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Thread: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

  1. #51
    Join Date
    Jul 2006
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    23

    Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    my sba is disabled cause isn't supported???

  2. #52
    Join Date
    May 2005
    Location
    Lecce, Italy
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    Ubuntu

    Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    Quote Originally Posted by fiuman View Post
    Code:
     cat /proc/driver/nvidia/agp/card
    
    Fast Writes:     Supported
    SBA:             Not Supported
    AGP Rates:       4x 2x 1x
    Registers:       0x1f000017:0x1f000114
    why in host-bridge output sba is supported and in card output is not supported???
    I wouldn't know. But it looks like it's not supported.

  3. #53
    Join Date
    Jul 2006
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    23

    Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    kk tnx

  4. #54
    Join Date
    Nov 2005
    Location
    Sicilia
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    395
    Distro
    Ubuntu 8.10 Intrepid Ibex

    Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    Nice howto, now I have Fast Writes enabled. Only one note, you don't need to restart your computer. Instead of rebooting switch to a console (Ctrl+Alt+F1), login, stop gdm (or kdm )
    sudo /etc/init.d/gdm stop
    unload the nvidia module
    sudo modprobe -r nvidia
    reload it
    sudo modprobe nvidia
    start gdm (or kdm )
    sudo /etc/init.d/gdm start
    Giuseppe Borzi' - Registered Linux user #34028

  5. #55
    Join Date
    May 2005
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    Ubuntu

    Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    Quote Originally Posted by gborzi View Post
    Nice howto, now I have Fast Writes enabled. Only one note, you don't need to restart your computer. Instead of rebooting switch to a console (Ctrl+Alt+F1), login, stop gdm (or kdm )

    unload the nvidia module

    reload it

    start gdm (or kdm )
    I know that but sometimes things just go wrong until you reboot.

    Ah... the mysteries of IT

  6. #56
    Join Date
    Aug 2006
    Location
    SoCal, USA
    Beans
    2

    Lightbulb Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    Hi Ubuntu forums!

    Mainstream Debian user here, but I have some info which you may find helpful. It seems that with most configurations, many of the steps listed here are not necessary. If you already have working 3D with AGP, simply do the following:

    Code:
    #get root
    sudo bash
    #if /etc/modprobe.d/nvidia doesn't exist, create it:
    touch /etc/modprobe.d/nvidia
    #Now add the option to enable Side-banding and FastWrites:
    echo "options nvidia NVreg_EnableAGPSBA=1 NVreg_EnableAGPFW=1" > /etc/modprobe.d/nvidia
    Basically just make a file called /etc/modprobe.d/nvidia and add the preceding line which forces fastwrites, reboot and you're done. If you want to turn it off again later, either comment out the entire line with a # to return to your system's defaults, or change the value of a specific setting from "1" to "0" to disable that feature.

    On that note, it may be worth mentioning that on my system side-band addressing was already enabled but fastwrite was disabled on my FX5900XT. In q3a timedemo four, I consistently scored exactly 1 FPS more than I did without it. So, you can see why this is disabled by default. Not exactly a mind-blowing gain in performance In fact, though this setting normally causes no stability problems, artifacts or otherwise, it did cause X not to start correctly in at least one instance.

    The bottom line: side-band addressing should give a noticable boost in FPS, but fastwrites won't necessarily help at all. Run some tests on your own rig to see if this tweak helps or hurts!

    All the best,
    -AT

  7. #57
    Join Date
    Apr 2005
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    1,467

    Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    Hi hi I moded my nvidia and it only gave me about a 20 frame increase.
    ANyways you might want to look into this benchmark how to.

    http://ubuntuforums.org/showthread.p...ight=benchmark
    Back to using Ubuntu

  8. #58
    Join Date
    Apr 2006
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    131

    Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    Thx Tseliot.
    I noticed better fps on Xgl. Tho its not a "huge" gain.

  9. #59
    Join Date
    Oct 2006
    Beans
    10
    Distro
    Ubuntu 6.10 Edgy

    Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    i did it and and now my agp is 2x not 4x like it was how do i fix it?

  10. #60
    Join Date
    Oct 2006
    Beans
    12

    Re: HOWTO:Nvidia AGP FastWrites and Side Band Addressing

    i found when trying this guide, i was unable to get fastwrite working. i discovered a setting in the mother board bios that was disabled for fastwrite. after enabling it i had fastwrite. if anyone is having that problem check your bios settings.
    nice guide tseliot, thanks for the info.
    tested on asus a7v133 with an nvidia fx5600 ultra card. i gained about 75 fps.

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