nvidia - poor performance

Hi,
I have an Nvidia (GF 108) GeForce 440, and I'm using the experimental 310 propietary driver on Ubuntu 12.10.

I have a dual boot machine, and the other OS is Arch Linux. The proprietary nvidia 310 works phenomenally in Arch, but in Ubuntu everything seems to be a bit slow.

I'm testing Counter Strike in Steam and the frame rate is really slow - I don't know the actual frame rate, but game-play is choppy. It's better after configuring /etc/X11/xorg.conf with gksu nvidia-settings and rebooting, but still not acceptable.

Lastly, I had earlier versions of Ubuntu on this same machine a few years ago, and when I installed the proprietary drivers, Ubuntu really *snapped* :) ... not getting the same lovin' now.

I do these and get the following results:
lspci -k and get

Code:

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01:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 440] (rev a1)
    Subsystem: Device 196e:0825
    Kernel driver in use: nvidia
    Kernel modules: nvidia_experimental_310, nouveau, nvidiafb

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sudo nvidia-detector

Code:

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none

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$ cat /etc/X11/xorg.conf

Code:

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# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 304.51  (buildd@aatxe)  Fri Oct 12 12:54:02 UTC 2012

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 310.14  (buildmeister@swio-display-x86-rhel47-11)  Tue Oct  9 12:15:25 PDT 2012

Section "ServerLayout"
    Identifier    "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option        "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier    "Mouse0"
    Driver        "mouse"
    Option        "Protocol" "auto"
    Option        "Device" "/dev/psaux"
    Option        "Emulate3Buttons" "no"
    Option        "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier    "Keyboard0"
    Driver        "kbd"
EndSection

Section "Monitor"
    Identifier    "Monitor0"
    VendorName    "Unknown"
    ModelName      "VIZ M320NV"
    HorizSync      31.0 - 70.0
    VertRefresh    50.0 - 77.0
    Option        "DPMS"
EndSection

Section "Device"
    Identifier    "Device0"
    Driver        "nvidia"
    VendorName    "NVIDIA Corporation"
    BoardName      "GeForce GT 440"
EndSection

Section "Screen"
    Identifier    "Screen0"
    Device        "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option        "Stereo" "0"
    Option        "metamodes" "nvidia-auto-select +0+0"
    SubSection    "Display"
        Depth      24
    EndSubSection
EndSection

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