Fan % speed is correct, but its ON/OFF setting is not right

Hi friends!
I hope I will explain this best as I can.

I have Gainward GTX 650Ti BOOST2 card, and it has been working flawlessly for a year and a half.

I don’t know what changed in last month, but with both 331.89 and 343.22 the card overheats.

When I open my nvidia-settings I can see that GPU temp is really high, and ‘Speed (%)’ does says that the fan should be high as well, but the ‘Speed (RPM)’ is sitting at zero.
If I ignore this and keep on playing a game or something, my driver would crash and I would get black screen - possible because my GPU temp goes over 100 degrees (sometimes the PC hangs, other times I can hear stuff going on in background).

If I stop playing and relieve the GPU, it would sit at that temperature and given enough time the fan would spin up and cool out the card. After that the fan will go again to a complete stop and the cycle repeats.

-I checked to see if my card is dusty but it is completely clean and the fan is moving with ease, so it shouldn’t be physical obstruction issue.
-I also checked to see if any cables could interfere with the card’s fan and there aren’t any
-I also tried to see if there is a pattern, or exact amount of time at which the fan will turn on or off, but it doesn’t seem to be the case.
-I also tried to see if manual speed control would make a difference (using ‘Coolbits 4’), it is completely the same with either max fan speed (73%) or the min fan speed (30%)

Please advice what next, because I cannot think of any further diagnostic steps that I can make.

Thanks in advance,
Momcilo.
nvidia-bug-report.log.gz (251 KB)

i made you a post with detailed intructions and pictures but this form wont let me poast it, it says im not alowd yet. do you know how to become allowd to post with images??

Oh man… that sucks.

I am new as well to this forum, so I don’t know if there is a way to post images.

If you can just explain what should I look into - at least then I can maybe find the information myself… I don’t know.

Any advice would help, even if it is not perfect.

Thanks man!

You can use the file attachment paper clip icon when hovering the mouse over one of your submitted posts.

ok, so i mod/hack things alot, my advice would be if you wanna crazy solution that will work.

it also just happens i have a fried gtx 650 ti boost to give visual reference

PART 1.
I would get a good thermal past and re do the heat sink on your gpu, i recommend arctic silver 5.
IF YOU CARE FOR THE CARD I HIGHLY RECOMMEND WORKING ON TOP OF A ANTI STATIC BAG OR WORK BENCH.
REMOVE SCREWS ON BACK OF BOARD, ONLY SCREWS PAINTED TO NEED REMOVED.

http://i.imgur.com/OY0piyH.jpg

GPU WILL BE A LITTLE HARD TO PULL APART THE FIRST TIME, BE SHURE TO OPEN LIKE A BOOK WITH THE TOP OF THE CARD BEING THE SPINE. BE SURE NOT TO LOOSE THE VRAM COOLING PADS.

http://i.imgur.com/TcQSMzF.jpg

NOW YOU NEED TO CLEAN OFF YOU GPU, AND HEAT SINK. THE RESULT SHOULD LOOK LIKE THIS.
http://i.imgur.com/iLIyjR9.jpg

NOW APPLY THE THERMAL PASTE. NORMALLY YOU WOULD USE ABOUT THE SIZE OF A PEE BUT THE 650 HAS A SMALL AREA FOR CONTACT WITH THE HEAT SINK, SO USE HALF. YOU DO NOT NEED TO SPREAD IT, IT WILL SPREAD WHEN YOU RE ASSEMBLE, MINE JUST LOOKS LIKE THAT BECAUSE I USED CHEEP CERAMIC THERMAL PASTE.
http://i.imgur.com/TfqXSoW.jpg

REASSEMBLE AND TEST, IF OVERHEAT STOPS THEN YOU ARE GOOD. IF NOT, GO TO NEXT STEP.
http://i.imgur.com/lBQShE8.jpg

PART 2.
RE DISASSEMBLE, UNPLUG GPU FAN. [AND ALSO NOTE THE EVEN SPREAD OF THERMAL PASTE.]
http://i.imgur.com/Ddoa9kB.jpg

IF THE NOTCH IS FACING UP, TAKE PIN 3 AND 4 AND FEED 2 WIRES, BREAD TWIST TIES, OR WHAT EVER IN THEM.
http://i.imgur.com/12A2RI8.jpg

YOU CAN USE A 9V BATTERY TO QUICKLY CONFIRM YOU GOT THIS RIGHT, THIS IS LOW VOLTAGE AND AMPERAGE SO IF YOU GOT IT WRONG YOU ARE LESS LIKELY TO FRY SOMETHING IN THE FAN.
http://i.imgur.com/xYBnxhS.jpg

NOW THERE ARE 2 WAYS YOU COULD RUN THIS, THIS IS BEST WAY IF POSSIBLE. SCRAP SOME KIND OF 4 PIN CABLE OR CRAPPY CPU FAN FOR ITS CABLE, YOU CAN JUST USE 4 WIRES AND ELECTRIC TAPE OR HOT GLUE TO CONNECT THEM NEVER CUTTING A CABLE. (IF YOU WANT MY WIRE ITS 3$ A ROLE @ RADIO SHACK)
http://i.imgur.com/89cLMmS.jpg

BE SURE THE STRIP THE WIRES LONG ENOUGH TO GET GOOD CONTACT BUT NOT POKE OUT ON THE OTHER SIDE OF THE CONNECTOR OR THEY COULD TOUCH EACH OTHER AND SHORT OUT. THEN WRAP SOME TAPE AROUND THEM TO KEEP THEM TOGETHER.
http://i.imgur.com/4Y93P7D.jpg

TUCK THE CABLE INSIDE THE HEAT SINK, AND RE ASEMBE.
http://i.imgur.com/FIYjdd6.jpg

NOW YOU CAN PLUG THE GPU FAN INTO YOUR MOTHERBOARDS 4PIN FAN WITH SPEED CONTROL AND RPM READOUT. IF YOU DONT HAVE 4 AVAILABLE PIN THEN YOU CAN USE 3 PIN LIKE THIS. IF FAN DONT RUN AND YOUR 100% SURE YOU DID IT RIGHT THEN DISCONNECT THE RPM READ OUT CABLE.
http://i.imgur.com/24LiGwL.jpg

THE SECOND METHOD OF THIS IS RUNNING YOUR FAN STRAIGHT OFF OF MOLEX. IF YOU WANTED 2 SPEEDS YOU COULD RUN A SWITCH WERE THE CENTER TAP IS THE FAN, ONE SIDE IS 12V, AND THE OTHER IS 5V. AND GROUND STRAIGHT TO GROUND. I WOULD TELL YOU HOW TO USE THE SPEED CONTROL BUT I HAVEN’T LOOKED INTO HOW IT WORKS.
http://i.imgur.com/brZ68v4.jpg

Well, i hope out of all of this something helps you out. If it works or you need more ideas let me know.

I pasted what i typed in word and replaced /img with /link, so atleast its somthing.

Thanks man for such a detailed explanation.

I am not really looking for a hack, this is almost new card and is still covered by warranty. I want to find the source of the problem, so we (as a community) can address it.

Thank you for your time anyway.

I feel this is happening to other people, I am not sure though:
https://devtalk.nvidia.com/default/topic/774228/linux/340-32-driver-linux-mint-17-freezing/

Hm… I just tested the card with Windows 7 and latest NVIDIA drivers…

It acts completely the same!

So, it must be that the card is faulty. I will return it to the shop.

Thanks for all the help friends.

Regards,
Momcilo.

good luck!!

oh btw, i got a gt630, and the oddest thing hapens on it. fanspeed cant go below 50% or above 80$. and it even shows it cant on my fan curve edditor, the 650 was similar, that fan ROARS when you force it to max out. but back the the 630, its a disappointment i cant max out the fans becase the card already runs hotter than my 480 and i wanna overclock it.