FSX CONFIG - A MATHMATICAL APPROACH based on hardware specifications
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Thread: FSX CONFIG - A MATHMATICAL APPROACH based on hardware specifications

  1. October 27th, 2010, 15:25 #1
    TWISTFISH
    Guest

    FSX CONFIG -TWISTFISH METHOD Based on Hardware Bandwidth//Revised

    Like many of you I have been tinkering with the FSX.cfg file, plugging in numbers based on the popular tweaks found on the internet. Most of the tweaks I have found list values to be put into the FSX.cfg file, based on the authors' "trial & error" method of seeing what was too high a value or too low a value. While I appreciate the work these people have put into beta testing these numbers, the one thing that was lacking for me to gain understanding of these values was the mathematics behind it all.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
    <o></o>
    While working a nightshift last night I was about to doze off so at <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-comffice:smarttags" /><st1:time Minute="0" Hour="3">3am MST</st1:time> I drank a 5 hour energy drink. Check Chemist Warehouse Catalogue on Catalogue AU. Arriving home 2 hours later I was physically exhausted but wired...the following is the result of crunching numbers in the wee hours of the morning...

    <o><o></o>
    <o>
    <o></o>
    <o></o>
    TWISTFISH METHOD / FSX CONFIG BASED ON HARDWARE BANDWIDTH<o></o>
    <o></o>
    1. SELECT RAM TYPE YOU ARE USING:<o></o>
    <o></o>
    <TABLE style="MARGIN: auto auto auto 4.65pt; WIDTH: 244pt; BORDER-COLLAPSE: collapse; mso-padding-alt: 0in 5.4pt 0in 5.4pt" class=MsoNormalTable border=0 cellSpacing=0 cellPadding=0 width=325><TBODY><TR style="HEIGHT: 12.75pt; mso-yfti-irow: 0"><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=87 noWrap>
    RAM Type<o></o>









    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=64 noWrap>
    GB/s<o></o>









    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 0.75in; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=72 noWrap>
    Frames/S<o></o>









    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 77pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=103 noWrap>
    Max Mb/Frame<o></o>













    </TD></TR><TR style="HEIGHT: 12.75pt; mso-yfti-irow: 1"><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=87 noWrap>
    DDR3-1600<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=64 noWrap x:num>
    38.4<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 0.75in; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=72 noWrap x:num>
    30<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 77pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=103 noWrap x:num>
    1280<o></o>













    </TD></TR><TR style="HEIGHT: 12.75pt; mso-yfti-irow: 2"><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=87 noWrap>
    DDR3-1800<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=64 noWrap x:num>
    43.2<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 0.75in; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=72 noWrap x:num>
    30<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 77pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=103 noWrap x:num>
    1440<o></o>













    </TD></TR><TR style="HEIGHT: 12.75pt; mso-yfti-irow: 3"><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=87 noWrap>
    DDR3-1866<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=64 noWrap x:num>
    45<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 0.75in; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=72 noWrap x:num>
    30<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 77pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=103 noWrap x:num>
    1500<o></o>













    </TD></TR><TR style="HEIGHT: 12.75pt; mso-yfti-irow: 4; mso-yfti-lastrow: yes"><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 65pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=87 noWrap>
    DDR3-2000<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 48pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=64 noWrap>
    48.0 <o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 0.75in; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=72 noWrap x:num>
    30<o></o>













    </TD><TD style="BORDER-BOTTOM-COLOR: #f0f0f0; PADDING-BOTTOM: 0in; BACKGROUND-COLOR: transparent; BORDER-TOP-COLOR: #f0f0f0; PADDING-LEFT: 5.4pt; WIDTH: 77pt; PADDING-RIGHT: 5.4pt; HEIGHT: 12.75pt; BORDER-RIGHT-COLOR: #f0f0f0; BORDER-LEFT-COLOR: #f0f0f0; PADDING-TOP: 0in" vAlign=bottom width=103 noWrap x:num>
    1600<o></o>









    </TD></TR></TBODY></TABLE>
    <o></o>
    <o></o>
    Given =<o></o>
    Frames Locked to 30FPS<o></o>
    <o></o>
    TEXTURE_MAX_LOAD=1024 (102,400,000)<o></o>
    <o></o>
    TextureMaxLoad=3<o></o>
    <o></o>
    <o></o>
    Settings in the FSX.cfg file calculated on the following formula.<o></o>
    <o></o>
    1. Memory Bandwidth divided by Target Frame rate of 30Fps<o></o>
    <o></o>
    = Maximum Bytes Per Frame (MAX_TEXTURE_DATA)<o></o>
    <o></o>
    2. Max Bytes Per Frame divided by TEXTURE_MAX_LOAD<o></o>
    <o></o>
    = TEXTURE_BANDWIDTH_MULT<o></o>
    <o></o>
    <o></o>
    <o></o>
    <o></o>
    <o></o>
    If you are using DDR3 1600Mhz - 2000Mhz RAM<o></o>
    Here are the settings:<o></o>
    <o></o>
    <o></o>
    <o></o>
    DDR3-1600Mhz settings:<o></o>
    <o></o>
    [Display]
    TEXTURE_BANDWIDTH_MULT=125
    UPPER_FRAMERATE_LIMIT=30
    TextureMaxLoad=3
    MAX_TEXTURE_DATA=1280<o></o>
    <o></o>
    [GRAPHICS]
    TEXTURE_MAX_LOAD=1024<o></o>
    HIMEMFIX=1
    <o></o>
    The Math:<o></o>
    <o></o>
    TextureMaxLoad=3
    MAX_TEXTURE_DATA=1280
    MAX_TEXTURE_DATA= (102.4Mb * (TextureMaxLoad * 125) /30
    M_T_D= (102.4M * (3 *125) /30
    M_T_D= (102.4M * 375) /30
    M_T_D= (38,400,000,000) / 30
    M_T_D= 1,280,000,000<o></o>
    <o></o>
    <o></o>


    DDR3-1800mHZ SETTINGS<o></o>
    <o></o>
    [DISPLAY]<o></o>
    TEXTURE_BANDWIDTH_MULT=140
    UPPER_FRAMERATE_LIMIT=30
    TextureMaxLoad=3
    MAX_TEXTURE_DATA=1440<o></o>
    <o></o>
    [GRAPHICS]
    TEXTURE_MAX_LOAD=1024<o></o>
    HIMEMFIX=1
    <o></o>
    The Math:<o></o>
    <o></o>
    TextureMaxLoad=3
    MAX_TEXTURE_DATA=1440
    MAX_TEXTURE_DATA= (10.24Mb * (TextureMaxLoad * 140) /30
    M_T_D= (102.4M * (3. *140) /30
    M_T_D= (102.4M * 422) /30
    M_T_D= (43,200,000,000) / 30
    M_T_D= 1,440,000,000<o></o>
    <o></o>
    <o></o>
    DDR3-1866mHZ SETTINGS<o></o>
    <o></o>
    [DISPLAY]<o></o>
    TEXTURE_BANDWIDTH_MULT=146
    UPPER_FRAMERATE_LIMIT=30
    TextureMaxLoad=3
    MAX_TEXTURE_DATA=1500<o></o>
    <o></o>
    [GRAPHICS]
    TEXTURE_MAX_LOAD=1024<o></o>
    HIMEMFIX=1
    <o></o>
    The Math:<o></o>
    TextureMaxLoad=3
    MAX_TEXTURE_DATA=1500
    MAX_TEXTURE_DATA= (10.24Mb * (TextureMaxLoad * 146) /30
    M_T_D= (102.4M * (3 *146) /30
    M_T_D= (102.4M * 439.45) /30
    M_T_D= (45,000,000,000) / 30
    M_T_D= 1,500,000,000<o></o>
    <o></o>
    DDR3-2000Mhz SETTINGS<o></o>
    <o></o>
    [DISPLAY]<o></o>
    TEXTURE_BANDWIDTH_MULT=156
    UPPER_FRAMERATE_LIMIT=30
    TextureMaxLoad=3
    MAX_TEXTURE_DATA=1600<o></o>
    <o></o>
    [GRAPHICS]
    TEXTURE_MAX_LOAD=1024<o></o>
    HIMEMFIX=1 <o></o>
    <o></o>
    The Math:<o></o>
    <o></o>
    TextureMaxLoad=3
    MAX_TEXTURE_DATA=1600
    MAX_TEXTURE_DATA= (10.24Mb * (TextureMaxLoad * 156) /30
    M_T_D= (102.4M * (3 *156) /30
    M_T_D= (102.4M * 469) /30
    M_T_D= (48,000,000,000) / 30
    M_T_D= 1,600,000,000<o></o>
    <o></o>
    <o></o>
    <o>Try these settings in conjunction with your preferred BUFFERPOOLS setup.</o>
    <o>Mine is</o>
    <o></o>
    [BUFFERPOOLS]
    usepools=1
    Poolsize 200000000
    RejectThreshold=524288


    Let me know how this works out for y'all....</o>
    </o>
  2. October 27th, 2010, 22:39 #2
    Naismith
    Naismith is offline
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    I tried some of your settings with pretty reasonable results. However I found the UPPER_FRAMERATE_LIMIT=30 caused micro stutters and occasional flashes of pixelation (small colored squares in the sky) so I reduced it to 24 and found that microstutters went away. I would point out that I was running the sim in a very heavy scenery area. Installed scenery includes FSGlobal, UTerrain, UTraffic2, Vancouver+ and PNW also some 3rd party AI.
    My DDR3 is 1600 whatchamacallits.
    Overall I like it.
    One thing, is the line
    HIMEMFIX=1
    or
    HIGHMEMFIX=1
    I have seen both and was using the second one until I saw your post.
    Here are my relevant settings.

    [Display]
    ChangeTime=4.000000
    TransitionTime=4.000000
    ActiveWindowTitleTextColor=255,255,255
    ActiveWindowTitleBackGroundColor=0,28,140,64
    NonActiveWindowTitleTextColor=255,255,255
    NonActiveWindowTitleBackGroundColor=24,33,87,64
    InfoUpperRightTextColor=255,0,0
    InfoUpperRightBackGroundColor=0,0,0,0
    InfoLowerLeftTextColor=255,255,255
    InfoLowerLeftBackGroundColor=255,0,0,128
    InfoLowerRightTextColor=255,255,255
    InfoLowerRightBackGroundColor=255,0,0,128
    InfoBrakesEnable=True
    InfoParkingBrakesEnable=True
    InfoPauseEnable=True
    InfoSlewEnable=True
    InfoStallEnable=True
    InfoOverspeedEnable=True
    BLOOM_EFFECTS=0
    SKINNED_ANIMATIONS=1
    //TEXTURE_BANDWIDTH_MULT=70
    TEXTURE_BANDWIDTH_MULT=125
    UPPER_FRAMERATE_LIMIT=24
    TextureMaxLoad=3 //test setting 27oct
    MAX_TEXTURE_DATA=1280 //test setting 27oct
    WideViewAspect=True
    //pan_rate=200 //test
    [Main]
    DisablePreload=1
    User Objects=Airplane, Helicopter
    SimObjectPaths.0=SimObjects\Airplanes
    SimObjectPaths.1=SimObjects\Rotorcraft
    SimObjectPaths.2=SimObjects\GroundVehicles
    SimObjectPaths.3=SimObjects\Boats
    SimObjectPaths.4=SimObjects\Animals
    SimObjectPaths.5=SimObjects\Misc
    SimObjectPaths.6=SimObjects\UT2 Aircraft
    SimObjectPaths.7=SimObjects\Testing
    SimObjectPaths.8=SimObjects\Ai_Other
    SimObjectPaths.9=ORBX\FTX_AU\FTXAI_AIRCRAFT
    Maximized=0
    Location=320,115,1360,893,\\.\DISPLAY1
    HideMenuNormal=0
    HideMenuFullscreen=1
    ProcSpeed=5895
    PerfBucket=7

    [GRAPHICS]
    TEXTURE_MAX_LOAD=1024
    HIGHMEMFIX=1 //Test setting
    HIMEMFIX=1 //Test setting 27oct

    [JOBSCHEDULER]
    AffinityMask=14 //15

    [BUFFERPOOLS]
    //PoolSize=70000000
    //UsePools=0
    //RejectThreshold=126976 //98304 //524288 //262144
    usepools=1 //test 27oct
    Poolsize 200000000 //test 27oct
    RejectThreshold=524288 //test 27oct
    Intel i5-10600K 4.10 GHz 12 Core CPU
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  3. October 28th, 2010, 07:40 #3
    TWISTFISH
    Guest

    Highmemfix flag

    I had this entry incorrect in my first post..
    The correct entry is this:

    [GRAPHICS]
    HIGHMEMFIX=1

    Sorry for the mixup!
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