics without a PPU. So I have a couple of questions.
Since I have a 9800GTX with the new 177.41 Drivers which have Physics support why can't I enable the High or Extreme Physics in the Video options in the menu? I can Load the Ageia Island but it runs at very slow 6-8 FPS no matter what res or Video options I have turned down. So If I can load that demo Island which is supposed to be for PPU user only why are the Physics options still grayed out in the menu?
Now for my next Question. I do know how to enable the High or Extreme Physics with the Tweak provided in the Tweakguide, So what are the differences between the two settings of High or Extreme Physics? I have been looking around but can't seem to find any detailed description of what the Differences are. When I load Either setting I can't tell the Difference when Playing a level except for the Bigger Performance hit when using the Extreme setting. But I am trying to optimize the Settings So I can play the Campaign with a nice smooth Frame rate.

BTW, For anybody trying to enable these High or Extreme settings there is a added trick to get them to work properly. Once you have changed the files in the GRAW 2 folder and have loaded the Game, Don't hit apply in the menu just yet. I have found if you load a level then go into the menu and change anything in you video Settings except the Physics settings then hit apply you get the physics to run a lot smoother. For some reason if you hit 'Apply' in the menu before you load a level I get a slide show in terms of performance, But when you do it the way I just said it seems to trick your Rig to run smoother. The difference for me is, I get about 7-9 FPS if I hit apply before loading a level and about 35-40 FPS if I hit Apply after loading a level!! Don't ask me why this works but it does. I tried each way numerous times to be sure.
But back to my questions. Why are the options still grayed out?
And what are the differences between the two settings of High and Extreme Physics?
thanx for any help people. If anybody needs to read up on how to enable the Physics in GRAW 2 with out the PPU Via the tweak have a read at,
http://www.tweakguides.com/GRAW2_7.html
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Bushwicks Rig
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel 2600K ASUS P8P67 PRO Gigabyte GTX 570 Super Overclock 2x4GB sticks Kingston 
Hard DriveOptical DriveOSMonitor
240gb SSD kingston hyper x 3, Two 750GB Hard dr... LG 18X windows 8.1 64 Bit Acer 24"Widescreen P243W And a Samsung 27 3d Ga... 
KeyboardPowerCaseMouse
Logitech cooler master 700w Antec 300 R.A.T. 7 
Audio
Denon AVR-E400 , Enegy Take 2 Classic 7.1 
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