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Modlog: GTX 280

post #1 of 22
Thread Starter 
Mikecdm has sent me his GTX 280 for modding. This is the first Volterra controlled GPU I've had at my desk, so I'm doing some studying with the card and reading up on the datasheet.

The card
100_2274.jpg
100_2275.jpg

Removing this backplate so I can do some live probing with it.
100_2276.jpg

First off I wanted to make sure I could get the voltage slider unlocked in MSI's Afterburner. Worked like charm. No, I didn't actually hit apply with 1.7v.
unlocked.jpg

Measure points added for GPU, VDD, and VDDQ
100_2285.jpg

Mods planned:
vGPU (Doing this for him even though software voltage should be enough)
OCP mod
Capping.

Would like to figure out the memory mod, but looks like it's controlled by the same Volterra IC as the GPU and the datasheet is very different from other VRM controllers. It's a little confusing from what I'm use to. Just a part of continuing education. biggrin.gif
    
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post #2 of 22
subing in smile.gif nice card
    
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post #3 of 22
pizza I posted some mods on the essintials thread I could not get to work. I got funny pink screen at anything after 1.4 volts changed in bios so I tried feedback mod and ocp but had wierd results have not had time to go back to it yet. But if you come across the mod from xtremesystems I would put feedback mod on a switch same with ocp at least for testing purposes.....that being said your much better with the iron than me. Good luck. Oh yea mine also coldbugged at -45 or -50 dont really remember.

just saw you are working the same mods and they seem to be from shamino so I prolly screwed something up. cant wait for your results.
Edited by reggiesanchez - 6/4/11 at 2:17pm
    
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post #4 of 22
Thread Starter 
Whether or not it continues to scale above 1.35v will vary.

Studying up on the IC before I complete the mods. I might put some switches on them as well.

I'm not going to test it cold. Will let Mikecdm do that.
    
CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
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Seagate 250GB + 80GB WD for benching TT 875w, Corsair 650TX Custom bench station 
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CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
Hard DrivePowerCase
Seagate 250GB + 80GB WD for benching TT 875w, Corsair 650TX Custom bench station 
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post #5 of 22
here..

vt1165mf.jpg

reference your MSI 5870 Lightning mods wink.gif * let me know if you need them..pretty sure you have the pdf though
post #6 of 22
that looks like fun to solder.. nice n close tongue.gif
    
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post #7 of 22
Quote:
Originally Posted by Liighthead;13755554 
that looks like fun to solder.. nice n close tongue.gif

*notice the FB is connected to a point on the backside of the PCB.. same as Pizza's pic in the vmod section..just the other point of view. It has some other traces marked as well.

This IC is on lots of GPU's though..I dont want to spam Pizza's log anymore. I think he has what he needs.
post #8 of 22
Thread Starter 
Just no memory mod.
    
CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
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Seagate 250GB + 80GB WD for benching TT 875w, Corsair 650TX Custom bench station 
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CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
Hard DrivePowerCase
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post #9 of 22
My System
(13 items)
 
  
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600K Gigabyte P67A-UD4 HD5850 Xtreme 4x4GB Exeleram Black&White DDR3-1600 @ 1.31V 
OSMonitorKeyboardPower
Win 7 / WinSer08 Acer V243H MS Office Edition Rasurbo 650W 
CaseMouseMouse Pad
Antec Ninehundred Razer DeathAdder Black Edition Razer Goliathus Speed (mid-sized) 
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post #10 of 22
Thread Starter 
th_BowingSmiley.gif

Wasn't having any luck figuring out the slaves. You are the man!!!
    
CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
Hard DrivePowerCase
Seagate 250GB + 80GB WD for benching TT 875w, Corsair 650TX Custom bench station 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
Hard DrivePowerCase
Seagate 250GB + 80GB WD for benching TT 875w, Corsair 650TX Custom bench station 
  hide details  
Reply
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