thanks a lot for pictures t024484 ;)
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thanks a lot for pictures t024484 ;)
You are THE ONE t024484 :D
thanks again for everything
mod done (1.4v), with NV silencer 5 rev2 42°C idle 60°C load
2D : 450/1320 1.2v
3D : 615/1680 1.4v :D :D :D
Congratulations, I am glad you got it working.Quote:
Originally Posted by bouc
for info, I did modify my bios using nibitor to create second vid, but rivatuner said 2D vid 0, 3D vid 2, then did download an evga SS bios and rivatuner said 2D vid 0 and 3D vid 1.
++
Did you tell Nibitor that you wanted to use VID1 but Rivatuner reported that it was VID2 ?Quote:
Originally Posted by bouc
This is quite strange.
nice guide
yep, that's that, do you want the bios image? maybe a step to more than 2 vid on 7900GT :DQuote:
Originally Posted by t024484
Yes, I would like to receive it. Just for the reason that we can inform Nibitor that there is a bug in their program.Quote:
Originally Posted by bouc
here it is
http://boucz.free.fr/bios/mod.rom
t024484,
Awsome work, Ill do this once my 7900GT is returned from RMA.:toast:
Is it me, or are the mod pictures not visible? I'm highly interested in this mod...
It is still there.Quote:
Originally Posted by Orion24
I replublished in posting 24
OK thanks :) . Just noticed. Now I wonder where do I get to find these staff in my country... :confused: . Anyway, if I get to do this, I'll go for more than 1.55V 3D. The same 2D/3D voltage was keeping me from doing the mod for more volts.Quote:
Originally Posted by t024484
I'll disagree. Most people with the problems never overvolted their cards and were at 1.2V all the time. I think EVGA did that to rule out the possibility of of 1.2V beeing insufficient for the overclocked 7900GT cards to run stable.Quote:
Originally Posted by t024484
If a lower voltage does not extend life, why has EVGA not simply increased the voltage from 1.2 Volt to a single higher level, like 1.45 Volt.Quote:
Originally Posted by Orion24
They would have saved on components to do the switching between 2D and 3D.
Nobody does anything without a reason.
The fact that "Most people with the problems never overvolted their cards and were at 1.2V all the time" is no prove against my assumption that a lower voltage extends life.
So to disagree you have to come with something more substantial.
Yup, my mistake here. I thought you were refering to it as the reason why 7900 cards have problems (probably because I was reading another thread that was about it, at the same time)Quote:
Originally Posted by t024484
so the bios version mod only works if you have the new eVGA PCB rev right ? the ones that have that swtiching resistors as shown on the pics? or can we install them our selves
I do not understand what you mean with "bios version mod".Quote:
Originally Posted by Demo
This harware mod works with all the 7900GT boards that have not installed this extra hardware.
What do you mean with switching resistors?
What i ment is, this volt modding via bios only works if you add those missing components on your card and allow voltage swtiching ?
Yes that is true. You have to add three components, and you need to install the right BIOS.Quote:
Originally Posted by Demo
Hi guys , I have a 512 Calibre with a maze4 acetal fitted and I want to volt mod it , can I use the volt mods in this thread or should I use another type of volt mod ? How do I mod the bios for vid1 and 2 ? What bios can I use for my card ? Can I dip switch those bridges to allow the mod to be turned off ? This would not be needed if the vid1/2 mod works , but would be nice if it doesnt .
Any help would be great .
:rolleyes:
What is missing from this post ? You mention hardware parts and dont show where they go . I want to mod my 7900GT Calibre 512 but want to make sure I dont stuff it up . Any help would be great .Quote:
I have made the same voltage switching option to a standard 7900GT. This modification can be applied to any standard 7900GT board. You will need a BIOS that switches from VID 0 in 2D to VID 1 when in 3D mode. You can check if your BIOS does this, with the monitor function of Riva Tuner going from 2D to 3D.
You could use the EVGA 7900GT-SS BIOS for this purpose, but you can just as well change your own BIOS with Nibitor, using the advanced voltage editor.
You will also need some soldering skills.
The components that I used, are 2 dual schottky diodes, type BAT54C, and 1 N type Mosfet BSS670S2L, that's all. I bought them from Farnell.com.
Any dual schottky diode with common cathode will do , and any low power N channel Mosfet with less then 10 Ohm channel resistance when switched on is O.K.
The board in the unmodified state looks like:
And after Modification:
Red gives you +0.05 Volt
Yellow gives +0.1 Volt
Purple gives +0.2 Volt
So with the standard 5Kohm resistor giving you 1.2 Volt in 2D, you can now switch to anything between 1.2 and 1.55 Volt in 3D.
:D
The pictures are erased by xtreme. but they are republished in posting #24.Quote:
Originally Posted by aussie-revhead
I do not know what a calibre 512 looks like, so it will be impossible for me to give you any help without a picture.
The area in question in post #24 looks the same as my Calibre . I saw those pics but where are the dip switches and mosfet involved ?
:rolleyes:
http://imagestore.ugbox.net/thumb/DS...ac4349cab0.jpg
Click to view full-sized image!
Hosted by UGBox Image Store
Nice, good info
What dip switches are you referring to ?Quote:
Originally Posted by aussie-revhead
I soldered two dual schottky diodes and one mosfet on the board, You can see where when comparing the two pictures.