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post #1301 of 1336

So... the 780Ti DCII mods are foogheyzee my ninja!

 

1. What stock resistance value.. ? There is none.

2. Continuity to ground at mod point... ? Nope.

3. Actual GPUv mod? Nope.. only 3D offset mod.

 

 

**Lets face it - this IC is just a re-branded 'something-or-other'... this whole HotWire crap is a great way to make it hard to mod for experienced people, and a good way to keep circuit information proprietary. Guess its back to penciling resistors and PCB mapping resistances, for me ! There has GOT TO BE A BETTER WAY !!!!


Edited by CL3P20 - 4/16/14 at 10:35pm
post #1302 of 1336
Quote:
Originally Posted by CL3P20 View Post



**Lets face it - this IC is just a re-branded 'something-or-other'... this whole HotWire crap is a great way to make it hard to mod for experienced people, and a good way to keep circuit information proprietary. Guess its back to penciling resistors and PCB mapping resistances, for me ! There has GOT TO BE A BETTER WAY !!!!

http://www.irf.com/product-info/data...pb-chl8318.pdf
http://www.irf.com/product-info/data...pb-asp1212.pdf

I just stick to the guide and it works. I don't understand all this reverse engineering stuff.
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post #1303 of 1336
@ mike - so you have performed :

Remove pgr100
Bridge hotwire pads
Gpuv mod
Remove xr192
Pllv
Memv

...or what combo of the above?

**It's difficult for someone with modding experience to solder and power-up a GPU that has no resistance or continuity at the mod points.... as that generally = lightning bolts from your PCB. I was joking with L0ud, saying I have over-thought this all.. and should just approach the GPU from a noobs prospective..just following the guide blindly. While Im sure things work this way just fine for folks.. im just not OK with soldering up a 600$ PCB when things dont make sense and you have no way of verifying simple things like set resistance.

Folks are sharing what ASUS is letting them.. thats well appreciated. Some of us need a bit more though.
Edited by CL3P20 - 4/16/14 at 10:36pm
post #1304 of 1336
I've done all except removing resistor for memory. Not sure which number it is right now.
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post #1305 of 1336
Quote:
Originally Posted by Mikecdm View Post

I've done all except removing resistor for memory. Not sure which number it is right now.

 

thanks for the reply.

 

I have performed the same on L0uds card with strange results.. all connections verified. Even tried just GPUv.. card will not respond to mods at this time. I need to try replacing the VR.. which I have confirmed works normally once disconnected from the card.....

 

have not had a PCB give me frustration like this in years, and Ive hunted my own mods on many occasions before

 

*@ mike - your links above arent working..? found a copy of the pdf though.. tnx for a shove in the right direction. I will post back with update mods after I poke around some more


Edited by CL3P20 - 4/16/14 at 10:37pm
post #1306 of 1336
They're just data sheets for two controllers. It looks like the one on this card is identical to a chil8318. I connected elmors evc thing to the card too. I actually prefer using the VR. The evc seems to give issues around and above 1.5v and is only good for vgpu on this card. I wish that I could help, but you know more than I do. From what I was told, removing pgr100 and shorting the pads are both required in order for the vmod points to work. I tried to probe them but didn't get anything, just as happened to you. I ended up using a 1k vr for vgpu and it seems to be doing the job fine. I had used a 2k before, but it seems to have ran out of range and vcore would skyrocket and fluctuate a lot.

http://www.irf.com/product-info/datasheets/data/pb-chl8318.pdf
http://www.irf.com/product-info/datasheets/data/pb-asp1212.pdf

Here is a pic of my monstrosity. The vgpu vr is attached to the fan header, that way I can easily remove it and be back to stock. The vmem and don't need much tuning and ln2 voltage is still safe on air. The cables on the bottom are for the evc tool.

wlrPRhs.jpg?2
Edited by Mikecdm - 4/16/14 at 10:54pm
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post #1307 of 1336

Thanks mike.. I will get my hands on it next week and redo all of the connections with new VR's... should 'flush out the demons' :D Today was about other things though... 

 

 

 

R9 290x 

 

Mods performed:

 

GPUv - 100 ohm VR

MEMv - 20k ohm VR

vDDCI - 500 ohm VR

Mem OCP - alternate location with 820 ohm fixed

.9v rail - 50k ohm VR

1.8v rail - 50k ohm VR

vmeasures for all

switches for easy disconnect

and still.... more mods coming..:devil-smi

 

 

 

 

 

Good Modding to you!

post #1308 of 1336
You sir are a modding god biggrin.gif

Can't wait to see your results!
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post #1309 of 1336
More on reference 290X by Shamino

tRBaTlj.jpg



post #1310 of 1336

Nice.. looks like another 2x mods for memory circuit.. probably for fixed voltage. The jumper to the oscillator, I am assuming brings core volts to it.. probably helps for CB, as those crystals freeze and you have bad times..  *Oh and 2nd 6pin brings more current to both mem and core input phases, the way its wired... maybe I'll throw that one on for George too..

 

 I will make sure I measure/tone out those connections and see if I can shed some more info on what they do specifically.

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