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View Full Version : Can I force higher fan speeds on my eVGA 7900GTX


kwynjunk
05-26-06, 05:52 PM
Can I force higher fan speeds on my eVGA 7900GTX?

if so, how?

SLippe
05-26-06, 06:35 PM
The new Rivatuner you can or at least put them at 100% 24/7.

john19055
05-27-06, 03:02 AM
On the EVGA 7900GTX's they are already set to 100% in 2D and 3D.in the Bios.

kwynjunk
05-27-06, 09:06 AM
On the EVGA 7900GTX's they are already set to 100% in 2D and 3D.in the Bios.

yup. just noticed that after I downloaded Rivatuner

Darkoz
05-27-06, 12:14 PM
On the EVGA 7900GTX's they are already set to 100% in 2D and 3D.in the Bios.

That doesn't necessarily mean that the fan is running 100% all the time.
The BIOS on my 7800GTX 512MB which uses the same HSF as the 7900 shows the fan set to 100% in all three modes 2D/3D/3D Performance and yet the fan still varies depending on temperature.

In 2D it spins at 1000rpm and can go up to 2500rpm depending on the temp. during gaming and can get quite loud.
I can't work out why it shows 100% in all 3 modes in the BIOS when clearly the fan is not continually running at 100%

jAkUp
05-27-06, 01:27 PM
I think if the temp sensor is implemented on a hardware level, you will not be able to change the fan settings.

blurp
05-27-06, 09:44 PM
I have a PNY 7900 GTX. Using the fabulous new Rivatuner, I was able (using the tutorial in the FAQ section in the ReadMe) to adjust Fan speed according to core speed. At low speed I put it at 48 % then when Rivatuner detect a frequency increase, the fan goes to 75 %. Awesome.

Moreover, using Rivatuner Statistic Server, I can follow my FPS (i know Fraps can do this too) AND my GPU temp. Aewsome too.


Read this from RT ReadMe:

Q: I know that my GeForce 7800GTX uses temperature based fan controlled via ADT7473, so driver-level fan control tab providing separate 2D/3D fan speed adjustment via the ForceWare driver doesn't work on my system. However I'd really like to force it to run at constant different speeds in 2D and 3D modes. Is it possible to do it with RivaTuner?
A: Yes. RivaTuner provides you powerful and flexible monitoring thresholds technique, which can be used to implement sophisticated dynamic fan speed and overclocking algorithms. You can use it to force your fan to run at different speeds in 2D and 3D modes. To do it perform the following sequence of actions:

1. Open low-level fan control tab.
2. Configure desired fan settings for 3D mode (e.g. fixed 100% duty cycle) and save them to low-level fan profile, e.g. "3D fan settings".
3. Configure desired fan settings for 2D mode (e.g. fixed 50% duty cycle) and save them to low-level fan profile, e.g. "2D fan settings".
4. Open launcher tab and add new regular item, e.g. "apply 3D fan settings".
5. Tick "Associated fan profile" and select low-level fan profile type.
6. Select desired low-level fan profile, e.g. "3D fan settings" and finalize adding new launcher item by pressing OK button.
7. Open launcher tab and add new regular item, e.g. "apply 2D fan settings".
8. Tick "Associated fan profile" and select low-level fan profile type.
9. Select desired low-level fan profile, e.g. "2D fan settings" and finalize adding new launcher item by pressing OK button
10. Open low-level hardware monitoring module and right click "Core clock" graph, then select "Setup" from the popup menu. Take a note that we'll define threshold on core clock for detecting switching between 2D and 3D modes.
11. Add new threshold, e.g. "3D mode detection threshold" and define threshold value. Considering that default 2D core clock for 7800GTX is below 300MHz and default 3D core clock is above 400MHz, you may set the threshold value to 300MHz.
12. Configure threshold to launch "apply 3D fan settings" item on upward crossing. This will cause RivaTuner's hardware monitoring module to apply it anytime when clock is changed from <300MHz to >=300MHz (i.e. anytime when 3D application is started).
13. Configure threshold to launch "apply 2D fan settings" item on downward crossing. This will cause RivaTuner's hardware monitoring module to apply it anytime when clock is changed from >300MHz to <=300MHz (i.e. anytime when 3D application is closed).

SLippe
05-28-06, 01:11 AM
Okay, didn't know that about the GTX's. With Rivatuner, I can hear the fan switching when I mess with the sliders, pretty cool. Anyways, I have mine set at 100% and yes, it's a little loud, but fits right in with the rest of my fans. It dropped my temp on my card by 4 degrees at idle.

snowmanwithahat
05-28-06, 11:18 AM
I think if the temp sensor is implemented on a hardware level, you will not be able to change the fan settings.

right, that's why it would say 100% all the time, if you did change it to like 50% you'd really kill the fan speeds, because when it got cooler instead of being 1,000 RPM it'd limit it to 500 RPM, and morethan likely it'd be very inadequit, it seems like it has 2 different layers of control, and you probably won't be able to change the hardware sensor

blurp
05-29-06, 07:24 AM
right, that's why it would say 100% all the time, if you did change it to like 50% you'd really kill the fan speeds, because when it got cooler instead of being 1,000 RPM it'd limit it to 500 RPM, and morethan likely it'd be very inadequit, it seems like it has 2 different layers of control, and you probably won't be able to change the hardware sensor

Using Rivatuner I increase automaticly fan speed from approx 1000RPM (48 %) to 1800 RPM (80 %) when 3D applications starts. I reduced load temps from 64-66 to 54-56. This management is much efficient.

ShadowKing
06-10-06, 06:19 PM
Hi,

Well..... After RMA-ing 3 bs 7900gt:thumbdwn: (arti's, bsod, black/desktop flickering and random blue letters that once were whit...) cards i decided to go up a notch and buying the ASUS EN7900GTX. After benching with my new card I still noticed that the GPU (using ATITOOL to monitor and log) went up in the high 60's and when benching deep freeze (you know, where those bs 7900gt cards failed terribly) it even went upt to 70 -72 degrees C. So I started to check out the rivatuner, which works, but a little too complicated for such a small adjustment.

Looking at the board there is a small molex type (the ones we used to use for attaching a cd-rom drive to the motherboard.... 386/486 types). When you jank out the yellow and the black and stick them in the same colors of a normal molex-jack, jou get the full 100% throttle.... Little did I know...

I never check out the drivers on the CD for any new device, as they usually are already outdated when shipped... But I thought i'd give it a go... As it turns out there is a utility made by ASUS that does all of it for you. It's called smartdoctor and with it you can alter fan speeds, set clocks measure RAM temperatures etc etc etc....

After setting the fan control to 100% it never got out of the 55 degrees C... :D

So maybe this won;t work on your eVGA videocannon.... bet hey, it might just work.