Assassins Creed crash return to desktop

[xplosive]

Yes, i unplugged my controller.

Which values shall i try for rivaTuner? I tried the settings you said before...

[Blín D'ñero]

Have you found out how RivaTuner works? Power User. Yes reduce the mem by 100 ~200 Mhz and the gpu by 50 Mhz. That should be enough.

Also related to the crashes could be that your settings are too high. Don't forget that the 9600GT isn't a very high performance card for AC...
Also make sure: In nVidia control panel the global settings for 3D should be at application controlled. No AA / AF etc enabled in the control panel. In the game, reduce the shadows to begin with.
Also your crashes can be related to the soundchip.
You could set the hardware acceleration to basic (in stead od "none" what you have right now).
There are many voices simultaneously in the game. That is why a real surround soundcard with hardware support for DX9/10 is recommended in the system requirements list for the game. You merely have a onboard audiochip, that's below the system requirements list for the game. It is hardly capable producing a handful voices at the same time and then also the positional (3D) effect, so it easily chokes on the game.
Soundcard recommended.
At least: Creative SB Audigy SE PCI, 7.1 Surround, 24-bit/96KHz, Retail € 38,50 (OEM version € 24,95 at Computerland)
Better: Creative SB X-FI Xtreme Gamer € 88,00

[xplosive]

I think i found out how rivatuner works. Under driver settings i clicked the button Customize, than i enabled driver-level hardware overclocking. Afther that i changed the core clock down to 580MHz and Memory down to 675. i also checked the option Apply overclocking at Windows StartUp.

With AA and AF i supposed you mean Anti Aliasing and Anisotropic filtering. In the nvidia control panel i turned them all off in the global settings.

I also set my hardware acceleration back to basic.

I can play the game for about 10 minutes, and with these settings i get a BSOD:

nv4_disp.dll
0x0000008e

[Blín D'ñero]

OK, we're coming closer.
Could you try this:

In nvidia control panel if you select quality settings, fast writes need to be OFF
If you select high quality, fast writes need to be ON

[xplosive]

Never thought that bsod could be a good thing for me

But.. i suppose you mean Texture filtering Quality? If so, it is default set to Quality. But i cannot find anything that looks like fast write (not in the global setting nor the program settings). Do i need nTune for that?

[Blín D'ñero]

No it is in the BIOS of your motherboard

[Blín D'ñero]

Wait, that's for old boards. I just noticed you have an NVIDIA® 750i SLI chipset board. Do you have the latest bios for Asus P5N-D? And did you install the latest chipset drivers from the Asus support site?

[xplosive]

Yes i did 2 weeks ago a bios update: 0801 Everything went well, no errors.

I did not download drivers from the asus site. I'll try them. I used the drivers from the CD.

[Blín D'ñero]

Did you also install

Chipset Driver 15.24 for Windows 32bit XP. (2008/10/13 update)

and

NVIDIA nForce C55/MCP51 Chipset Package Driver V9.46 (Chipset Driver V4.6.0.0) for Windows XP/64bit XP.( 2008/01/09 update WHQL)

from that page?

[Blín D'ñero]

What also can't hurt is opening your PC's case and cleaning the ventilator of the videocard, maybe it is full with clogged dust?