XFX 7900 being sneaky with delta clocks

this would indeed be very misleading, if companies were using extremely low deltas... to gain "higher" clock speeds, that really aren't all that high.

the tricky thing is, delta, really only has a small impact on actual performance on the 7800 and 7900 cards... so it would be very hard to say one card was faster then another, if the only differences was deltas.

if however, the deltas are so vastly different, like from 690/15 to 650/50 then it would be very interesting the see the actual difference in a side by side comparison by simply taking the same card, flashing it with one bios, then another, and so on... to get side by side performance differences.

it might be very interesting for people to see, that thier 690 mhz cores, really aren't any faster then a 650 mhz core, assuming the mem clock was the same between each bios to remain consistant.

by the way, you can check the Delta of a card, with Rivatuner, in the diagnostic report.
unfortunatly, rivatuner at the moment doesn't support 7900's or the 8420 drivers yet, so theres little I can do to check the delta of a bios in windows at the moment, other then actually examining various bioses.

That's why I don't buy those pre-overclocked card. ;)
They aren't worth the extra money when you can actually overclock to that level :D

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Originally Posted by Richteralan

That's why I don't buy those pre-overclocked card. ;)
They aren't worth the extra money when you can actually overclock to that level :D

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that remains to be seen actually.

if one could just flash thier card, with two different bioses... then bench them, with the same PC, and same settings and all.
a few times... then average them out.

1 bios at 650/50
2 bios at 690/15

then post up the results...
then it would become alot clearer, as to whats really going on here.

yeah i had posted b4
http://www.xtremesystems.org/forums/...&postcount=105

many companies use 690+15 = 705
and origianl nvidia is 650+50 = 700.....

for that 5 MHz you paid extra like 100USD for it just gay!!

this is all crap , like i said before so why CO version cards oercloked to 565/1800 are getting 10K in 3dmark 2005 and others non CO versions cloked to 550/1800 dont ???

and why i can get 1800MHZ so easy in memory and some normal versions cant???


link in 1st post if this was real so a non CO version at 550/1800 it was the same as a CO version at 565/1800 , so why the non CO version cloked at 550/1800 only get +- 9800marks and CO versions cloked to 565/1800 get +- 10020 marks???


my card its 520 default ----geometric delta = 0

:nono: :nono: :nono:

CO versions rulez and XFX too ;)

in fact, remove delta 50 to 0 and change core from 650 to 700 i gain more point from 05, 06. i wonder delta is like veriable number, like auto adjust overclock or something....

Quote:

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Originally Posted by mascaras

this is all crap , like i said before so why CO version cards are getting 10K in 3dmark 2005 and others dont ???

and why i can get 1800MHZ so easy in memory and normal versions cant???


link in 1st post if this was real so a non CO version at 550/1800 it was the same as a CO version at 565/1800 , so why the non CO version cloked at 550/1800 only get +- 9800marks and CO versions cloked to 565/1800 get +- 10020 marks???


my card its 520 default ----geometric delta = 0

:nono: :nono: :nono:

CO versions rulez and XFX too ;)

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there are some good clockers out there and some bad ones doesnt have anything to do with delta clock..... :slap:

i bealive the cloks are real , like if you set to 565/1800 its realy 565 and not 550 ;)


whatever , my delta its 0 so i think its OK

anyways.. to9 i am going to run one with delta and one without detla and see how it perform

becnhamrks benchmarks benchamrk , deltas , deltas , hoooah :toast: :toast:

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Originally Posted by lawrywild

that's not actually what the delta clock is.

basically 7 series cards have 4 different clocks, geometric core clock, shader core clock, ROP core clock and memory clock.

the shader and ROP run in 3d at whatever you clock them to in coolbits etc. (though they only have speedbumps every 27mhz.)

the geometric core clock is the one thats affected by the delta, it's basically the above clocks + the delta value. the geometric core clock doesnt clock in 27 mhz steps though, which is why you will see a minor increase in speeds even without going up in 27mhz steps. :)

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Exactly :toast: For those who think its 3D Mode - its not ;)
7900GTX PNY 650/1600 stock clocks with +50MHz Geom. Delta :

http://img507.imageshack.us/img507/6166/rt5jz.gif

Deltas help....but it makes sense to run your GPU at the max clocks of each clock....sometimes the geom clock is the limiting clock.

Quote:

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Originally Posted by GoriLLakoS

@eva2000 ...can you give the link of the full thread over guru3d???:D

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click link http://forums.guru3d.com/showpost.ph...postcount=1172 then in top right corner thread: has a link to full thread ;)

http://forums.guru3d.com/showthread....65#post1664365

Hmm, interesting too see this but I am not surprised the way they
went back with gdc's on the 7900's. They took the gdc's right out on the
7800 512mb core and now were back with them.
Haven't played much with my 7900gtx since I got it,
but this is good info to start on some 7900 bios edits/revisions, Thanks!.

Running 60 gdc's oppose to 50 in performance 3d lvl
helps about 100 points or so in 3D 05.

Quote:

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Originally Posted by Vapor

Deltas help....but it makes sense to run your GPU at the max clocks of each clock....sometimes the geom clock is the limiting clock.

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but if we lower the delta to regain some clock speed how much performance is to be gained?... i guess that depends on the card but i dont think the difference would be that big if anythin... if i could only find some benchmarks with different delta clocks on a 7800/7900... my 7800gtx has a delta of 50 by default and i seem to be getting decent clocks out of it without volt mods.... im hitting 510/1380 benchable... so anyone out there running lower delta at 520mhz or more on a stock 7800gtx?