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Thread: NiBiTor 2.7 screenshots of 7900GT/GTX bios clocks

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    Talking NiBiTor 2.7 screenshots of 7900GT/GTX bios clocks

    In light of this revelation at http://www.xtremesystems.org/forums/...ad.php?t=92853 that some manufacturers have different geometric delta clocks for their cards, i thought i'd download latest NiBiTor 2.7 and the current 7900GT/GTX bioses and see what clocks they have

    7900GTX

    eVGA 7900GTX Superclocked rev1


    eVGA 7900GTX Superclocked rev2


    Gigabyte 7900GTX


    MSI 7900GTX


    PNY 7900GTX


    PNY 7900GTX OC


    XFX 7900GTX


    XFX 7900GTX E


    XFX 7900GTX XE







    ======================
    7900GT

    POV 7900GT


    Galaxy 7900GT


    XFX 7900GT


    XFX 7900GT EE


    XFX 7900GT XE


    XFX 7900GT XXX



    eVGA 7900GT


    eVGA 7900GT SC rev1


    eVGA 7900GT SC rev2


    Leadtek 7900GT


    seems nearly everyone adhered to 50mhz and 20mhz delta for 7900GTX and 7900GT respectively except XFX

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    XFX =
    Team.AU
    Got tube?
    GIGABYTE Australia
    Need a GIGABYTE bios or support?



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    hehehehe XFX rulezzz

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    I'm a noob, what exatcly does that mean? Please explain as I was just about to order a XFX 7900GT EE.

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    Quote Originally Posted by tranceaddict
    I'm a noob, what exatcly does that mean? Please explain as I was just about to order a XFX 7900GT EE.

    http://www.xtremesystems.org/forums/...ad.php?t=92853


    acording to what ppl saying XFX overclok the cards but lower the geometric delta or pt to 0 like this :

    XFX 7900GTX -------------690Mhz core----------delta = 15 ------705Mhz

    other 7900GTX -------------650Mhz core --------delta = 50 -------700Mhz

    other 7900GT card --- 530MHz core --------- delta = 20 -----550Mhz

    XFX 7900Gt card ---------550 mhz core --------- delta = 0 ----- 550Mhz


    My XFX 7900 EXtreme (520/1500) ------delta = 0 ( i can get with coolbites 565/570---1800)
    Last edited by mascaras; 03-16-2006 at 06:26 PM.

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    Ok I understand the delta clocks, and thats pretty lame of XFX to do. But I don't understand the point of nvidia having delta clocks, when they already have a 2d and 3d mode. So does the core clock on a standard 7800gtx for example then vary from 650mhz core to 700mhz core while running 3d appz? wouldn't it then be better (especially for benching) to have a 0 delta clock and run the card at the highest stable clock speed?
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    So does the evga do 740?

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    Quote Originally Posted by Coroner Kyle
    So does the evga do 740?
    maybe not http://www.nvnews.net/vbulletin/showthread.php?t=66127 ????

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    thats why i say this is nothnig to do with cloks , miine come 520 -----dealta = 0 for your counts im ony be able to do 530 and i get 570Mhz , so i think this are not OK

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    Quote Originally Posted by Fhqwhgads6680
    Ok I understand the delta clocks, and thats pretty lame of XFX to do. But I don't understand the point of nvidia having delta clocks, when they already have a 2d and 3d mode. So does the core clock on a standard 7800gtx for example then vary from 650mhz core to 700mhz core while running 3d appz? wouldn't it then be better (especially for benching) to have a 0 delta clock and run the card at the highest stable clock speed?
    No it depends on how high your other domaints can go ,It's better to have all of them @550 then 550 made from 500+50 delta where only for geomtry clock will be 550 and Rop and Shader 513But in most cases to add delta is better ,cos shader and rop jump in 27mhz and can't be handled ,but geomtric can go higher.Every card must be test ,how much delta will be optimal.
    Last edited by DStealth; 03-16-2006 at 09:50 PM.
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    Who cares about clocks. Try to set higher volts.

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    Quote Originally Posted by Fhqwhgads6680
    So does the core clock on a standard 7800gtx for example then vary from 650mhz core to 700mhz core while running 3d appz?
    For the last time, to clear up all the confusion on "delta clock" once and for all:
    GF7 have 4 different clocks for 4 different parts of the chip.
    delta clock is just how much faster the geometry clock is.

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    Why the harping on XFX? XFX is good. They probably lowered the delta's just to cover their ass with the pre overclock. I bet it doesn't mean anything and I'll test it out tommorow. It might not even artifact if you change it back to 50....but they don't ship it as so since it MIGHT and they'd look bad.

    XFX's overclock great.

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    Quote Originally Posted by eva2000
    So are the OC'ed cards still locking up? I've only read through half of that thread.

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    Quote Originally Posted by Kasparz
    Who cares about clocks. Try to set higher volts.
    haha, exactly
    . . . WHO put this thing together? ME !

    . . . WHO do i trust? ME !

    . . . f*** it, as****

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    Side note...

    Anyone check to see if changing the voltage in Nibitor works on the 7900 GTX?

    I'd try it, but my pc is down..
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    Thanks EVA2000, I now understand what that other guy at guru3d was trying to say.

    I'd have to say as well that I fall into the camp of thinking that I'd rather have a card with a low delta like XFX because you would not want to limit your shader and rops by the geometry clock max limit being hit first ..better to have a more balanced increase on all.

    Regards

    Andy

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    i got some really funny result....
    will post it later or tomorrow!

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    Quote Originally Posted by guess2098
    i got some really funny result....
    will post it later or tomorrow!
    Compare of 0 gdc vs gdc added ?

    I am curious to your findings.

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    Quote Originally Posted by CRUSH-ER
    Why the harping on XFX? XFX is good. They probably lowered the delta's just to cover their ass with the pre overclock. I bet it doesn't mean anything and I'll test it out tommorow. It might not even artifact if you change it back to 50....but they don't ship it as so since it MIGHT and they'd look bad.

    XFX's overclock great.
    Well it can be seen as a move to show their cards as the fastest in the market *on paper*, something is true but only 10mhz in the best case (XFX 7900GTX XXX Ed 690+15 = 705, another is 650+50 = 700; XFX 7900GT XXX Ed 560, other 530+20 = 550).

    But on the other side, as zawelke says, I prefer to have a delta of 0 so you're sure the card runs fullspec all the times
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    There seems to be some confusion as to what the delta clock does. The delta clock specifies the number of MHz that the geometry portion of the core runs faster than the shaders and ROPS. Thus XFX arnt being sneaky at all.

    XFX 7900GTX XE runs 690 with 15MHz delta core 875 mem. This means:

    Shader/ROP Clock 690MHz
    Geometry Clock 705MHz
    Mem Clock 875MHz

    Gigabyte 7900GTX run 650 with 50MHz delta clock 800 mem. This gives:

    Shader/ROP Clock 650MHz
    Geometry Clock 700MHz
    Mem Clock 800MHz

    Hence the XFX cards should be faster, unless the geometry clock is the limiting factor then all cards will perform the same as there is only a 5MHz difference between the two.
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    Thanks for the acclaration Atomicpineapple. That's the best explanation I've found about delta clocks
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    yeah i overlocked the Shader/ROP clock thing - been too long with ATI X1800XT lol

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    One item to recall. The ROP/Shader clock makes jumps. On the older GTX, it was in 27 MHz increments. You would go to the closer value on the core, +/-13 Mhz.

    Using the previous example,

    at 650, the ROP/Shader should be at 648. At 690, the ROP would be 702. The delta was used to keep the core geometry clock around 40 Mhz (and at least 27 Mhz) higher than the ROP/Shader component. The new 7900 uses a 50 Mhhz delta, which makes sense, since the core clocks are just that much higher. Stock clocks are now 700-648. The EVGA SC follows the old rule, and uses 740-702. The XFX at 690 will now do just 705-702, which means the fill bandwidth may exceed the core capacity and possibly underwork the ROP/Shader cores compared to what they could really handle. Following these proportions, memory bandwidth to handle the 702 ROP/Shader should be 1.73 GHz versus the 1.6 ghz at stock. The EVGA just looks to be a little better tuned, with 690(740-702) on the core and 1760 on the memory.
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    I don't know how u guys are getting any overclocks at all?

    I'm running an EVGA 7900GT and no matter what I set in nibitor it boots to 450mhz 20% fan speed at 1.2v.

    Nvflash mybios.rom -5 -6 [ENTER] it flashes as usual successful but it stays at 20% fan and 450mhz...

    Is it a Windows 7 ultimate x64 issue?

    I'm getting better fps on a dual xeon x86 rig with 1gb ram and a 7300GT agp at 600Mhz in Windows 7 Ultimate x86....

    What's up with this...

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