vMod-requests and general discussions

[zzolio]

you can't use FB mod chill 8318 use direct feedback

[Masterchief79]

So there's no way to vmod it?

[der8auer]

It works on 780TI classified which uses the chil 8318 aswell

http://kingpincooling.com/forum/showthread.php?t=2459&page=2

So I guess it's possible for this card as well. However I would go for the eVc. Just send a PM to elmor and ask him

[Masterchief79]

I Sent him a PN. Anyway, at least wanna try an FB Mod, so Pin 4 is the right one?

Any other things I have to consider, like this?

Nearest 0402 resistor on NVVDD testpoint need to be replaced from 0 ohm to 50ohm on non-KP cards to enable adjustments.

[Masterchief79]

So I found a similar thread for a GTX780Ti DC2 (will search link if someones interested), where an ASP1212 was modded.

I compared the datasheets and those 2 controllers (CHL8318 and ASP1212) are absolutely identical. I mean, they even just copy-pasted the text in the datasheet.

In that thread, K404 just soldered to pin 4 (VCPU) and it worked, so I did the same, and it worked, too

 

Just running 1,28V without further adjustments (used 50 Ohm potentiometer for vGPU), resistance went down from 8,7 Ohm to 7,5 Ohm. GPU Temperature 53°C @ air, VRM 45°C @ air.

Would take photos but have no cam here.

[zzolio]

It works on 780TI classified which uses the chil 8318 aswell

http://kingpincooling.com/forum/showthread.php?t=2459&page=2

So I guess it's possible for this card as well. However I would go for the eVc. Just send a PM to elmor and ask him

 

then EVGA use a resistor in the feedback line

[K404]

I've been over most "sensible-looking" points to find a mod, but i'm not getting anything

 

Does anyone have info on this controller?

 

Thanks!

 

[poparamiro]

Probably uP controler, find pins with resistive divisor (to gnd and v out) with values from 500 ohm to 2-3k, most likely ~ 1k and mod the pins to 20x to gnd.

 

What card is that?

[K404]

Kepler OEM. It's not like me to struggle so long with finding a vmod point There are a few pins with tiny resistance, which i've found on some other Kepler cards (example.... some Asus PCBs need 3.5 ohm (NOT Kilo-ohm) soldered to GND for vCore....) also a few pins around 1K and a few around 20K. You think I should focus on the pins/points around 1K?

[zeropluszero]

Hey guys, have here two cards I'd like to mod, after some assistance with them, I've never done the checking of a card for resistance and that, and my electrical knowledge is nearly none.

 

first card, a Gigabyte GT610 card GV-N610SL-1GI

https://imgur.com/a/ux1Fv

it has two IC's, one on the front with 8 pins is labelled uP1504T PGP38K

and on the back with the green dot is labelled 25Q10T CDC502 CH1314

 

second card, an Asus GT520 (same core as GT610) card ENGT520_SILENTDI1GD3LP

has two APW7165A VN18G ics at the IO end of card and above the core MX 25LS12 (something here ending in 12G that i cannot read)

back side has an IC labelled RT9018B 18PSPDA40X

 

if anyone could offer any assistance or even guide me on how to find out for myself, that'd be awesome.

[rsnubje]

Hey zero,

 

You're still going to need to do some measuring to be able to successfully mod these cards. I added some pics with the prospected pins of the core voltage controllers. I'm not 100% sure I got the right Ic on the GT 520, but it seems the most logical one. All you need to do is measure the highlighted pins. These are just for the core voltage. Let us know when you have the values.

 

[poparamiro]

Kepler OEM. It's not like me to struggle so long with finding a vmod point There are a few pins with tiny resistance, which i've found on some other Kepler cards (example.... some Asus PCBs need 3.5 ohm (NOT Kilo-ohm) soldered to GND for vCore....) also a few pins around 1K and a few around 20K. You think I should focus on the pins/points around 1K?

 

Yes, but not sure 100% is uP.

[CL3P20]

I've been over most "sensible-looking" points to find a mod, but i'm not getting anything

 

Does anyone have info on this controller?

 

Thanks!

 

 

Looks similiar to some of the rebranded IC that XFX was using on their GPU for a while.. resistance for mod points on those was typically near 1k, requiring 20k for mod.

 

pic for reference - http://homepage.ntlworld.com/peter.jones107/8800gs-01.JPG

[K404]

Thanks for the input guys! Will see if I can find the concentration to have a shot this evening

[zeropluszero]

Hey zero,

 

You're still going to need to do some measuring to be able to successfully mod these cards. I added some pics with the prospected pins of the core voltage controllers. I'm not 100% sure I got the right Ic on the GT 520, but it seems the most logical one. All you need to do is measure the highlighted pins. These are just for the core voltage. Let us know when you have the values.

 

http://i.imgur.com/oaQeLERl.jpg

http://i.imgur.com/saKjZfAl.jpg

upper photo (gigabyte card) 0.755k ohm

lower photo (asus card) 13.44k ohm

[rsnubje]

If the pins were the correct ones(I would ask for a second opinion as there was no datasheet on the uP1504T), all you need to do now is take a variable resistor of 20x those values, so 20k pot for gigabyte card (there is nothing in between 10k and 20k) and 250k for the asus card. Depending on which pots you use, if it's a long one like one from helitrim, be sure to bent one pin that you are not going to use and make sure that you have max resistance over the other 2 pins before you solder it onto the card.

 

For example, one like this:

Edited April 4, 2014 by rsnubje

[zeropluszero]

Yeh, pots like that are the ones at my local store. Thanks heaps

[Guest cowgut]

well then I will add any info or ask for some help in a day or two

 

Thanks

Well hard modding is not needded yet so far for me just a bios flash with gain +50 or more on clocks.

Remember no software volt adding and read voltage with dmm no trust software

Evga 750 ti bios good for 1.21v clocks modded to go around any +135 limits in certain drivers.

good for 1490+ on air with this card

http://www38.zippyshare.com/v/50137316/file.html

there is more in the bios if you want to mod it more up to 1.265v+ i have found to be ok

 

the lateset card i got sucked out of the box stock 1.25v!!!!! and trottle was very bad but is great on dice after bios mod....sucky on air or water thuo only 1468

asus model with 6 pin

 

asus cards bios has all power states 2d .97v 3d 1.28v max,the +135 limit in driver is no problem for air with that its the cards dice limit 1546 not bad for just bios and dice

http://speedy.sh/wNgCm/750a.rom

 

result

http://hwbot.org/submission/2530203_cowgut_3dmark___fire_strike_extreme_geforce_gtx_750_ti_2537_marks

Edited April 14, 2014 by cowgut

[zeropluszero]

another GT610 card

Palit card

Elixir ram, has a bunch of IC's

1- Winbond 25X20CLNIG - presume bios chip

2- RT8120F GSPFK80A

3- 4802 RP80B

4- RT8120F GSPFK80A

5- RT9059 GSPFJ50P

 

pics

Edited April 18, 2014 by zeropluszero

[der8auer]

The two RT8120F should be for memory and GPU

 

Measure resistance from pin 6 to GND

 

http://www.datasheetarchive.com/dl/Datasheets-CRAI/DSACRA000018042.pdf

[zeropluszero]

any idea how i could find which is which before soldering?

[d0minat0r]

please help me to disable OCP on ASUS non reference 8800GT

i find this picture on Russian forum

I think i need to raise resistance on yellow dot pin #35

Edited June 6, 2014 by d0minat0r

[nachtfalke]

the really problem on L6713A pwm is the OVP:)

 

 

first configure the FB mod and see were is the ocp trigger value , then configure the ocp from my pic ( you can tryed from 5k to 3,5k , for me 4k offer 1.5 - 1,55v enought i think).

 

ocp mod offer you 20-30mv before ovp shut down the card ,and then need ovp mod .

the best way is vid mod , but i don´t have time now to configure vid mod, please try in this way and post here.

 

Edited June 9, 2014 by nachtfalke

[Gunslinger]

Looking for MSI R9 290X Lightning 0.95V mod.

[dhenzjhen]

Looking for MSI R9 290X Lightning 0.95V mod.

 

THIS ^^