GTX 980 stable in furmark and gpu_burn but 'falls off the bus' in games

GTX 980 stable in furmark and gpu_burn but ‘falls off the bus’ in games within 10 minutes (usually much sooner) - specifically I’ve tested with GTA V and XCOM 2. I would appreciate any strategies to try if anyone has ideas.

Here’s what I’ve tried:
Upgraded to driver 510.47.03.
Tried various kernel parameters such as disable drm, set CPU state, disable modeset.
Underclocked using nvidia-smi to match nvidia reference power limit (165w) and nvidia reference clocks (3505,1215).

fallen off the bus falling falls no signal

I don’t know what it means ‘falls off the bus’

could you explain it in another way? i also have a 980 asus strix, my gpu has a much lower performance than windows.

for example overwatch on windows 180 fps stable but on linux it stays below 144fps
in kovaaks i have 450 fps in windows and in linux is below 320

my temperature is fine it doesn’t reach 55º C and the clocks are always on high performance

‘Falls off the bus’ is a reference to NVIDIA’s error message.

Feb 05 21:30:39 myhostname kernel: NVRM: GPU at PCI:0000:01:00: GPU-98d8b340-b34f-3042-f74f-49d5ebd02011
Feb 05 21:30:39 myhostname kernel: NVRM: Xid (PCI:0000:01:00): 79, pid=251, GPU has fallen off the bus.
Feb 05 21:30:39 myhostname kernel: NVRM: GPU 0000:01:00.0: GPU has fallen off the bus.
Feb 05 21:31:08 myhostname audit[239218]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=2 pid=239218 comm="GpuWatchdog" exe="/home/myusername/.steam/debian-installation/ubuntu12_64/steamwebhelper" sig=11 res=1
Feb 05 21:31:08 myhostname kernel: show_signal_msg: 1453 callbacks suppressed
Feb 05 21:31:08 myhostname kernel: GpuWatchdog[239229]: segfault at 0 ip 00007fd2963ccb5f sp 00007fd28cadc400 error 6 in[7fd292192000+6f56000]
Feb 05 21:31:08 myhostname kernel: Code: 89 de e8 54 36 8e fe 80 7d cf 00 79 09 48 8b 7d b8 e8 65 54 d1 02 41 8b 84 24 e0 00 00 00 89 45 b8 48 8d 7d b8 e8 61 65 dc fb <c7> 04 25 00 00 00 00 37 13 00 00 48 83 c4 38 5b 41 5c 41 5d 41 5e

Sounds like a problem with the psu, running furmark+gpu_burn will only stress the gpu. While gaming, the cpu will also draw more power.

It’s stable with all cores at 100% in mprime while running furmark extreme burn mode. I just re-pasted it and re-seated it, but that didn’t help. Crashed within 2 min of starting up XCOM 2. Same error - ‘has fallen off the bus’.

Tested with a 1000W PSU today. It didn’t help.

Did you already try to reseat the gpu in its pcie slot? Please check if you can lower pcie speeds to gen2 in bios to check for bus issues.

Yes I reseated the card after I removed it to redo the thermal paste. I just tried dropping my PCI-e speed to Gen 2 and then to Gen 1. I also disabled all my CPU power saving options and there was an option for powering down GPU cores at idle or something I disabled too. I think it was only related to iGPU, but just in case I disabled it.

None of that helped.