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8500/8600/GT/GTS Mod guide...

Solaris17

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osunds good man cant wait tilll you start clocking :)
 
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sweet the cooler I had on my x1800xl fits my 8600gt nicely!
 

asb2106

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ok solaris - heres what I got,

what should I increase to get it up some more???......

I tried a few things and I run into alot of problems


I have no clue on how to OC Nvidia, Ive always had ATI. But Im really liking these results for a card that you can get from Bestbuy for 220 bucks!
 

Solaris17

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try mem at 1000 or 1050.
 

asb2106

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try mem at 1000 or 1050.
trying that now,

I have been trying to decrease the Shader and upping the core, and the drivers fail
 

Solaris17

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ya 730 740 is usually the limit wihtout the vmod.
 

asb2106

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ya 730 740 is usually the limit wihtout the vmod.
ok, that would make sense, after about 8 tries I cannot get a touch past 740, funny that I chose that as my first OC and it was stable as a rock

this is my highest score I have gotten yet
 
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Solaris17

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see memory does alot ;) good job buddy amazing :)
 
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sweet huh?
And I still haven't flashed the bios you gave me Solaris17
I'll post card pics later

 

Solaris17

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that is amzing my props go out to you :D :toast:
 
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here are some pics of the card:
srry about the quality(cell phone cam)



 

wolf

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hey scirzz or solaris, do either of you know where vGpu measure points are on the XFX 8600GT pcb? cos i'd really like to know the exact changes going on with the pencil mod.

also im picking up some 20k variable resistors today, so i'd love to know the solder points for those too :D
 
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hey scirzz or solaris, do either of you know where vGpu measure points are on the XFX 8600GT pcb? cos i'd really like to know the exact changes going on with the pencil mod.

also im picking up some 20k variable resistors today, so i'd love to know the solder points for those too :D
nope, srry. I've just been going blind lately(sold my multimeter) :shadedshu

@Solaris17: I too would be interested in knowing the solder points, and measurement points :D
 
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I just got the same cart the xfx 8600GT XXX would like to know more about it myself
 

Solaris17

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ill work on it give me a couple days..any high rez images of the back of the card will help.
 
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lol i can try all i got is a web cam from the early 90's its a huge dino
 
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hey Solaris, would you be able to help with a 8800gs aswell?
I'm thinking about getting myself one.
 

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hopefully i can ninja my sisters 10m/pixel digital SLR with macro lens for some sweet pcb shots.

oh and i also have 2x20k VR's ready to go solaris if you mind nething. if it helps the pics u used for the pencil mod to help scrizz and i are the pcb's we have.
 

Solaris17

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sry wolf i didnt quite follow what about the pics i sent you?
 
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he's trying to say "can you please show us where the measuring and soldering spots are? The pcb is the 8600gt xxx edition(same one you used to show us pencil points)"

thx
 

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spot on man :D
 

coder0xff

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evga 8600 gts vmod?

I am pretty new to oc'ing, but I fiddled around with rivatuner and nibitor for a several hours.

Figured out that there is a voltage setting above 1.3 but nibitor displays it as ?.?V, so I added it with the voltage table editor. Think it's about 1.45V (from browsing other threads), but I don't have a multimeter. Anyway, got it up to 810/1730/1210 (not sure if it's entirely stable though).

I saw the images for the pencil mod and decided to print them out and pulled out my card. The pcb layout, though similar, was still different enough to keep me from doing the mod. I'm pretty good with electronics (theory at least) and I'm wondering how on earth people even figure out what and how to mod without some schematics and signal path diagrams. If anyone knows how to adapt the mod for the evga 8600 gts, that would be great.

Another question- Do bios voltage settings still have any effect when the pencil mod is used? I guess it probably would make a slight difference, but nothing significant.

Thanks
 

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Hi man, i've read your tutorial and i've found it very interesting.

I was trying to squeeze all the power i could from my Pov 8600GT 512Mb.
I've managed to reach 790 core and 1700 shaders (better not to talk about the DDR2 memory, they only reach 470 in overclock:cry:) and i was wondering if, raising a bit the Vcore, i could get a litle bit more.

I would like to use Nibitor to modify the bios and then reflash it.

This are the two voltages tabs in Nibitor:



In the first menu, the only available choice is 3D, that has no setting by default.
Must i choose 1,32 and save?
Or must i go to the VID mode and substitute 1,2 with 1,32 in the 1,2V choice?

Or must i do something different?

Thanks for all the help and the experience that you would like to grant me.

Cheers.
 

Solaris17

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Hey man glad your intrested...you may be able to get a little bit more out of that ram...however the voltage tables you can modify in the bios i have found help protect against over current and over voltage protection however if you pencil it it should work like a charm..im glad you learned form the article and will be more than happy to assist you :)
 

Badtzmaru

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Hey man glad your intrested...you may be able to get a little bit more out of that ram...however the voltage tables you can modify in the bios i have found help protect against over current and over voltage protection however if you pencil it it should work like a charm..im glad you learned form the article and will be more than happy to assist you :)
Hope it is not something forbidden, to link "competitor" forums :p

As you can see here, i've allready asked about vmods and the only one that seems to be possible is the Vmem one.

Vcore seems to be unavailable on my 8600 but i'd prefer to modify the bios anyway.
I don't have a multimeter and via bios the mod is permanent. Since it's not possible to stretch ram any further, i'd like to stretch the gpu and with an extra 0,1Volts, i might be able to reach 800Mhz core stable.

So, which is the correct way to boost the voltage via Nibitor?
Is it enough if i choose "3D: 1,32V" in the exact mode and then flash it?

Thanks for the kindness shown, cheers :)