tattude69
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Wondering if white leds on gtx 1080 classified have any diag function? one of them flickered and gpu driver crashed. Reboot all leds are on and no gpu driver crash. Thanks for any assistance
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Cool GTX
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 08:15:48
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the_Scarlet_one
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 09:30:41
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☄ Helpfulby tattude69 2019/02/09 12:29:40
Yes, the do. One is tied to GPU Boltage, one Memory voltage, one to PLL, one to 3.3v, and one to 12v. (Same order as the probe it cable: https://www.evga.com/supp...%20CABLE%20PINOUT.pdf) Usually they are only useful in extreme overclocking so that the user can see the LED’s through the “fog” of the liquid nitrogen or dry ice. I cannot recall what oversee they are in, but normally they won’t flicker with a simple GPU driver crash unless there is something bigger going on with the rig. The best way to find out of the flickering is an issue would be to connect a probe it cable, as shown above, use a multimeter, and check the voltages of the led that is flickering. You only need to utilize one ground, and then you can move to the other connections to verify everything is working.
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bcavnaugh
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 09:50:13
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 09:56:52
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i was not able to get a picture of it. it has only done it once. just concerned me because i have not had one single issue until this. i keep getting an error when i try to go to the link for pinout pdf
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 10:07:00
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ok so i was able to get the pin out picture that you referenced. would that connector be going to the sli terminal? sorry never had to pinout on a gpu. still have gtx 260,660ti,960 and never had to test anything and they all still work. the led was the first one or closest to the back of the case. How do i find out which led is which?
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 10:09:39
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What are you doing on your computer when this happens?
Information about your Computer to allow members to help you.
Motherboard
Make:
Model:
Bios Version:
Is Bios Current Yes or No.
CPU
Model:
Settings:
Memory
Make:
Model:
Settings:
GPU/Video Card
Make:
Model:
Driver Version:
GPU/Video Card
Make:
Model:
Driver Version:
GPU/Video Card
Make:
Model:
Driver Version:
PSU
Make:
Model:
AGE:
Using One PCIe Power Cable or Two Separate PCIe Power Cables?
Location US, EU, Other for Voltage or Power.
Monitor
Make:
Model:
Video Cable Type Used:
Monitor
Make:
Model:
Video Cable Type Used:
Monitor
Make:
Model:
Video Cable Type Used:
TV’s
Make:
Model:
Video Cable Type Used:
Other PCI/PCIe installed Devices
Make:
Model:
Slot Number Installed:
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Other PCI/PCIe installed Devices
Make:
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Slot Number Installed:
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Cool GTX
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Sajin
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 11:29:02
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☼ Best Answerby tattude69 2019/02/09 12:28:25
tattude69
Wondering if white leds on gtx 1080 classified have any diag function? one of them flickered and gpu driver crashed. Reboot all leds are on and no gpu driver crash. Thanks for any assistance
Sounds like your gpu may not be getting good clean stable voltage. Those 5 LED's are voltage indicator lights that can help you diagnose voltage problems with your video card. With the gpu fans facing towards you and the power connectors facing up, the LEDs are, from left to right: GPU - This indicates if voltage to the video card's GPU is good MEM - This indicates if voltage to the video card's memory is good PLL - This indicates if the voltage for auxillary components such as fans, LEDs, etc. is good 3.3V - This indicates if the voltage supplied from the motherboard via PCIe slot is good 12V - This indicates if the voltage from the 12v input from the power supply is good If any of these LED's are not lighting up, it indicates a voltage issue with that component or source. Note: This it how it was on older gen cards. Pretty sure it's the same for newer gen cards as well.
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 11:55:19
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Sorry was trying to do to many things at once. Ok so the first time in days i turned my computer on the very first white led flickered and my graphics driver crashed Restarted system all lights turned on computer worked perfect ran every version of fire strike stress test no issues ran ghost recon wildlands at 4k custom settings no issues. i was hoping it was a fluke or a bad led on the way out but remembered i was told that those leds had diagnostic purpose not cosmetic so now i'm trying to figure the issue out before i have a problem. i am also ordering the pinout cable so i have it system is I7 4790K 4.0G full load 62c Corsair CLC H100i Gigabyte Z97X Gaming 7 Motherboard Bios F8 Evga GTX 1080 Classified 3842-6386 standard driver 418.81 never been hotter then 62c 1721 mhz gpu memory 10.01Gbps 4 Sticks of Crucial DDR3 8GB 1600 MHZ Evga Supernova 650 watt power supply using two separate pcie cables Coolermaster MasterCase Pro5 OCZ SSD 256Gb Western Digital Blue 3TB with Windows 7 service pack 1 completely updated 8 corsair fans only devices on computer usb wifi and xbox one wireless dongle using a 4k Hisense tv as a monitor all drivers and bios updated no software except games, steam,GOG,uplay, i use it only for gaming No overclocks running stock settings
post edited by tattude69 - 2019/02/09 11:57:26
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Sajin
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 12:04:03
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When the issue occurred you were running stock gpu clocks?
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 12:04:51
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Thank you all very much for the info. I realize i'm probably over reacting but in my mind if it did it once it will happen again. Now for the first led which is gpu voltage is that from the power supply cables or the PCI-E slot? What voltage should i have their? I'm hoping best case its my power supply yes stock clocks when it occurred i did just finish clean driver install i am using a powerlink connector between power supply cables and gpu if that matters been using since i got the gpu
post edited by tattude69 - 2019/02/09 12:07:44
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Sajin
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 12:07:07
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The gpu core can get power from both the pci-e slot & the pci-e power cables.
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Sajin
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 12:11:08
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☄ Helpfulby tattude69 2019/02/28 14:03:22
I've seen power links cause issues before. If you encounter the issue again I would recommend removing the power link and retesting for the issue.
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Sajin
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 12:20:20
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Now that I think about it when the driver crashes the gpu voltage will be reset, so that could cause the light to flicker on the gpu. GPU drivers can reset due to software conflicts on a rig. Maybe that is what caused your problem. You can intentionally cause the driver to crash by overclocking the card too high which will cause the driver to crash & recover. While the driver crashes and recovers you can watch the gpu light to see if it flickers when the driver resets.
post edited by Sajin - 2019/02/09 12:23:45
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 12:37:21
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Thank you again. i will do some experimenting in a bit and update. Your last post really makes a lot of sense. Now i feel like i had another Homer moment 
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Sajin
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 12:47:18
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the_Scarlet_one
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 12:50:40
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Tattude69, As far as the pin out, no need to connect to sli. The small adapter connects directly to a header on the GPU that is intended measure voltages. This header is available of some EVGA motherboards and Classified/K|ngp|n GPU’s, but not on normal motherboards or GPU’s  If you have steady hands, you can measure the voltages without the probeit connector. The connector just makes it extremely easy to check. As stated, if this has only ever happened once, it probably isn’t an issue.
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Cool GTX
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 13:17:47
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power link ---> Unplug PC & Make sure the setscrew is Tight on both adapters 
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 13:28:55
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Thank you. i'm ordering the cable my hands just are not steady enough. I'm really hoping Sajin was onto something. I'm going to crash the driver and watch the light. I'm hoping it was just that. It seems logical to me plus its probably only the 3rd or 4th time in a year its actually crashed the driver so it probably has done it before and i just never saw it
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the_Scarlet_one
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/09 13:42:59
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I have had quite a few classified cards, and many crashes during overclocking. More than likely it is nothing to worry about, but I don’t recall one of the LED’s flickering when the crashes occurred, but I have pushed the card way too hard and had three of the leds shut off completely. This is the cable if you decide to test with a multimeter. https://www.evga.com/prod...aspx?pn=W002-00-000010
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/20 05:30:18
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Sorry had no time to troubleshoot. today i was able to check some things. removed GPU checked connector on GPU and motherboard, inspected all cables and set screws on power link no problem found. first led light flickers no rhyme or reason.
Forcing a GPU crash does not make light change in anyway. when i saw this previously must of been a fluke. Next step is going to grab another power supply and see if that makes any difference. i'm really starting to thing its just a bad led. GPU seems to work normally with games and benchmarks
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/27 12:00:28
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Can anyone tell me if I should be concerned about this? The first white diag led flickers it seems I can make it happening by moving the mouse. I'm blown away I've been using the computer for a year no problems only change was removing led fans to to non led fans on case saw this when I removed card motherboard looks perfect
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/27 12:02:24
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It does not looked burned just different color especially compared to other side
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Sajin
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/27 12:10:15
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/27 12:20:57
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Any thoughts on why using usb mouse would make the first white led flicker. i screwed up and ordered the wrong cable for voltage check without im worried if i try to pin test ill short something. finally had some time to do some diag. today i've have removed all hard drives installed new single samsung ssd 860 fresh install of windows 10. unplugged usb wifi xbox one usb adapter. the only other power supply i have access to is way to small for system. all connectors look perfect switched gpu power wires to spots 3 and 4 on power supply still no change
post edited by tattude69 - 2019/02/27 12:25:23
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Sajin
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/27 12:33:09
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tattude69
Any thoughts on why using usb mouse would make the first white led flicker.
Nope. Kinda strange if you ask me.
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tattude69
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/27 19:26:01
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Well you were right at the beginning Sajin the powerlink was creating a voltage drop. No physical damage screws tight on connectors. Thank you for your help and patience.
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Sajin
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Re: Do the white LEDS on the backing plate of a gtx 1080 classified have any diag purpose?
2019/02/27 19:37:35
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☄ Helpfulby tattude69 2019/02/28 14:03:03
No problem. 
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