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

[Hondacity]

Very nice.

I am very pleased with my SSC, while the core can only do maybe 755 mhz, the memory can go to 1525mhz!

initially my mems can do higher than 1525, but weeks later, it didn't want oc...

[dreamaxx]

where exactly do you measure the voltage from? and what is a DMM? step by step guide for a noobie please?

[trueg50]

where exactly do you measure the voltage from? and what is a DMM? step by step guide for a noobie please?

DMM: Digital Multi Meter. A device that measures resistances, and voltage of circuits (both AC and DC).



If you want to learn to volt mod, you could try picking up an old 7600GT/8600GT off Ebay, and try volt modding that via one of the guides here, or the guides over on Techpowerup's volt mod section.

Of course, feel free to post some more questions for us.

[dreamaxx]

Ah right. I was wondering how a multi meter actually measures resistance. Does it run a current through it?

[EL RICHARDO]

10K : 2.25-2.29v
4.7K : 2.34-2.37v

Where is the point to solder besides ground? I cannot see well in your explanation. Thanks.

[CryptiK]

initially my mems can do higher than 1525, but weeks later, it didn't want oc...

My mem has clocked as well as it did from day one, maybe something else has changed to affect it.

[NapalmV5]

Where is the point to solder besides ground? I cannot see well in your explanation. Thanks.

hope thats more clear.. its not any of the resistors around..

though the ocp mod offers more mem clocks than the vmem mod

[chispy]

@NapalmV5 and Cryptik , maybe you guys can help me , i killed one of my GTX 285 in the middle of an LN2 session , it was an eVGA vanilla with the bridging mods and 1.26v. I bought another eVGA Vanilla for replacement for my tri-sli runs and to try again go tri-sli under LN2 again BUT the new eVGA GTX 285 i received have a different PCB and i cannot find where they have move the bridges for this quick mod as its totally different PCB as my other 2 cards , anyone have a volt mod for this new PCB of the GTX 285 eVGA brand ? If pictures needed let me know and i will post high resolution pics of this new PCB so we can work something out , it will be greatly appreciated any help on this matter .



Angelo.

[NapalmV5]

evga? 1gb? hmm.. yeh post pics.. is it similar to the 2gb pcb?

[chispy]

eVGA 1GB , i dont have any idea what the 2GB model PCB looks like sorry.
I will post pics asap .
Thanks bro.

[chispy]

Heres Pictures of the back of this new PCB eVGA GTX 285 vanilla -




1- Starting shooting the pcb from the rear to the front



By chispy, shot with FinePix A340 at 2009-06-17


By chispy, shot with FinePix A340 at 2009-06-17


By chispy, shot with FinePix A340 at 2009-06-17


By chispy, shot with FinePix A340 at 2009-06-17




2- The Wole card from the back -






By chispy, shot with FinePix A340 at 2009-06-17

[chispy]

If you need pictures from the inside let me know

[NapalmV5]

yeh its the same as the 2gb

unfortunately its the same wonderful isl6327crz

though a better design/pwm than the first 285 no more squealing

[Sn@ke:~]

Will this mods work for a GTX275?

[chispy]

yeh its the same as the 2gb

unfortunately its the same wonderful isl6327crz

though a better design/pwm than the first 285 no more squealing

Any info on volt mod on this PCB bro ?

[MANIST]

Ive done the bridge mod on two of these, a BFG 285 OC and a XFX 285. The first step I tried to solder just not steady for how small they are, plus nervous having to solder two day old BFG Used defroster repair kit that contains a vile of quick grid and a template out of tape to paint them. Step one I hit 1.26-28 depending on what im running for a load test, these cards out of the box were at 1.20 under load with furmark so they seemed a little higher from the factory. My 3rd 285 is a non reference EVGA 1gig and its only 1.16-18 load on the old fluke dmm. Anyways on my water chiller setup I was able to get my loads at 23-26celcius alowing 775 core and 3000mhz ram speeds. With added voltage my shaders now are able to run at 1650-1700+ instead of vanilla 1571mhz my temps are exactly the same also before volt mods and after.
102,302 on 3dmark03 with upper mods

Step 2 with pencil trick,
I shaded the resister down to 340 ohms on both cards, a mechanical does not work, find an old school pencil 2b. This worked beautiful for voltage at 1.312 on both cards exactly but when I tried to run any heavy overclock I hit OVP. I definitly could see a huge improvment in overclock after shading in though since the cards could run at 800+ but at certain points in 3dmark03 it would kick in OVP. I also tried to run my overclock on them that was 100% stable with only step 1 of the guides at 775core/1500ram and it would OVP on that also. Crotale and Napalm were saying in other voltage mod thread that even stock/water pushed hard will do it cause of unstable current while on the ln2 and dice they are more stable current from being froze. I cleaned off my pencil trace's and retested at step 1 mods 1.26-28 and regained my stability at 775mhz no OVP. When I get bored ill do OVP mod and rest of voltage mods, this along with water chiller and mcw60 blocks have made a awesome gamer/3dmark machine thanks Napalm and crotale!!!!!!!!!!!!

Also chispy
I have that exact card as you and ended up with one of the non reference evga 1gig 285 vanilla. Ive tried looking and comparing circuit layout but its not even the same as my other two. Just wanted you to know my BFG and my XFX vanilla's are old style revision if you want to get a matched set for your two.

[dreamaxx]

So can I just double check... The right way to do this is to use silver conductive pen on 1/2/3/4 11/12 right?

And then 2b pencil on the other little resistor?

I don't wanna do any hard modding... Just the reversible ones for me

How do you measure what voltage you end up with?

[[200]]

Hi,

I am looking at buying a GTX 285 shortly, I noticed that EVGA appear to have updated their cards using a different PCB and memory (.7ns against 08ns IIRC). I have found a couple of different part numbers, would anyone know or can anyone confirm if these cards would be compatible with this modification?

01G-P3-1180-AR - Vanilla
01G-P3-1181-AR - SCC

After looking at the sticker on the back of chispy's card I am lead to believe that these two may not be compatible? I don't know the 'older' model numbers of the cards that have been modded...

Any help would be great - even if its a different brand such as Asus / XFX / BFG

Thanks

[chispy]

Hi,

I am looking at buying a GTX 285 shortly, I noticed that EVGA appear to have updated their cards using a different PCB and memory (.7ns against 08ns IIRC). I have found a couple of different part numbers, would anyone know or can anyone confirm if these cards would be compatible with this modification?

01G-P3-1180-AR - Vanilla
01G-P3-1181-AR - SCC

After looking at the sticker on the back of chispy's card I am lead to believe that these two may not be compatible? I don't know the 'older' model numbers of the cards that have been modded...

Any help would be great - even if its a different brand such as Asus / XFX / BFG

Thanks

Yes they are compatible , i had gone tru many GTX 285 (eVGA vanillas,BFG OC+,XFX XXX and all of them were compatible , even my new different PCB eVGA Vanilla plays well with my older cards , so it will work , no doubt about that. Good Luck.


Chispy.

[chispy]

Any news on the volt mod for this new pcb GTX 285 ? I would appreciate any help or info

[indiecom]

Nice info.....

[Mayk-Freak]

MSI 285GTX OC-SuperPipe 2GB

[nkresho]

Just wanted to say thanks to napalm, and the others who added their input, for the vmod guide. I got my gtx285 up to 775-1700-3000 as compared to a previous 725-1651-2950.

New problem has arisen for me though. I can't get my 3dm06 score to go any higher above the 725-1651-2950 clocks. Score actually drops if I go higher than that. Any iedeas?

it's a vanilla evga card with a koolance fc block on it. q9650 at 4.25 too

[Kain665]

Guys, has anyone found any GTX 275 Pencil/Ink mods? I have my BFG running at 1.18v and it's stuck at 738/1476/1215 - any higher on the core/shaders and it just freezes, temps are good and no artifacts...

[CryptiK]

Just wanted to say thanks to napalm, and the others who added their input, for the vmod guide. I got my gtx285 up to 775-1700-3000 as compared to a previous 725-1651-2950.

New problem has arisen for me though. I can't get my 3dm06 score to go any higher above the 725-1651-2950 clocks. Score actually drops if I go higher than that. Any iedeas?

it's a vanilla evga card with a koolance fc block on it. q9650 at 4.25 too

Its just pushing it too hard for the voltage, frame rates drop giving you a lower score. Give it some more voltage if you want to run it higher.