8800gts and Source texture problem

[dark_hag666]

Just got a new system built up and wanted to have a game of CS:S.
So naturally whacked settings on high, but it was awful, FPS dropped to 15 on Dust2.

After some tweaking I've found out that its something to do with the textures and AA. If I set texture detail to high and use anything above 4x MSAA, the FPS drops on some parts of the map to 15 then other is comfortable at 140.
If I set the texture detail to medium 8x MSAA is ok but above that it does the same.

Drivers are 158.22s

System is:
e6420 @ 3.2
P5B Deluxe
2GB Crucial Ballistix
BFG 8800GTS 320MB

Anyone else had similar problems?

 

[dark_hag666]

Nope, should it be. If so should I go for multisampled or supersampled?

 

[dark_hag666]

I've also noticed that in the 'System Information' panel of the Nvidia control panel the bus is listed as a PCI Express x1....anyone else get this?

Surely if it was running at x1 speed it wouldn't work at all.

 

[dark_hag666]

I am, I have medium texture quality on, and only 4xMSAA.

 

[dark_hag666]

100-190 depending on the level. It did drop to 80ish at one point.

But the second I turn High texture quality back on it goes down to 15-25