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

[10acjed]

change has definitely occurred.. vdiff resistor back @ 770ohm

and im getting 1.30vcore @ load just by the bridges alone

still trying to figure out where how why im getting .04v higher

btw this is on the ssc 285

same here, it changes once I did the pencil mod, and even tho i erased it it continued to add .02 - .04 to my voltage...

I was at 1.18 load when i started before any modding, now i am at 1.20 load...

All other ink mods were completely removed, so just by shading the resistor you will see an increase in vGpu.

Too bad I cant get any OC gains tho...

[NapalmV5]

@ 10acjed

you gotta keep 1/2/3/4/11/12 bridged

i want to make it as clear as i can to everyone about vcore increase on the 285

step #1 vid bridge/s
step #2 lower vdiff resistance
step #3 lower resistance @ the point on the back of the card where ive indicated @ guide

step #3 could be avoided if enough low resistance @ vdiff resistor but thats a maybe and how high the vcore you want to go

theres no one bullet kills all on the 285 not yet anyways

maybe the experts/professionals will bring that

[CryptiK]

change has definitely occurred.. vdiff resistor back @ 770ohm

and im getting 1.30vcore @ load just by the bridges alone

still trying to figure out where how why im getting .04v higher

btw this is on the ssc 285

That's strange, if its all back to stock (except caps) it should be back to the old voltages. Are your DMM batteries ok?

EDIT just saw 10acjed's post - sure all the pencil residue is gone? Did you clean resistor with acetone or isopropyl?

One more update:

Since changing my fan speed manually to 100%, my vanilla eVGA 285 reached new stable clock speeds.

Best clock speeds with fan set to auto is 729c/1620s/1458m.

Best clock speeds with fan set to 100% is 756c/1656s/1512m.


My silver conductive pen should be here Tuesday and I think I might go ahead and order a FC block today seeing that reduced temps seem to have more affect than I would have thought on my clock speeds. I certainly can't live with the stock fan set to anything above 65% for everyday use.

When left on auto, my fan never goes over 72% to keep the gpu at ~85*C, at 1.24 vgpu.

The fans do get pretty loud thats why I leave mine on auto. Water should allow it to clock higher, the GT2XX series is very responsive to temperature.

[Blkout]

That's strange, if its all back to stock (except caps) it should be back to the old voltages. Are your DMM batteries ok?

EDIT just saw 10acjed's post - sure all the pencil residue is gone? Did you clean resistor with acetone or isopropyl?



When left on auto, my fan never goes over 72% to keep the gpu at ~85*C, at 1.24 vgpu.

The fans do get pretty loud thats why I leave mine on auto. Water should allow it to clock higher, the GT2XX series is very responsive to temperature.

Yea, I'm fine with my vanilla 285, it runs faster than a stock FTW edition with no mods at all. With water and some minor volt mods it should run even better. It was worth saving the $40-50 over the top of the line overclocked parts to get the same or better results and now that money saved can be applied to a GPU waterblock.

[NapalmV5]

That's strange, if its all back to stock (except caps) it should be back to the old voltages. Are your DMM batteries ok?

EDIT just saw 10acjed's post - sure all the pencil residue is gone? Did you clean resistor with acetone or isopropyl?

thats what i used no residue left.. i removed the mod so i can tell what diff the kemet 680uf makes on the ssc and so far performance is looking good

dmm battery still good but im gonna change it just to make sure

[bito]

FYI Guys...the GTX 285 FTW bios is available now over at mvktech

[MisterMagoo]

Sweet I will probably flash mine. FTW for $330

[NapalmV5]

thanks ^ bito

i flashed my ssc to ftw and lost ~18 fps @ 181.20

might be diff story @ 181.22/182.05

[MisterMagoo]

Ill let you know how it goes, I flashed both mine just reinstalling drivers now.

[Blkout]

thanks ^ bito

i flashed my ssc to ftw and lost ~18 fps @ 181.20

might be diff story @ 181.22/182.05

That doesn't make sense if it's just a clock speed change. Certainly they didn't change anything else in the BIOS, or did they?

[MisterMagoo]

FTW is a much better bios for me. My second 285 would barely overclock compared to the first. Now they are both running 760/1700/1490. I am sure my first which is an amazing card would run 800's on the core with the volt mod and the FTW bios.

[Orangeblast]

That doesn't make sense if it's just a clock speed change. Certainly they didn't change anything else in the BIOS, or did they?

Nope. Nothing changed in the BIOS just better binning.

Only thing different with the FTW is better binning....same factory volt mod...and the BIOS probably just reflects better "stock" clocks.

Most of us in this thread could probably flash to the FTW BIOS with no issues (like BSOD or artifacting) We all seem to have some pretty solid SSC cards.

[Blkout]

Nope. Nothing changed in the BIOS just better binning.

Only thing different with the FTW is better binning....same factory volt mod...and the BIOS probably just reflects better "stock" clocks.

Most of us in this thread could probably flash to the FTW BIOS with no issues (like BSOD or artifacting) We all seem to have some pretty solid SSC cards.

Well, I figured as much, but his results didn't reflect that.

[Orangeblast]

Yea...they were a bit strange...



On a side note. Do you think we can get a summary of this thread?

it would be cool to say a 1 - XX step guide on how to fully mod the 285s...

also, noobish question here, when doing the volt mods and bridging those pin outs...do you need to do the CAP mods too? or are they completely independent of eachother?


Is water needed for the volt mods or can we just use the stock cooling?

[10acjed]

Yea...they were a bit strange...



On a side note. Do you think we can get a summary of this thread?

it would be cool to say a 1 - XX step guide on how to fully mod the 285s...

also, noobish question here, when doing the volt mods and bridging those pin outs...do you need to do the CAP mods too? or are they completely independent of eachother?


Is water needed for the volt mods or can we just use the stock cooling?

post #144 is more or less step by step to get to 1.36 vGpu - 2.20 vMem

[CryptiK]

thanks ^ bito

i flashed my ssc to ftw and lost ~18 fps @ 181.20

might be diff story @ 181.22/182.05

Did you compare the memory timing table between the two BIOSes? They may have loosened the timings to allow a better memory overclock in the FTW BIOS and as result running the same memory speed as original BIOS you may have lower bandwidth/higher latency.

[10acjed]

@ 10acjed

you gotta keep 1/2/3/4/11/12 bridged

i want to make it as clear as i can to everyone about vcore increase on the 285

step #1 vid bridge/s
step #2 lower vdiff resistance
step #3 lower resistance @ the point on the back of the card where ive indicated @ guide

step #3 could be avoided if enough low resistance @ vdiff resistor but thats a maybe and how high the vcore you want to go

theres no one bullet kills all on the 285 not yet anyways

maybe the experts/professionals will bring that

I had taken them all off because I had no clock gains so I am holding off til I get better cooling. I saw no need in putting extra voltage to it if its running fine now.

I probably did not clean the resistor enough because even with everything removed I am getting a reading that is .02 higher than when I started.

[nickless]

yeh dont use #2 HB for ex. no good

i used just a #2 and went over the resistor good.. no mercy

i got it as low as 320ohm

400-500ohm noticeable vcore increase...

Ok, I've found 6B pencil, also 21/2=HB. I'll try both of them, I hope one of these pencils will help this time.

EDIT: Between I've flashed my card with FTW BIOS, but nothing changed with FW 182.05.

EDIT2: I've managed to reduce the resistance with 21/2=HB pencil to 330ohm, but it gives me only 1.24v (before only with 1/2/3/4/11/12 it was 1.21v). I'll clear everything and make the hall mod again, maybe some bridges are not connected very well

[SAE]

6B should work very well. It contains a good amount of graphite.

[NapalmV5]

i finally found the identity of the 330uf caps on the 285

they aint no tantalum but panasonic ecg sp-cap/polymer aluminum 2.5v caps.. duh!

6-9mohm esr/but also low 3-3.5arms ripple current

im gonna recap the 6mohm esr 470uf 6.3v kemet tantalum (C84-7) to:

kemet 680uf 4v 4mohm esr/high 8.2arms ripple current

i wish i could find the 1000uf 2.5v 4mohm esr kemet.. before i order the 680uf ill hunt these down

this is gonna surpass stock performance and bring extra mhz

[SAE]

We want to see photos for sure!

[NapalmV5]

^ alright

heres a pic of what i mean by performance.. cinebench opengl bench is very sensitive to this

285 amp @ 4 x 680uf kemet @ C561-4.. normally @ 8xxx score


285 ssc currently @ 112xx score with the 680uf kemet @ C561-4
normally 8xxx score

[ChinStrap]

i finally found the identity of the 330uf caps on the 285

they aint no tantalum but panasonic ecg sp-cap/polymer aluminum 2.5v caps.. duh!

6-9mohm esr/but also low 3-3.5arms ripple current

im gonna recap the 6mohm esr 470uf 6.3v kemet tantalum (C84-7) to:

kemet 680uf 4v 4mohm esr/high 8.2arms ripple current

i wish i could find the 1000uf 2.5v 4mohm esr kemet.. before i order the 680uf ill hunt these down

this is gonna surpass stock performance and bring extra mhz

man, i give you credit for being able to do this. i wish i could recap a GPU - my hands shake tooo much and my eye sight is VERY bad.

Please link caps you used and *begs like child* please post pics of what you re-capped.

i have a trusted person in mind for re-capping.

[Orangeblast]

What kind of temperatures are you seeing with the voltage mods?

[MisterMagoo]

I am at about 70C in warhead a couple hours.