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

[andressergio]

Back again

Tested new beta 195.39 and no issues at install but high OC leads to crash always, made me tough it was my VGA so i revised the vids mod and took the oportunity to bridge vid 12, the re installed 190.62 best drivers inmo

now i got as you napalm 1/2/3/4/11/12 reading 1,25+ if touching the middle pin of the ground of the PCIE connectors, reads different on the others

re tested and got this on

Q9650@ 4500
W7x64 GTX285 @ 800/1872/3024



Cheers
Sergio

[NapalmV5]

thanks yeh its been modded over several times

alright! now you got step1 going all the way.. step2 is more picky than the bridging of step1.. pencil is not gonna work that well.. may work for a few minutes/hours/days and then the card wont boot or if it boots it wont run 3d etc.. step2 is best replaced and youll get a big boost from this mod

if you dont do step2 at least do step3 (close to ~1.30v) and do the ocp mod.. big boost

cmon sergio get more juice going thru

good luck!

[andressergio]

thanks yeh its been modded over several times

alright! now you got step1 going all the way.. step2 is more picky than the bridging of step1.. pencil is not gonna work that well.. may work for a few minutes/hours/days and then the card wont boot or if it boots it wont run 3d etc.. step2 is best replaced and youll get a big boost from this mod

if you dont do step2 at least do step3 (close to ~1.30v) and do the ocp mod.. big boost

cmon sergio get more juice going thru

good luck!

Thank you mate of course i will do it bad part is that i have to take out the water and tubes hella work...waiting the day to do it...as i have a baby on its way Valentino the youngest XS member 5 month inside mom now

i have a question mate

when measuring GPU volts touching different grounds on the PCIE connector give me 2 different volts, this happened on my 8800GTX /ultra and now on GTX285 with diff PSU...

this is what i get today @ LOAD (values a rounded) vid 1/2/3/4/11/12 bridged wich one to use as ground reference ?



Cheers and thanks for your whishes
Sergio

[NapalmV5]

boy on the way?? whoa! nice congratz!! to you both

boy is valentino gonna oc you guys

@ pcie im measuring ~+12,60v thats the v12 rail



measure vgpu/vmem at these points: http://www.xtremesystems.org/forums/...&postcount=237

[andressergio]

boy on the way?? whoa! nice congratz!! to you both

boy is valentino gonna oc you guys

@ pcie im measuring ~+12,60v thats the v12 rail



measure vgpu/vmem at these points: http://www.xtremesystems.org/forums/...&postcount=237

lol thanks napalam

i was referring wich ground to use ? as on the grounds i posted reads different vgpu volts...

Cheers
Sergio

[NapalmV5]

for measuring use ground from molex or other grounds for better reads

[andressergio]

for measuring use ground from molex or other grounds for better reads

yeah on chassis reads me 1,22+ so not any benefits for the vid 12 bridged...i will do it the hard way

Cheers napalm and thanks
Regards Sergio

[NapalmV5]

cmon sergio ive reached 1.67vgpu @ load

looks like 1.7vgpu possible

[andressergio]

cmon sergio ive reached 1.67vgpu @ load

looks like 1.7vgpu possible

i know i will mate be sure of that

damn i cant find 470uf 2V SMD caps here...either way will do the rest of the mod when i have time to take my card out

Cheers mate
Sergio

[CryptiK]

I'm using 4 x 220uf 10v Tantalum caps on mine. The case size of the caps I used is 6mm in length.

You don't have to use 470uf - what can you get there?

[andressergio]

I'm using 4 x 220uf 10v Tantalum caps on mine. The case size of the caps I used is 6mm in length.

You don't have to use 470uf - what can you get there?

Hey Cryptik---

100uf 6V only chance, but is it a must vor the vgpu /ocp/ovp mod ? or it just helps...

Cheers
Sergio

[CryptiK]

The cap mod essentially has nothing to do with the OCP/vGPU mods. It's not required, just an extra something you can do that's all.

[NapalmV5]

sergio if thats the case yeh dont worry about the caps.. see how far you can go on the vgpu/ocp mods

[Boulard83]

OK !! I just read EVERYTHING on this post ... ( damn its a long one ).

1 : STOCK V can be raised to 1.26 without mod ?

2 : I flashed my card with 1.25v 725/1550/1400 and its working fine ( also fine tuned the FAN slope ).
Temps reach 71c with fan in the low 60 on AUTO while gaming or 3dmark06. Idling in the low 40 with fans 40%.
How far you think i can go with 1.25 ( or 1.26v ) ?

[NapalmV5]

sorry boulard you had to go thru it.. ive revised first post


yes step1 (mod involved) ~1.26v - though not all 285s are exactly the same voltage.. you may get only 1.23v.. if properly done step1 should at least get any 285 close to 1.26v.. my evga ftw 1gb ~1.3v from 1/2/3/4/11/12 bridged


100% fan (sorry i can only go by 100% fan) and 1.26vgpu should do ~756/1656/1458 even @ heavy loads

[andressergio]

sergio if thats the case yeh dont worry about the caps.. see how far you can go on the vgpu/ocp mods

thanks napalm will proceed with the rest

cheers
Sergio

[andressergio]

sorry boulard you had to go thru it.. ive revised first post


yes step1 (mod involved) ~1.26v - though not all 285s are exactly the same voltage.. you may get only 1.23v.. if properly done step1 should at least get any 285 close to 1.26v.. my evga ftw 1gb ~1.3v from 1/2/3/4/11/12 bridged


100% fan (sorry i can only go by 100% fan) and 1.26vgpu should do ~756/1656/1458 even @ heavy loads

yes thats my case on the BFG GTX285 SSC H20...bridged 1/2/3/4/11/12 and get just 1,23

Cheers
Sergio

[NapalmV5]

no problem sergio leave all 6 bridged.. you can try again @ ~1.26 after you remove the 285 for vmodding

if you still get 1.23 still leave all 6 bridged and go forth with the other vmods

good luck!

post #1 revised

*** please mod at your own risk ***

voltages/vmods/cap mods @ evga ssc 285





10v 1500uf rubycon blackgate nx cap @ vacant C561-4

dont mind the bottom cap


guide to 1.39375vgpu max (reference voltage) past this voltage further vmods are needed.. crotale vgpu/ocp mods: http://www.xtremesystems.org/forums/...d.php?t=220607

these steps + crotales vgpu/ocp mods: 1.67vgpu @ load reached on the ssc 285

before attempting any vmod please measure your current voltage/s

measure points
- red:vgpu/green:vmem
- courtesy:CryptiK


note: voltages/vmods @ evga ssc 285

step #1
- for better understanding please check dengyongs post #80 cryptiks post #112 and #118
- simple way to increase vgpu from 1.15v reference
- 1.26vgpu @ load (1.3vgpu on the evga ftw 285)


step #2
- vdiff mod
- increases efficiency
- the lower the resistance at this resistor the higher the vgpu allowed
- best if resistor replaced with a 300-400ohm resistor
- or try a 700ohm resistor in serial to the 700ohm resistor onboard
- or pencil the resistor to bring resistance down to around 350ohm
- 1.29-1.33vgpu @ load (1.36vgpu on the evga ftw 285)


step #3
- one more vgpu mod
- increases voltage according to the resistance @ vdiff
- solder a 150ohm resistor to ground from this red point
- 1.36vgpu @ load (1.39vgpu on the evga ftw 285)


^ 2.20vmem @ load

these steps + crotales vgpu/ocp mods: 1.67vgpu @ load reached on the ssc 285


thanks goes to
- Cryptik for all the help/confirmations
- crotale for his vgpu/ocp mods
- dengyong, andressergio and everyone else contributing @ thread

good luck to all!

[andressergio]

no problem sergio leave all 6 bridged.. you can try again @ ~1.26 after you remove the 285 for vmodding

if you still get 1.23 still leave all 6 bridged and go forth with the other vmods

good luck!

post #1 revised

good luck to all!

Thanks napalm for re posting all the info needed i think my BFG will go up a lot on this volt mod just have to find the time to drain the system and replace tubes etc as it will be requiered after the mod, i also have only one chance to work so i have to do it very carefully...any mistake and will have to take all again out

thanks for all the help, to you napalm, cryptik, crotale and so others

[Boulard83]

THX for answering napalm !

[andressergio]

Well guys i finally do the mod...i want to thanks ma mate Cryptik for being there when i need on msn...and so to napalm for the help always

much thanks guys

started to test and its working as a charm only thing i need to figure out is that if i pump shaders over 1836 with 810 core and mems on 3096 i get solid colours, i have tuned the OCP vr on 10k now and still vgpu didnt pass 1,35 load, just started to test so i dont want to give a lot of volts at first, temps on the VGA are awesome tested to 1,38Vgpu and does not go over 51C at full LOAD

here's the mod



played cryis warhead on this settings for more than an hour W7x64




and some 3DM06 test
Q9650@ 4608 GTX285@ 810/1836/3024
vgpu load 1,35 idle 1,15
W7x64



Cheers guys will keep testing and will try to find some tantalum caps to solder as only here are 100uf/10V what do you think of those ?

Sergio

[Leeghoofd]

Nice work Sergio (makes my GTX 285 more than blush), but do you sense any difference between let's say what it did with the first mod and what you are trying to achieve now ? I would agree for benching to push as hard as possible but for daily use it seems to get a bit out of hand... but that's for you to decide ofcourse... I just want to avoid you wasting a brilliant card...

[andressergio]

Nice work Sergio (makes my GTX 285 more than blush), but do you sense any difference between let's say what it did with the first mod and what you are trying to achieve now ? I would agree for benching to push as hard as possible but for daily use it seems to get a bit out of hand... but that's for you to decide ofcourse... I just want to avoid you wasting a brilliant card...

Thanks mate

I was able to bench on that clocks before now i can play Crysis at those, wich makes a real difference, what is amazing are temps, for now i will leave it on that vgpu and keep testing. Also for daily use remember the card goes to stupid clocks at 1,14~ idle wich seats at 36C to 38C i don't think this could damage it. But agree that i wont leave it at hard vgpu for 24/7.

Also i made a mistake on my first mod i was reading bad getting 1,22+ and i did what Crytpik and napalm told me and use molex ground and with all bridged i was getting 1,25vgpu, so thats why basically going for 1,35 makes my bench clocks play on crysis wich i consider the most demading games...on others i can play even at 1872 shader now.

Cheers leeg
Sergio

[NapalmV5]

i see youve done crotales vgpu/ocp mods only.. no faith whatsoever in napalm huh sergio? lol thats ok no problem

solid colors: bring resistance down to 10ohm @ ocp (dont worry it wont waste your 285) so its not in the way anylonger.. increase vgpu to ~1.4 @ 810/1872.. if still solid colors then try 810/1872/2970-3024

last resort.. take it above 1.4vgpu

[andressergio]

i see youve done crotales vgpu/ocp mods only.. no faith whatsoever in napalm huh sergio? lol thats ok no problem

solid colors: bring resistance down to 10ohm @ ocp (dont worry it wont waste your 285) so its not in the way anylonger.. increase vgpu to ~1.4 @ 810/1872.. if still solid colors then try 810/1872/2970-3024

last resort.. take it above 1.4vgpu

no mate its not that remember i have the hughe Danger Den block covering ALL the other part, i did this mod as it was only on the upper part, i suppossed it would be the same dont take personal plz

Cheers
Sergio