Overclocking the 7800GTX

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07-12-2005, 01:34 PM
texuspete00

Quote:

Originally Posted by Cybercat

yes, with their own custom BIOS. Normal people don't get that commodity. There could be a lock, or a problem in syncronization (or lack thereof) with other elements of the chip, a throttling issue (put in there purposefully - essentially another type of lock), or....who knows.

They're practically Beta testing... don't be so jealous. :p: I feel certain changes might make it in to newer cards, and the rest of us OC'ers will flash.

I do hope they have the cold throttle at normal temps under control for reg folks anyone know? You know when your plans involve watercooling a card and you have to worry about cold throttle... that just ain't cool.
07-12-2005, 06:10 PM
Kinc

Results From "ALT-F13" (I've added the indivudual clocks):
430 - 239.4 - --- (472/432/432)
440 - 240.6 - 1.2 (480/432/432)
450 - 243.2 - 2.6 (490/459/459)
460 - 245.5 - 2.3 (500/459/459)*
470 - 246.2 - 0.7 (510/459/459)
480 - 248.6 - 2.4 (520/486/486)
490 - 249.5 - 0.9 (530/486/486)
500 - 251.6 - 2.1 (540/513/513)
510 - 252.7 - 0.9 (550/513/513)
520 - 253.3 - 0.6 (560/513/513)
530 - ----- - --- (570/540/540) <- Too high ROP/shader

*Delta seems too high here, everything else seems to make sense. My conclution of the results above is that when the geometric, shader and ROP are syncronized (460(+40)/459/459) in the best possible way, the performence is at its peak.

If you want to run all clocks att the same you can force 2D through RT or in bios and overclock from there. If you set the 2D vcore to 1.4V you should be able to reach high perfect syncronos clocks.
07-12-2005, 07:22 PM
Cybercat

Quote:

Originally Posted by texuspete00

don't be so jealous. :p:

WTF?
07-12-2005, 07:37 PM
Kanavit

Quote:

Originally Posted by Kinc

Results From "ALT-F13" (I've added the indivudual clocks):
430 - 239.4 - --- (472/432/432)
440 - 240.6 - 1.2 (480/432/432)
450 - 243.2 - 2.6 (490/459/459)
460 - 245.5 - 2.3 (500/459/459)*
470 - 246.2 - 0.7 (510/459/459)
480 - 248.6 - 2.4 (520/486/486)
490 - 249.5 - 0.9 (530/486/486)
500 - 251.6 - 2.1 (540/513/513)
510 - 252.7 - 0.9 (550/513/513)
520 - 253.3 - 0.6 (560/513/513)
530 - ----- - --- (570/540/540) <- Too high ROP/shader

*Delta seems too high here, everything else seems to make sense. My conclution of the results above is that when the geometric, shader and ROP are syncronized (460(+40)/459/459) in the best possible way, the performence is at its peak.

If you want to run all clocks att the same you can force 2D through RT or in bios and overclock from there. If you set the 2D vcore to 1.4V you should be able to reach high perfect syncronos clocks.

Kinc, what are those figures stand for? can you explain plz? thanks
07-13-2005, 11:08 AM
Kinc

Quote:

Originally Posted by Kanavit

Kinc, what are those figures stand for? can you explain plz? thanks

(550*/513**/513**)

*Geometric clock
**Shader clock
***ROP clock

ROP and Shader clock kan only work at 432, 459, 486, 513, 540, 567 etc. With an increase of 27MHz.

Ex. If u set the 3d clock to 470MHz (geometric, actuall clock is 510MHz) the shader/ROP will run at 459MHz (the nearest clock available)
07-13-2005, 07:26 PM
harleybro

Quote:

Originally Posted by Kanavit

impressive clocks, looks like Harleybro isn't having the same problems as everyone else with his 7800 gtx. :toast:

Nope all's good. It is an EVGA here's a quick 03 run using my 3500+ :D
http://service.futuremark.com/compare?2k3=4112252
07-13-2005, 07:30 PM
mr_gibs

Quote:

Originally Posted by Gryph

Is the Riva Tuner 1.57 available yet? And does it fix the overclocking issue?

Gryph

idk if we are talking about the same thing but there's version 2.0 here http://download.guru3d.com/rivatuner/
07-13-2005, 07:30 PM
Kanavit

Quote:

Originally Posted by Kinc

(550*/513**/513**)

*Geometric clock
**Shader clock
***ROP clock

ROP and Shader clock kan only work at 432, 459, 486, 513, 540, 567 etc. With an increase of 27MHz.

Ex. If u set the 3d clock to 470MHz (geometric, actuall clock is 510MHz) the shader/ROP will run at 459MHz (the nearest clock available)

thx Kinc. i think i am beginning to understand a little better now.
07-13-2005, 07:39 PM
Cybercat

What I don't understand is how performance can actually go down from overclocking. Harleybro's 3DMark05 score went down about 100 points when he went from 546 to 590. You think the current version of overclocking software simply isn't overclocking the ROP/shader clocks to coincide with the geometry clock?
07-13-2005, 07:46 PM
harleybro

Almost 200mhz. less on cpu and worse timings. Sry didn't write the info in. :)
07-13-2005, 07:49 PM
Cybercat

Oh, my mistake.
07-14-2005, 06:25 AM
Hicks

Im not sure i quite follow this.

Ive got a Gainward Golden Sample and it seems to run at a massive 520/100 without me doing anything to it? So what relation has this got with this 3 clocks thing????
07-14-2005, 07:35 AM
Kanavit

Quote:

Originally Posted by Hicks

Im not sure i quite follow this.

Ive got a Gainward Golden Sample and it seems to run at a massive 520/100 without me doing anything to it? So what relation has this got with this 3 clocks thing????

According to Kinc's figures, it looks like these are your 3 clocks.

520 - 253.3 - 0.6 (560/513/513)

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