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GIGABYTE Radeon HD 7870 Windforce3 Voltage Mod?
- Thread starter N0ble
- Start date
- Thread Starter
- #63
Managed to pick up some 60/40 solder today 
Still waiting on my 50 Ohm trimpots.
I have bought these 50k trimpots from Maplins for the memory.
I hope these are correct?
http://www.maplin.co.uk/square-22-turn-cermet-preset-potentiometers-2202
Still waiting on my 50 Ohm trimpots.
I have bought these 50k trimpots from Maplins for the memory.
I hope these are correct?
http://www.maplin.co.uk/square-22-turn-cermet-preset-potentiometers-2202
- Joined
- Mar 27, 2011
- Location
- Soviet Mexico
just check your resistances before you do it and after to make sure you don't have any shorts and you should be pretty safe.
- Thread Starter
- #67
hmm it does not seem to work. Before i started to turn the resistance down it worked fine.
But when turning the resistance down and run a bench, i get pixelation and then locks up.
From my multimeter i see no more than 1.2V.
I soldered to the top of the cap like this.
But when turning the resistance down and run a bench, i get pixelation and then locks up.
From my multimeter i see no more than 1.2V.
I soldered to the top of the cap like this.
- Joined
- Mar 27, 2011
- Location
- Soviet Mexico
you wanna post of pictures of the actual location your going to for the trimmer. dont really need a picture of the trimmer just the end point for where the wires are going.
- Joined
- Mar 27, 2011
- Location
- Soviet Mexico
Yeah your not actually modding the card with that your just increasing the voltage to the monitor point which is counter productive and not really doing anything. You need to Look up the 7970 Mod guide i believe and find the solder location for the trimmer, which should be off one of the Phase controllers.
this way when you change the voltage on the line associated with the trimmer you will actually be telling the Phase controller to put out more voltage.
this way when you change the voltage on the line associated with the trimmer you will actually be telling the Phase controller to put out more voltage.
- Thread Starter
- #71
- Joined
- Mar 27, 2011
- Location
- Soviet Mexico
i am not sure if their resistor numbering is the same since the layout of the two cards are slightly different from each other. But I looks like hes connected of R681 and you have yours off of R684. I am guessing since i dont have the card in hand, that the other side of that location goes to the FB pin of the Phase controller, But its hard for me to say without actually having the card in hand.
Edit - change the target Resistor number from the romanian picture, it was 681 not 682
Edit - change the target Resistor number from the romanian picture, it was 681 not 682
- Thread Starter
- #74
Bobnova advised me to solder to the Cap as it follows to the 681 resistor. I can confirm that when taking voltage reading from all those resistors before the mod, the only resistor that matched the voltage of the actual core was 681, and when measuring the cap it also gave the correct voltage for the core.
Now the odd thing.... i was never able to bench my card on a clock speed above 1260 core.... i have just done a 3DMarks11 at 1333 core and 1321 memory. Got a score of 7867... yet when reading the voltage on the multimeter its not going above 1.17v??
http://www.3dmark.com/3dm11/4129685
Something is a little odd here....
Now the odd thing.... i was never able to bench my card on a clock speed above 1260 core.... i have just done a 3DMarks11 at 1333 core and 1321 memory. Got a score of 7867... yet when reading the voltage on the multimeter its not going above 1.17v??
http://www.3dmark.com/3dm11/4129685
Something is a little odd here....
- Joined
- Mar 27, 2011
- Location
- Soviet Mexico
1.17v during loading?
- Thread Starter
- #76
Yep, actaully just double checked and 1.16 under full load.
This is really odd as the stock card reads 1.19 under full load......
Am i reading voltage from the wrong point??
- Joined
- Mar 27, 2011
- Location
- Soviet Mexico
What did your current read point read before the mod?
- Thread Starter
- #78
it was reading the correct voltage before.....
