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[Official] NVIDIA GTX 780 Owner's Club - Page 1791

post #17901 of 24915
I can't overclock the core frequency of my card. I was playing BF4 and it suddenly downclocked to stock boost frequency and now even after a restart I can't do anything to change it.

I can adjust the memory frequency without any issues.

Any ideas why this is?
post #17902 of 24915
Quote:
Originally Posted by crazysoccerman View Post

I can't overclock the core frequency of my card. I was playing BF4 and it suddenly downclocked to stock boost frequency and now even after a restart I can't do anything to change it.

I can adjust the memory frequency without any issues.

Any ideas why this is?

Stock bios... rolleyes.gif
Try to reinstall drivers after cleaning your system with DDU: http://www.guru3d.com/files_details/display_driver_uninstaller_download.html


Cheers

Ed

(Team skyn3t)
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post #17903 of 24915
I have the custom bios.


I reinstalled the driver and that fixed it.


I'm sure why it happened though. I could downclock the core, but couldn't overclock it.
post #17904 of 24915
Quote:
Originally Posted by crazysoccerman View Post

I have the custom bios.


I reinstalled the driver and that fixed it.


I'm sure why it happened though. I could downclock the core, but couldn't overclock it.

Now that you have fixed it, it time to fix your SIG!! wink.gif
Fill your SIG with your RIG, it helps US to help YOU! thumb.gif
You have a link in my SIG!

Cheers

Ed

(Team skyn3t)
Edited by OccamRazor - 2/28/14 at 6:54pm
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OCZ Agility 3 120GB + Toshiba A100 250GB Western Digital 2TB  Homemade WC (everything on water) ;) W10x64 
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post #17905 of 24915
Hi guys I have a question about temps. I am running a reference GTX 780 with a xspc full cover block. I have more than enough rad for my set up so I don't think that's an issue.(x2 360's,a 240,and a 120 with 15 fans)
I have installed temp sensors on my res and one for ambient air they usually stay 1-1.5c apart.
My question is for people with the same block. At 100% percent load my gpu temps rise quickly to 10c above my coolant temp. After that the coolant and gpu rise together very slowly.
Is 10c above coolant good or should I be able to do better with the xspc block??
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post #17906 of 24915
Hello fellas, I've actually got myself two gtx780 oc version Rev2 with two 8-pins. Which of all the biases should I use? The bios string begins with 80.80.##.## and so on..

So with all of your knowledge, what bios. Right now I've got the gb ghz bios on it from skyn3t that defaults to 1.212v and 1019,5mhz. Both card with very varying ASICS (64.2% & 84.2%) work well up to 1220Mhz and after that it fails to complete unigine Valley and heaven.

Any ideas?
post #17907 of 24915
I swapped to an aftermarket heatsink on my GTX 780, and now the fan speed cycles up and down constantly frown.gif

Looks like the following is happening:
- RPM is so low that the BIOS detects a fan failure.
- BIOS spins fan up to 100%
- RPM is high enough that BIOS allows software fan control again.
- Software fan control drops the RPM
- RPM is so low that the BIOS detects a fan failure
- etc, etc...

Anyone know a fix for this?
Edited by Leapo - 3/1/14 at 2:24pm
post #17908 of 24915
After flashing my 780 i keep getting BIOS reading not supported on this device whenever i try to backup my bios, anyone know how to fix this?
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post #17909 of 24915
Quote:
Originally Posted by Leapo View Post

I swapped to an aftermarket heatsink on my GTX 780, and now the fan speed cycles up and down constantly frown.gif

Looks like the following is happening:
- RPM is so low that the BIOS detects a fan failure.
- BIOS spins fan up to 100%
- RPM is high enough that BIOS allows software fan control again.
- Software fan control drops the RPM
- RPM is so low that the BIOS detects a fan failure
- etc, etc...

Anyone know a fix for this?

Custom fan curve in Precision X or Afterburner?
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My System
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Intel i7-4770K @ 4.5GHz ASUS Maximus VI Hero Z87 Gigabyte GTX 980 Ti G1 Gaming 16GB (2 x 8GB) G.Skill Trident X DDR3-2400 
Hard DriveHard DriveHard DriveHard Drive
750GB Samsung 840EVO 256GB Crucial M4 150GB Velociraptor 1TB Samsung F1 
Optical DriveCoolingOSMonitor
Asus DRW-24B1ST Phanteks PH-TC14PE Win 10 64-bit 27" Qnix QX2710 96Hz 
KeyboardPowerCaseMouse
Cooler Master QuickFire Ultimate Cooler Master V1000 1000W 80+ Gold Fractal Design Arc Midi R2 Logitech G500s 
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post #17910 of 24915
Quote:
Originally Posted by coelacanth View Post

Custom fan curve in Precision X or Afterburner?
Like I said, it's the BIOS detecting a fan fault (due to low RPM) and ramping the fans up to 100% speed. It totally overrides all software fan control when this happens.

Once the BIOS detects that the fan is actually running, it allows software fan control again... which then turns the fans back down to normal RPM... which the BIOS detects as a fault (triggering another ramp to 100%). Round-and-round we go.

A LOT of people have this issue with aftermarket fans on the GTX 780. We need a modified BIOS that allows fan speeds lower than ~1500 RPM without setting a fault condition.

Edit:
If someone could modify this BIOS (from the first post in this thread) to fix this issue, I would be extremely grateful: http://www.overclock.net/attachments/16012
Edited by Leapo - 3/1/14 at 3:06pm
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