- Joined
- Aug 27, 2004
- Location
- Switzerland
7900GTO Thread (Flash + Vmod instructions here)
Well, the review thread is getting a bit hijacked, so I thought it'd be better to make another thread were we can post our OC results, questions, and so forth. So please post your OC (stable), and any other relevant information, voltmods, BIOS, Brand, etc, so I can make a neat list.
7900GTO OCing results:
User----------Brand----------Clocks------------Voltage---------------Cooling------BIOS
Dan0512-----MSI-------------715/850----------stock/1.94----------stock--------7900GTX
Crimedog----***-------------720/840----------stock-----------------H20----------***
Nandro------***--------------725/825----------stock/??--------------***----------***
stereo555---EVGA-----------702/770-----------***------------------stock--------stock
reboot--------EVGA-----------707/805----------stock----------------stock--------stock
xSeongminx--***------------725/890-----------***------------------***---------stock
wundi---------MSI-------------690/860-----------***------------------***----------7900GTX
Neural Net---MSI-------------729/756-----------***------------------***----------***
electronpn---MSI-------------690/800-----------***------------------***----------7900GTX
tam------------MSI-------------703/732-----------***------------------***----------***
Raptord--------MSI-----------690/800-----------***------------------***-----------***
WolfeR---------EVGA----------720/880-----------***------------------***----------7900GTX
[SC]Ceasar---***-----------693/729-----------***------------------***-----------***
***=not specified; ?= V-mod present, voltage not specified
Calculated average OC: 708.47 / 810.71
So that's pretty much the frequency to expect if you get a card, but remember that YRMV.
BIOS Files-If you want to flash to GTX
NVFlash-Program to flash Nvidia cards
Nibitor-Program to edit BIOS
I've attached a zip file that contains everything you need to flash your card as well!
7900GTO Memory Voltmod guide
Ok, you'll be working on the backside of your 7900. The blue square shows which part of the card the lower photo corresponds to, same perspective of course. You'll be penciling the resistor circled in red, and the spot marked in blue is explained in the next paragraph. (this is my card BTW):
Circled in red is the resistor Q511. It has a resistance of 1000 Ohms, which corresponds to a voltage of around ~1.81. To raise the voltage, you have to lower it's resistance with a pencil. According to my results, following resistances will yield the following respective voltages (scroll under pic):
To measure the voltage, you have to contact the end of the resistor circled in blue. Positive lead on the resistor, and negative on ground (case for example). This has to be done while the PC is running of course.
Resistance (in Ohms).........Voltage
940................................1.87
900................................1.90
880................................1.92
852................................1.95
818................................1.98
770................................2.03
Remember that those are my results... and I do NOT know if they apply for every single GTO card out there. Be cautios, lower the resistance on small steps... and measure the voltage each time you lower it.
I was told that the resistance in the 7900gtx is 560 Ohms for 2.15v, but I don't think that's accurate since the voltage seems to increase in .01v increments as one lowers the resistance by 10 Ohms. If that pattern were to apply up to 560ohm... then I think you'd end up with way more than 2.15v.
That resistor is very small, so you need a steady hand to work on it. IMO it was easier for me using a harder pencil, since I could apply more pressure and have a smaller point. For my mod, I used a 3H pencil.
7900GTO GPU Voltmod guide:
Well, this section is sadly empty since to date I haven't been able to find any concrete information on a safe way to voltmod the GPU.
I've gathered though some important information, and that is, that basically like for the GTX, there is no way to increase the voltage with a pencil, one has to do it by means of a soldering iron and some resistances.
Some of you might ask why I just don't assume the GPU voltmod for the GTO is the exact same one of the GTX. The answer is, we're dealing with some expensive hardware here, and I don't like assumptions when it comes to modding very expensive hardware. The mod itself is very complicated for most hobby pencil modders out there.
If you still want to try the GTX mod, I suggest you head over to vr-zone.com, you should find a good GPU 7900gtx voltmod article there.
And, if you have any information regarding a pencil GPU mod, or another mod that has been confirmed for the GTO as well, please share your knowledge with all of us.
Setting fan speed
If you're having trouble setting the fan speed, read the following post (please don't read the text, just pay attention to the images)
http://www.ocforums.com/showpost.php?p=5085073&postcount=6
Dan
Well, the review thread is getting a bit hijacked, so I thought it'd be better to make another thread were we can post our OC results, questions, and so forth. So please post your OC (stable), and any other relevant information, voltmods, BIOS, Brand, etc, so I can make a neat list.
7900GTO OCing results:
User----------Brand----------Clocks------------Voltage---------------Cooling------BIOS
Dan0512-----MSI-------------715/850----------stock/1.94----------stock--------7900GTX
Crimedog----***-------------720/840----------stock-----------------H20----------***
Nandro------***--------------725/825----------stock/??--------------***----------***
stereo555---EVGA-----------702/770-----------***------------------stock--------stock
reboot--------EVGA-----------707/805----------stock----------------stock--------stock
xSeongminx--***------------725/890-----------***------------------***---------stock
wundi---------MSI-------------690/860-----------***------------------***----------7900GTX
Neural Net---MSI-------------729/756-----------***------------------***----------***
electronpn---MSI-------------690/800-----------***------------------***----------7900GTX
tam------------MSI-------------703/732-----------***------------------***----------***
Raptord--------MSI-----------690/800-----------***------------------***-----------***
WolfeR---------EVGA----------720/880-----------***------------------***----------7900GTX
[SC]Ceasar---***-----------693/729-----------***------------------***-----------***
***=not specified; ?= V-mod present, voltage not specified
Calculated average OC: 708.47 / 810.71
So that's pretty much the frequency to expect if you get a card, but remember that YRMV.
BIOS Files-If you want to flash to GTX
NVFlash-Program to flash Nvidia cards
Nibitor-Program to edit BIOS
I've attached a zip file that contains everything you need to flash your card as well!
7900GTO Memory Voltmod guide
Ok, you'll be working on the backside of your 7900. The blue square shows which part of the card the lower photo corresponds to, same perspective of course. You'll be penciling the resistor circled in red, and the spot marked in blue is explained in the next paragraph. (this is my card BTW):
Circled in red is the resistor Q511. It has a resistance of 1000 Ohms, which corresponds to a voltage of around ~1.81. To raise the voltage, you have to lower it's resistance with a pencil. According to my results, following resistances will yield the following respective voltages (scroll under pic):
To measure the voltage, you have to contact the end of the resistor circled in blue. Positive lead on the resistor, and negative on ground (case for example). This has to be done while the PC is running of course.
Resistance (in Ohms).........Voltage
940................................1.87
900................................1.90
880................................1.92
852................................1.95
818................................1.98
770................................2.03
Remember that those are my results... and I do NOT know if they apply for every single GTO card out there. Be cautios, lower the resistance on small steps... and measure the voltage each time you lower it.
I was told that the resistance in the 7900gtx is 560 Ohms for 2.15v, but I don't think that's accurate since the voltage seems to increase in .01v increments as one lowers the resistance by 10 Ohms. If that pattern were to apply up to 560ohm... then I think you'd end up with way more than 2.15v.
That resistor is very small, so you need a steady hand to work on it. IMO it was easier for me using a harder pencil, since I could apply more pressure and have a smaller point. For my mod, I used a 3H pencil.
7900GTO GPU Voltmod guide:
Well, this section is sadly empty since to date I haven't been able to find any concrete information on a safe way to voltmod the GPU.
I've gathered though some important information, and that is, that basically like for the GTX, there is no way to increase the voltage with a pencil, one has to do it by means of a soldering iron and some resistances.
Some of you might ask why I just don't assume the GPU voltmod for the GTO is the exact same one of the GTX. The answer is, we're dealing with some expensive hardware here, and I don't like assumptions when it comes to modding very expensive hardware. The mod itself is very complicated for most hobby pencil modders out there.
If you still want to try the GTX mod, I suggest you head over to vr-zone.com, you should find a good GPU 7900gtx voltmod article there.
And, if you have any information regarding a pencil GPU mod, or another mod that has been confirmed for the GTO as well, please share your knowledge with all of us.
Setting fan speed
If you're having trouble setting the fan speed, read the following post (please don't read the text, just pay attention to the images)
http://www.ocforums.com/showpost.php?p=5085073&postcount=6
Dan
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