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sl1982

Limp Gawd
Joined
Jul 24, 2008
Messages
365
So ive ben folding for some time now and recenty just picked up a 8800gs. Put her to folding today and holy cow. The damn thing is doing a percentage point every approx 2 mins. Got to say im damn impressed. Havnt even oc'ed the shaders yet :D



 
Am I correct in saying the 8800GS is identical tot he 9600GSO? If so what does one overclock the shaders to on this card? I have never overclocked a video card in a systematic way so i don't really know how to figure out the max OC on it. Is there a guide somewhere on folding overclocking?
 
yup.. now overclock it!!! :p


flogge said:
Am I correct in saying the 8800GS is identical tot he 9600GSO? If so what does one overclock the shaders to on this card? I have never overclocked a video card in a systematic way so i don't really know how to figure out the max OC on it. Is there a guide somewhere on folding overclocking?
Click to expand...


just keep overclocking it til it wont go any further.. and ive actually noticed with folding atleast that benchmark software doesnt work worth a damn.. because my cards unstable after 760/1825/1000 yet i can fold at 790/1880/1010(8800GT).... one these days i may just try a shader overclock only and see if i can exceed 1900mhz on my shader clock but the 790 on the gpu actually helps points wise..
 
8800gs = 9600gso (except for the crippled ones)

Approx what speed should i get out of shaders on this card?
 
start at 1700 sl1982 then work your way up from there til you notice your system lagging or you start getting EUE's.. then work your way down slowly til its stable..

or you can try running ati tool and leave the 3d view scanning for artifacts.. and raising the shader up 5 to 10 mhz every 3-4 minutes and watch for artifacts.. once you start getting artifacts then after that its your choice if you want to continue.. i get artifacts on ati tool at 740/1825/1000 though.. but i think ati tool doesnt like my 1.1v mod..
 
Code: 
Nvidia 8800/9600/9800 Series
 GPU Overclocking Step Chart
   by: Razor_FX_II
 
  Linked      Not Linked
Core  Shader    Memory
+9    +54       +9
513   1188      792
522   1242      801
531   1242      810
540   1296      819
549   1296      828
558   1350      837
567   1350      846
576   1404      855
585   1404      864
594   1458      873
603   1458      882
612   1512      891
621   1512      900
630   1566      909
639   1566      918
648   1620      927
657   1620      936
666   1674      945
675   1674      954
684   1728      963
693   1728      972
702   1782      981
711   1782      990
720   1836      999
729   1836      1008
738   1890      1017
747   1890      1026
756   1944      1035
765   1944      1044
774   1998      1053
783   1998      1062
792   2052      1071
801   2052      1080
810   2106      1089
819   2106      1098
828   2160      1107
837   2160      1116
846   2214      1125
855   2214      1134
864   2268      1143
873   2268      1152
882   2322      1161
891   2322      1170
900   2376      1179
909   2376      1188
918   2430      1197
927   2430      1206
936   2484      1215
 
Lets say your core/shader/memory is 585/1404/1602(801x2)
Start with your shader and move up to the next step - which is 1458 and set your core to linked setting which is 594 or 603.
Do your stablity test. When you find your max you may want to go down 1 step.
Then do the same thing with your memory - next step over 801 is 810. Once you find your max stable you may want to go down 1-4 steps.

8800/9600/9800 Nvidia cards move in these steps. If you set something in between the card will auto-adjust its clocks to closest step to your setting.

When you are all done you may want Un-Link your core from your shader and try moving it up step by step without moving your shader, some cards will allow higher overhead this way and some will not.
 
So when i used the nvidia system tools to put the shader at 1700 it adjusted the other frequencies as well?
 
sl1982 said:
So when i used the nvidia system tools to put the shader at 1700 it adjusted the other frequencies as well?
Click to expand...
no you are unlinking the shader from the core if you do not move the core along with the shader (linkedcore/shader = Max stablility).
If you set you shader in Ntune to 1700 the card will auto adjust its shader to 1674 or 1728 not sure which way it would go with that one.
 
Ah ok. Maybe thats why im only getting 3.4k ppd from the card. Ill try linking it up and see what i can manage. Not sure how good the cooling is on the card but i dont know if i want to drop the coin on a waterblock for a lowly 8800gs
 
If you know your card is stable at 1700 shader I would set core/shader to 675/1674 and then the next step to try would be 693/1728 then next step after that would be 711/1782
 
You can use the same chart for GTX 2xx's but the Linked core shader columns do not match.
The best way I have found to do a GTX 2xx is to use the shader step's and divide your shader by 2 to come up with your core speed (that is a shader of 1512 you can most likely set your core to 756), and the memory moves in the same steps as in the chart posted.
 
Personally, I use RivaTuner to overclock my cards and run Furmark while I'm doing it to evaluate stability. With RivaTuner, you can unlink the core and shader clocks on NVIDIA cards. This is particularly useful for Folding because the large majority of your performance gains are going to come with overclocking the shaders.
 
Parja said:
Personally, I use RivaTuner to overclock my cards and run Furmark while I'm doing it to evaluate stability. With RivaTuner, you can unlink the core and shader clocks on NVIDIA cards. This is particularly useful for Folding because the large majority of your performance gains are going to come with overclocking the shaders.
Click to expand...
Unlinking core from shader is very usefull if you are having heat issues. Find the max shader but bring the core down a few steps so the card doesn't run so hot and yet get most of the benifits from the shader for folding.
But in any regard to the overclocking software that is used the steps that these cards move in are listed in the chart. This is due to there 27mhz crystal that is on there boards.
 
sl1982 said:
Ah ok. Maybe thats why im only getting 3.4k ppd from the card. Ill try linking it up and see what i can manage. Not sure how good the cooling is on the card but i dont know if i want to drop the coin on a waterblock for a lowly 8800gs
Click to expand...

Keep in mind that the 8800gs may run around 2600 to 2800 ppd on large proteins and also as high as 4400 ppd or so on the small proteins. When looking at ppd it really matters which work unit the card is running.
 
I made up that chart about 8 months ago so I and fellow overclockers wouldn't waste so much time overclocking in 1-3 mhz steps when it wasn't really doing anything untill it jumped up to the next step.
I hope is will save you some time as it did me.
 
Razor_FX_II said:
Unlinking core from shader is very usefull if you are having heat issues. Find the max shader but bring the core down a few steps so the card doesn't run so hot and yet get most of the benifits from the shader for folding.
But in any regard to the overclocking software that is used the steps that these cards move in are listed in the chart. This is due to there 27mhz crystal that is on there boards.
Click to expand...

One issue I have noticed is the variables between different vendors of the same card. As you move up the line in both nVIDIA and ATI I’ve found many cards are way out of tollerence on the VR circuits and Caps.

This is causing some very strange over clock differentials as well as (from my own experimentation) many of the noise problems in PSUs.;)
 
BillR said:
One issue I have noticed is the variables between different vendors of the same card. As you move up the line in both nVIDIA and ATI I’ve found many cards are way out of tollerence on the VR circuits and Caps.

This is causing some very strange over clock differentials as well as (from my own experimentation) many of the noise problems in PSUs.;)
Click to expand...
Excellent point. I have seen this as well.
I use strictly BFG which I have found to be more in spec (I use the term loosly) with there tollerences, but everyone has there own preferred vender.

Edit: But my BFG 9600 GT OC2 whines like a baby when it's not under full load.
 
Thanks for providing that chart Razor. I was actually intending to look for this in the near future. :)
 
Your welcome APOLLO, I print one out for each of my cards to keep record of what I have tried and what worked and didn't.
I have seen Xilikon link to that chart when I had it posted in another forum.
You're more than welcome to put it in the guides if you like.
 
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