SPCR

I saw this trick over in the Guru3d forums.

To get RivaTuner 15.8 to work with the 7600GT and 7900GT navigate to Power User, System, ForceVGADeviceID and enter 92. That is the code for a 7800GTX. RivaTuner will exit.

Restart and it recognized my XFX 7600GT as NV4B(A2,12x1,5vp) with 256mb DDR2. Not exactly right, but sort of close.

Navigate to driver settings, Customize, click on the first icon (video card) and select the Fan tab. Set the sliders to whatever you want, check apply at starup and save. I am using 25,25,43. Listen to the noise subside.

25% is fairly decent at idle. 43% is definitely audible, but not obnoxious. Remember, games make their own noises to mask this. Cooling performance is obviously not stellar, but it will keep the card within its safe operating range.

This has been tested using XP 64-bit. If it works for you in 32-bit XP please post. Be very careful about other settings or you may find yourself high over the Pacific Ocean and not in a Jet.

I have not decided if this is a permanent solution, but it will hold until the new AC passive cooler is out, or RivaTuner has official support for the new cards.

PS,

Yoou may find that the code 43 works better for a 7600GT.

It worked perfectly on my MSI 7600GT.

Thanks a bunch.

P.S. I used the 43 and 32-bit windows (switched back from 64-bit due to bad driver support).

are there any VID options in there, once the card is recognised?

mattthemuppet wrote:are there any VID options in there, once the card is recognised?

Please explain. However, I would be very careful as you are telling the program the card is a 6800 or a 7800 or something and it might make a mistake.

I'm no expert (all my ideas come from frostedflakes, especially his recent post about undervolting VGA cards), but I think that 6series cards and above have different voltage settings depending on VGA use (2D, 3D etc). The 2D voltage (VID value) is usually lower, so you can theoretically undervolt in 3D by telling it to use the lower, 2D value. Sometimes there are even lower voltages, so you can undervolt in 2D AND 3D. So far I don't think anyone's managed to do this with a 7 series card due to the recognition problems with NiBiTor, hence the interest

However, I haven't even progressed to a 6 series card (looks resentfully at FX5200 puttering away in PC) so this is all theory to me!

There is a Core VID option under power users. I don't know if the 7600T can be reprogramed this way, and I would not try it until there is official support, or perhaps never. All that I have seen about 7600GT voltage mods has involved replacing a resistor, or hacking it with a pencil to reduce the value. Both look like good ways to bork the card.

I think the pencil trick's usually used for increasing the voltage to overclock (it is on ATI cards at least). It'd be interesting to know what Core VID values there are and to post them on this thread, even if you don't want to change them yourself (understandably!).

I didn't realize RivaTuner had VID options, I'll have to look into it for my 7900GT. Probably won't have any better luck than I had with NiBiTor, but it's worth a shot.

And would definitely be interested to see some 7600GT undervolting results, if anybody tries it be sure to post them in my thread. An 0.05V drop isn't huge, but every little bit can help. And who knows, maybe there are lower VID available we just don't know about.

mattthemuppet wrote:I think the pencil trick's usually used for increasing the voltage to overclock (it is on ATI cards at least). It'd be interesting to know what Core VID values there are and to post them on this thread, even if you don't want to change them yourself (understandably!).

The numbers under the power user options aren't voltage numbers, so you don't really have use for them. I too have to say, that I am not going to temper with them before the official support. I have already caused couple of crashes to rivatuner "exploring". I don't even see it as very productive for myself, as the gpu is running 51 celsius and I am currently gaming and have reduced the fanspeed to 48%,

FYI: RivaTuner only works if the account has administrator status.

I have tried this with my 7900GT and the fan speed does not change. It is my understanding that most if not all 7900GT (which use standard PCB) does not have nay fan speed control hardware so software support doesn't matter. My suggestion is that you change your heading and remove the mention of the 7900GT as they you will never be able to change the fan speed on most of them.

Live: The post where I got this idea was from someone who was able to change the fan speed on a 7900GT.

diver wrote:Live: The post where I got this idea was from someone who was able to change the fan speed on a 7900GT.

Thats funny cause the creator of rivatuner Unwinder has this to say:

Actually I've not yet seen any 7900GTs able to adjust fan speed. So either the fan control scheme is ripped from the PCB by design (most likely) or all 7900GT I've seen are affected by the same faulty transistor issue like 7800GT (unlikely).

http://forums.guru3d.com/showpost.php?p ... stcount=17

And this:

None of 7900GTs (including NV's reference 7900GT samples) I've seen was able to change the speed, the fan just seem to be fed with 12V instead of programmed fan control circuit.

http://forums.guru3d.com/showpost.php?p ... tcount=115

Live:

I don't have time for this.

RivaTuner RC 16 to be out on May 22nd with support for 7300, 7600 and 7900 series cards, drivers through 84.56 and tons of new stuff.

http://forums.guru3d.com/showthread.php?t=182114

Live:

Unwinder has since posted that there are indeed some 7900GT's with working fan control.

"some 7900GT's" is actually just the eVGA 7900GT.

Yeah, and the Evga 7900GT is not exactly some oddball card sold only in Korea.

diver wrote:Yeah, and the Evga 7900GT is not exactly some oddball card sold only in Korea.

No it is not but then again not all Evga 7900GT have fan control just some of them.

Live wrote:

diver wrote:Yeah, and the Evga 7900GT is not exactly some oddball card sold only in Korea.

No it is not but then again not all Evga 7900GT have fan control just some of them.

That would be fine, except that your point was none of the 7900GT's had fan control and you turned out to be wrong.

diver wrote:That would be fine, except that your point was none of the 7900GT's had fan control and you turned out to be wrong.

Heh?

I wrote:

It is my understanding that most if not all 7900GT (which use standard PCB)

and:

My suggestion is that you change your heading and remove the mention of the 7900GT as they you will never be able to change the fan speed on most of them.

See the word most in there?

Then I quoted the author of the program you suggest to use for changing the fan speeds. He stated he believed the fan control is striped from the standard PCB. I believe he is right and that EVGA used a custom one on some of their cards. So my suggestion to you still stands.

come on guys, let it rest - this is getting boring.

Next time I am in Uppsala....

.....I will enjoy the weather

which has got to be cooler than it is here in Houston.


Same if I ever get to stop in NZ, you lucky dogs...

And the next time I have a good idea, I won't bother anyone around here about it, because I don't need to hear if any, hardly any, none, most all of, or any other uncountable quantity of VGA card does this or that from anyone who has nothing beter than that to contribute,

ha - you want to come to NZ for the weather?! you've gotta be nuts, the weather changes here (usually for the worst) so frequently I usually just wear water+windproofs out of principle

diver wrote:I saw this trick over in the Guru3d forums.

To get RivaTuner 15.8 to work with the 7600GT and 7900GT navigate to Power User, System, ForceVGADeviceID and enter 92. That is the code for a 7800GTX. RivaTuner will exit.

Restart and it recognized my XFX 7600GT as NV4B(A2,12x1,5vp) with 256mb DDR2. Not exactly right, but sort of close.

Navigate to driver settings, Customize, click on the first icon (video card) and select the Fan tab. Set the sliders to whatever you want, check apply at starup and save. I am using 25,25,43. Listen to the noise subside.

25% is fairly decent at idle. 43% is definitely audible, but not obnoxious. Remember, games make their own noises to mask this. Cooling performance is obviously not stellar, but it will keep the card within its safe operating range.

This has been tested using XP 64-bit. If it works for you in 32-bit XP please post. Be very careful about other settings or you may find yourself high over the Pacific Ocean and not in a Jet.

I have not decided if this is a permanent solution, but it will hold until the new AC passive cooler is out, or RivaTuner has official support for the new cards.

How much has the decrease in fan speed affected temperatures? Also, what were the original fan speed % settings, out of interest?

Please keep bothering us, diver, some of us appreciate it.

Update: RivaTuner C16 is out, making this trick obsolete.

Assasin: Idle temperature went up about 3C witha 25% fan speed, just enough to get rid of the annoying constant whine.

I experimented with 3d settings of 35% o 48%. All are audible and are only tolerable if the sound from a game is louder. The 35% setting produced 76C under heavy loads while the room was 27C.

While that may seem hot, the card will run for longer that I can without any problem.

For me this was a temporary solution as I have gone back to the Zalman ZM80D-HP and its rotten mounting system, possibly improved with Loctite.

Thanks for your reply diver!! Hmm, I need to do a bit of thinking - I live in a cool climate (North of England) so I can't see my room temperature getting as hot as yours (i.e 27C), so I may just attempt to lower the fan speeds on a reference fan card and save myself a bit of money, especially as I could get away with not getting too high load temperatures.... all depends on the individual card of course, but that 35% figure of 76C with the room that warm looks promising for me!