GTX285 VGPU and OCP mod

[babalouj]

For the vGPU mod; I was going to use a slightly different VR; would the numbering (and corresponding connections) be the same with this model ?

Yes, it is the same numbering. 2 being the wiper.

[trueg50]

Yes, it is the same numbering. 2 being the wiper.

Thank you very much sir.

[G4h4o8s6T]

I finally got around to try these mods today, and started with OCP.

Before I soldered on the VR it was tuned to 100k, and now after soldering it on Im getting a 20k reading between the two points...........is this normal, and if it is, how am I supposed to know what the VR is set to?

Sorry for the nubbish question, this is my first time vmodding with VRs

[trueg50]

I finally got around to try these mods today, and started with OCP.

Before I soldered on the VR it was tuned to 100k, and now after soldering it on Im getting a 20k reading between the two points...........is this normal, and if it is, how am I supposed to know what the VR is set to?

Sorry for the nubbish question, this is my first time vmodding with VRs

Any luck with this G4h4o8s6T? You should set the VR to 100k ohm then solder it down. After you solder both legs, you then proceed to tune it to maybe 15k; I think it is just measured between both legs.

I am so close to breaking the 200gb/s memory bandwidth mark, I am just dying to get the mod done and get the extra 50 mhz (ish) to break the mark.

[crotale]

I finally got around to try these mods today, and started with OCP.

Before I soldered on the VR it was tuned to 100k, and now after soldering it on Im getting a 20k reading between the two points...........is this normal, and if it is, how am I supposed to know what the VR is set to?

Sorry for the nubbish question, this is my first time vmodding with VRs

That sounds correct.

Without the VR soldered in, it has a specific resistance and the feedback circuitry has another resistance (~20-25k). When the VR is soldered in and you are measuring the resistance over the two legs the reading is the parallell resistance between the VR and the onboard resistance.

What actual resistance the VR has is not important.

[ibm390s]

just received two EVGA FTW cards few days ago and i started to tweak them. First of all installed a waterblock one one card and left the stock air cooling on the second. with this config i was able to clock both of the cards at 735MHz/1445MHz. after that i removed the air cooled card and left only the watercooled card which was able to hi 770MHz/1480MHz. Today i'll mount the second waterblock on the second card and hope that the second card will be able to keep up the clocks. In the mean time i ordered some VR's but here in romania is a PITA to obtain good electronic parts.





I hope to achieve 790-800MHz on the gpu's and 1500 for the memory with voltmods and watercooling on each card.

[NapalmV5]

crotale - ocp/vgpu mod for the 2gb 285 ?

[crotale]

crotale - ocp/vgpu mod for the 2gb 285 ?

What IC does it sport?

[NapalmV5]

i have no idea lol didnt check under the hood yet

i can say the pwm is better than that of 1gb 285 just going by loads

let me search a bit..

[Mayk-Freak]

crotale - ocp/vgpu mod for the 2gb 285 ?

Yes I also interested in.

[crio]

Post a pic of the card.The front and back of the naked car will do to trick...

[Mayk-Freak]

I don´t have the card yet, I will buy this card in the next week.

[Sebastione]

Okay i have totally fxxxx up this mod and my card wont post
I have blown both resistors that show number 3 in both pictures.
The resistor between 1 and 2 is also missing but someone said you could just use a blob of iron instead....
Would someone with good soldering skills get my card back to life and do the OCP/Vmod/Vmem Mod as well? I am offering a Aquagraphx GTX285 block (still sitting on the card ) or if you prefer a Corsair HX520.I am located in Germany though....

[Mayk-Freak]

My MSI 285GTX OC-SuperPipe 2GB

[S_A_V]

My MSI 285GTX OC-SuperPipe 2GB

Here you can find Vgpu/OCP/Vmem for this card:
http://phpbb3.ocmag.eu/viewtopic.php?f=155&t=147

[Mayk-Freak]

I thank you very much. But can you explain it a bit simplier and perhaps more objectiv? Which results can you get with this mode? Does it works?

[chispy]

Guys i got the same PCb as the 2GB model but instead its a 1GB model , eVGA vanilla new revision PCB v1.1. It looks exactly the same as Mayk-Freak pictures. I went thru the mod that SAV posted(Tx a lot SAV) (used google translate of course ) and im ready for the mod but the lowest VR that i can get on the island of Puerto Rico where i live its a 1K ohm , it is required a 100 to 300 ohms VR , it will be too risky to dial the voltage with such 1K ohms VR its a 15turn cermet ?

If pictures are needed let me know as my card is naked right now .

[Mayk-Freak]

Guys i got the same PCb as the 2GB model but instead its a 1GB model , eVGA vanilla new revision PCB v1.1. It looks exactly the same as Mayk-Freak pictures. I went thru the mod that SAV posted(Tx a lot SAV) (used google translate of course ) and im ready for the mod but the lowest VR that i can get on the island of Puerto Rico where i live its a 1K ohm , it is required a 100 to 300 ohms VR , it will be too risky to dial the voltage with such 1K ohms VR its a 15turn cermet ?

If pictures are needed let me know as my card is naked right now .

When you wish I could sent you some VRs? You only should give me your adress.

[TiN_]

chispy

You can use 1k VR, just add 100-200 ohm normal fixed resistor serial. Like this:

VR solder point <<<< Fixed 200ohm resistor <<< VR center dial pin

You will get protection from shortcurcuit on VR, if you get to the end in benching action .

[chispy]

chispy

You can use 1k VR, just add 100-200 ohm normal fixed resistor serial. Like this:

VR solder point <<<< Fixed 200ohm resistor <<< VR center dial pin

You will get protection from shortcurcuit on VR, if you get to the end in benching action .

Wow , Tx a lot glad to hear theres an easy fixed yes i can get those fixed 200ohm resistors at my local radio shack , will post results here and pics after the v.mod its done and tested.


@ Mayk-Freak , Thanks a lot very kind of you bro , appreciated much. I think i got it fixed. If it does not work maybe i will bother you for one , Thanks a million for you good intentions you are a good man.



Chispy.

[Mayk-Freak]

Wow , Tx a lot glad to hear theres an easy fixed yes i can get those fixed 200ohm resistors at my local radio shack , will post results here and pics after the v.mod its done and tested.


@ Mayk-Freak , Thanks a lot very kind of you bro , appreciated much. I think i got it fixed. If it does not work maybe i will bother you for one , Thanks a million for you good intentions you are a good man.



Chispy.

If your mod works, can you please put in some photos of the mod, that I can see it better.

[chispy]

Sure bro , im done with the mod , i need someone to guide me to the read out point for the V.Core.

This is my Revision 1.1 eVGA GTX 285 vanilla card with new PCB th same as the 2GB PCB. Can someone help me out finding the read out point for the V.Core GPU Please , thank you. Volt Mod its done but i need the V.core read out point for verification before i test the card.






Front of the card with volt mod done already , ready to test. but i need v.core read point.
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By chispy, shot with FinePix A340 at 2009-07-28

[Mayk-Freak]

perhaps here?

[chispy]

Mayk-Freak i wont be home for a few days , i will test when i get home from taking my son to a boyscout Jamboree


chispy.

[Mayk-Freak]

I´ve done the GPU Volt Mod, results with 1,26 V watercooled.


3DMark 06 MSI 285 GTX 2 GB 781/1751/1320MHz


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