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

[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!