GTX285 various mods.. which may work for GTX260/280/295 also

Quote:

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Originally Posted by NapalmV5

you got to do step 2





:up: ocp mod


i gained @ 10k ohm resistor/i gained @ 1k ohm resistor/use whatever fixed resistor you got between 10 ohm and 1000 ohm

sure you can try a 100 ohm resistor @ step 3

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Thanks for clarification.
I did step 2; now my resistance is 7 kohm but my voltage with Napalm mods 1-2-3 done is 1.285 V.

I will try to reduce to 100 ohm the resistance of mod 3 and reduce to 22 ohm the ocp mod.

I let you know. :)

I have modified the 2 resistances: 100 ohm for mod #3 vgpu and 22 ohm for OCP.

The Vgpu raised to 1.31 V but unfortunately the OCP protection is triggering the solid color screen very often.

I checked many times the soldering and connection and everything seems good.

I wonder why the OCP is triggered with such a low resistor value (22 ohm).

Tomorrow I recheck everything and I will try 10 ohm. :confused:

Quote:

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Originally Posted by der8auer

Hey Guys :)

i need a vgpu mod and maybe ocp mod for my Inno3D GTX285. PCB is rev2 like the EVGA Vanilla. http://www.xtremesystems.org/forums/...&postcount=461

Found OCP here: http://www.xtremesystems.org/forums/...&postcount=498

But still looking for vGPU Mod :/

Would be great if you could help me with it :)

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rev2 vgpu mod already posted @ crotales thread

sorry i wont post anymore vmods

heres updated rev2 ocp mod
http://i47.tinypic.com/jg40pd.jpg
pic by chispy :toast:

Quote:

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Originally Posted by Brama

I have modified the 2 resistances: 100 ohm for mod #3 vgpu and 22 ohm for OCP.

The Vgpu raised to 1.31 V but unfortunately the OCP protection is triggering the solid color screen very often.

I checked many times the soldering and connection and everything seems good.

I wonder why the OCP is triggered with such a low resistor value (22 ohm).

Tomorrow I recheck everything and I will try 10 ohm. :confused:

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idle or load voltages ^ ??

- step 2.. clean the area and surroundings around the resistor if you used pencil.. residue @ other components decreases vgpu

- redo step 2/lower resistor resistance down to 5k

- instead of solid screens after step 2/ocp mod you get freeze screens

step 2 worked on 2 diff 285s.. should work on other 285s aswell

idk what cooling youre doing but keep in mind temp sense also kicks in depending on the cooling/load/temp

if all else fails.. increase your cooling

good luck :toast:


and dont worry guys.. fermi is coming shortly and you wont have to bother with hard vmods anymore.. all soft :up:

Ah great, found it there :) Thanks!

Just wanted to thank NapalmV5 & the others who have contributed to the thread, lurked my way through & got my cards modded up, finally broke 30k with 2 gpus.

http://i775.photobucket.com/albums/y...es/0630666.jpg

Quote:

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Originally Posted by FtW

Just wanted to thank NapalmV5 & the others who have contributed to the thread, lurked my way through & got my cards modded up, finally broke 30k with 2 gpus.

http://i775.photobucket.com/albums/y...es/0630666.jpg

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very nice mate I7 gives you extra points...

congrats on your score, i did 25+ only one and a Q9650 my post is back some page

cheers !
Sergio

Quote:

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Originally Posted by NapalmV5

idle or load voltages ^ ??

- step 2.. clean the area and surroundings around the resistor if you used pencil.. residue @ other components decreases vgpu

- redo step 2/lower resistor resistance down to 5k

- instead of solid screens after step 2/ocp mod you get freeze screens

step 2 worked on 2 diff 285s.. should work on other 285s aswell

idk what cooling youre doing but keep in mind temp sense also kicks in depending on the cooling/load/temp

if all else fails.. increase your cooling

good luck :toast:


and dont worry guys.. fermi is coming shortly and you wont have to bother with hard vmods anymore.. all soft :up:

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Thanks again for suggestions.
Naturally I mentioned full load voltages.

I will clean the area and redo the mod #2.

Unfortunately, even with OCP mod using 22 ohm, I have solid screens, mostly completely grey and PC full locked.

This evening I try again and I hope. :)

About Fermi, it seems will be very fast but produced initially in low numbers (high price) and warm like a little oven :D

I do hope that it will mount a Volterra or similar I2c programmable VRM controller. :)

Quote:

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Originally Posted by FtW

Just wanted to thank NapalmV5 & the others who have contributed to the thread, lurked my way through & got my cards modded up, finally broke 30k with 2 gpus.

http://i775.photobucket.com/albums/y...es/0630666.jpg

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thanks/your welcome :toast:

nice sli clocks :up:

Quote:

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Originally Posted by Brama

Thanks again for suggestions.
Naturally I mentioned full load voltages.

I will clean the area and redo the mod #2.

Unfortunately, even with OCP mod using 22 ohm, I have solid screens, mostly completely grey and PC full locked.

This evening I try again and I hope. :)

About Fermi, it seems will be very fast but produced initially in low numbers (high price) and warm like a little oven :D

I do hope that it will mount a Volterra or similar I2c programmable VRM controller. :)

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:shoot: volterra

chil chl831x ;)

Quote:

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Originally Posted by NapalmV5

:shoot: volterra

chil chl831x ;)

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Good! :yepp: I read the data sheet and by sure is programmable. I hope that the nvidia reference design will use the 3 SMBus pins and not only the VID ones.

Yesterday night I spent about 4 hours to test mods on my VGA and I found:

- pencil mod #2 is not effective in my system. The resistance is 10.1 kohm and lowering it till 5 kohm I gain about 0.01 V.
- 150 ohm mod #3 is giving +0.04 V. With 100 ohm I have +0.07 V. With 70 ohm the voltage chip goes in protection mode (0.06 V).
- mod #3 seems not to consider Crotale OCP mod. I mean that if you use mod #3 to raise Vgpu, even with a 10 ohm resistor on OCP point indicated by Crotale, OCP is triggering in.



As yesterday I cooked my eyes, I am waiting for new Fermi design with a soft modifiable VRM controller. :D

Just cleaned up my gtx285 mod and I want to share. Initially I had the points bridged with solder only, but it seemed half-assed IMO.

So, this morning, I cannibalized an old sprint cell phone (circa 2001) to get some zero ohm resistors of the correct size.

Here's what I got... (blue resistors are the ones I added)

Please pardon my amateur soldering skills as well. I only have experience making rc car batteries and working on far bigger stuff.

http://i213.photobucket.com/albums/c...d/IMG_0477.jpg

http://i213.photobucket.com/albums/c...d/IMG_0474.jpg

http://i213.photobucket.com/albums/c...d/IMG_0472.jpg

From looking at it, I am guessing the soldering iron tip I used was a little too big as well. Just proximity seems to have made a mess of the pcb near the vmod.

I used a 25w cheapo weller and a pin for the mod.

I bridged 2, 4, and 5. This gave me a bridge on 1,2,3,4,5,and 11

All said and done, under load, I achieved 2.13v mem and 1.22v core with the mod. Idle is 2.11v mem and 1.05v core.

Quote:

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Originally Posted by nkresho

Just cleaned up my gtx285 mod and I want to share. Initially I had the points bridged with solder only, but it seemed half-assed IMO.

So, this morning, I cannibalized an old sprint cell phone (circa 2001) to get some zero ohm resistors of the correct size.

Here's what I got... (blue resistors are the ones I added)

Please pardon my amateur soldering skills as well. I only have experience making rc car batteries and working on far bigger stuff.


From looking at it, I am guessing the soldering iron tip I used was a little too big as well. Just proximity seems to have made a mess of the pcb near the vmod.

I used a 25w cheapo weller and a pin for the mod.

I bridged 2, 4, and 5. This gave me a bridge on 1,2,3,4,5,and 11

All said and done, under load, I achieved 2.13v mem and 1.22v core with the mod. Idle is 2.11v mem and 1.05v core.

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Good idea, using 0 ohm resistors. :)
To have some tenth of mV more, you can try to solder the 12 bridge too, but with the right solder. ;)

Quote:

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Originally Posted by nkresho

Just cleaned up my gtx285 mod and I want to share. Initially I had the points bridged with solder only, but it seemed half-assed IMO.

So, this morning, I cannibalized an old sprint cell phone (circa 2001) to get some zero ohm resistors of the correct size.

I used a 25w cheapo weller and a pin for the mod.

I bridged 2, 4, and 5. This gave me a bridge on 1,2,3,4,5,and 11

All said and done, under load, I achieved 2.13v mem and 1.22v core with the mod. Idle is 2.11v mem and 1.05v core.

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Welcome nkresho to this nice thread !!!

Good luck on your mod :up:
Sergio

Quote:

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Originally Posted by Brama

Good idea, using 0 ohm resistors.
To have some tenth of mV more, you can try to solder the 12 bridge too, but with the right solder.

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Thanks. I did have solder bridges on it, but I think this looks so much better. They were kinda blobby looking.

Thanks for the tip, but I think I am going to keep it where it is for now. I don't expect to get much more of a gpu overclocking itch any time soon. I'm really happy :D with where my system is at the moment. I know that's not the "Xtreme Systems" thing to say...:ROTF:

It's working perfectly for my needs. I am running FTW flashes on both cards. I can get them up to 780 core-1687 shaders-1440 mem

They're under full cover koolance blocks, in a dedicated gpu loop, so heat won't be a problem.

Quote:

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Originally Posted by andressergio

Welcome nkresho to this nice thread !!!

Good luck on your mod :up:
Sergio

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Thanks andressergio :up:

Guys, quick question - I picked up a used 285 with the step one mod already bridged. However, once I get past a certain clock (774/1620/1404), I get a solid color screen under load. My temps are acceptable, top out at 52c with crysis. No artifacts or anything, just a solid color screen out of nowhere, windows does not freeze. any ideas? I think this may be OCP, right?

Quote:

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Originally Posted by Kain665

Guys, quick question - I picked up a used 285 with the step one mod already bridged. However, once I get past a certain clock (774/1620/1404), I get a solid color screen under load. My temps are acceptable, top out at 52c with crysis. No artifacts or anything, just a solid color screen out of nowhere, windows does not freeze. any ideas? I think this may be OCP, right?

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Right, you need OCP mod. ;)

Well I penciled it down to 8k ohms and then to 7k ohms, yet my load Vgpu is still 1.215v...

Yep, 5k and still 1.215v. Any ideas?

Step 1 is bridged with conductive ink (how I got it), but there is no resistance between the pins... I can re do it with solder, but i'm lazy and am pretty sure that's not the cause.

some 285s dont gain as much as others from step 1

still give solder a shot :up:

lazy?? no gain!! :)

- remove the ink
- leave it as is and measure vgpu @ load
- solder vacancies @ 1/2/3/4/11/12
- measure vgpu @ load

Quote:

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Originally Posted by NapalmV5

some 285s dont gain as much as others from step 1

still give solder a shot :up:

lazy?? no gain!! :)

- remove the ink
- leave it as is and measure vgpu @ load
- solder vacancies @ 1/2/3/4/11/12
- measure vgpu @ load

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I'll try it out tomorrow, but even if it wasn't a good connection - why does lowering the resistance of the resistor not have any effect on Vgpu? From stock (9.8k ohms) to 5k, it stayed at 1.215v...

^ you tell me kain/anyone.. cause i certainly didnt use magic pencil @ step 2 to increase vgpu.. just your ordinary #2 pencil

1st 285 i got .05v increment
2nd 285 i got .08v increment

anyways.. if step 2 doesnt work for you..

heres the new step 2 vgpu mod

step #2
- for those of you that dont want to do step 1
- bridge 2 vacant from factory
http://img194.imageshack.us/img194/1438/84578361.png

- for those of you that dont want to do step 1
- 1/2/3/11 bridged from factory
http://img30.imageshack.us/img30/497/50058809.png

- for those of you that still want to do step 1
- for those of you not gaining much @ step 1
- for those of you that have already done step 1 and want to take it a bit further
- 1/2/3/4/11/12 bridged
http://img194.imageshack.us/img194/8233/92925480.png

Very interesting.
On WE I decided to try Crotale voltmod but if it fails or I am not completely satisfied, I will try your new step #2. :)

its not a new vmod.. been posted for a year over here

http://www.xtremesystems.org/forums/...0&postcount=66

Resoldered the connections, still 1.215-1.216v under load... darn darn

Quote:

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Originally Posted by Kain665

Resoldered the connections, still 1.215-1.216v under load... darn darn

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I see that you are enough skilled with the solder, so I suggest Crotale mods that seem to work on every 285s.