Folding Forum

Posted: **Tue May 20, 2014 9:22 am**

Hi,
started folding with only 1 GPU (7970 xfx) it was ok.
When I hooked up the second GPU 280x xfx with an USB extender on an x1 pci slot
second GPU is not getting any load - checked with GPU-Z

win 8.1 64bit
catalyst 14.4
app sdk 2.9
mobo: h81 pro btc
celeron 2 cores
sata hdd WC
client 7.4.4.

The strange thing is that the front end is showing that both of the GPUs are working and advancing and havinf 9 mins TPF. But in the log only one is displayed actually working. A bit confused here. Here's a snapshot: http://s13.postimg.org/gvw3wcpgn/fold.png

Code: Select all

*********************** Log Started 2014-05-19T20:10:27Z ***********************
20:10:27:************************* Folding@home Client *************************
20:10:27:      Website: http://folding.stanford.edu/
20:10:27:    Copyright: (c) 2009-2014 Stanford University
20:10:27:       Author: Joseph Coffland <joseph@cauldrondevelopment.com>
20:10:27:         Args: 
20:10:27:       Config: C:/Users/bgoner/AppData/Roaming/FAHClient/config.xml
20:10:27:******************************** Build ********************************
20:10:27:      Version: 7.4.4
20:10:27:         Date: Mar 4 2014
20:10:27:         Time: 20:26:54
20:10:27:      SVN Rev: 4130
20:10:27:       Branch: fah/trunk/client
20:10:27:     Compiler: Intel(R) C++ MSVC 1500 mode 1200
20:10:27:      Options: /TP /nologo /EHa /Qdiag-disable:4297,4103,1786,279 /Ox -arch:SSE
20:10:27:               /QaxSSE2,SSE3,SSSE3,SSE4.1,SSE4.2 /Qopenmp /Qrestrict /MT /Qmkl
20:10:27:     Platform: win32 XP
20:10:27:         Bits: 32
20:10:27:         Mode: Release
20:10:27:******************************* System ********************************
20:10:27:          CPU: Intel(R) Celeron(R) CPU G1820 @ 2.70GHz
20:10:27:       CPU ID: GenuineIntel Family 6 Model 60 Stepping 3
20:10:27:         CPUs: 2
20:10:27:       Memory: 3.94GiB
20:10:27:  Free Memory: 2.98GiB
20:10:27:      Threads: WINDOWS_THREADS
20:10:27:   OS Version: 6.2
20:10:27:  Has Battery: false
20:10:27:   On Battery: false
20:10:27:   UTC Offset: 3
20:10:27:          PID: 1764
20:10:27:          CWD: C:/Users/bgoner/AppData/Roaming/FAHClient
20:10:27:           OS: Windows 8.1
20:10:27:      OS Arch: AMD64
20:10:27:         GPUs: 2
20:10:27:        GPU 0: ATI:5 Tahiti XT [Radeon R9 200/HD 7900/8970]
20:10:27:        GPU 1: ATI:5 Tahiti XT [Radeon R9 200/HD 7900/8970]
20:10:27:         CUDA: Not detected
20:10:27:Win32 Service: false
20:10:27:***********************************************************************
20:10:27:<config>
20:10:27:  <!-- Network -->
20:10:27:  <proxy v=':8080'/>
20:10:27:
20:10:27:  <!-- Slot Control -->
20:10:27:  <power v='full'/>
20:10:27:
20:10:27:  <!-- User Information -->
20:10:27:  <passkey v='********************************'/>
20:10:27:  <team v='224497'/>
20:10:27:  <user v='senuketo'/>
20:10:27:
20:10:27:  <!-- Folding Slots -->
20:10:27:  <slot id='1' type='GPU'/>
20:10:27:</config>
20:10:27:Trying to access database...
20:10:27:Successfully acquired database lock
20:10:27:Enabled folding slot 01: READY gpu:0:Tahiti XT [Radeon R9 200/HD 7900/8970]
20:10:27:WU01:FS01:Starting
20:10:27:WU01:FS01:Running FahCore: "C:\Program Files (x86)\FAHClient/FAHCoreWrapper.exe" C:/Users/bgoner/AppData/Roaming/FAHClient/cores/web.stanford.edu/~pande/Win32/AMD64/ATI/R600/Core_17.fah/FahCore_17.exe -dir 01 -suffix 01 -version 704 -lifeline 1764 -checkpoint 15 -gpu 0 -gpu-vendor ati
20:10:28:WU01:FS01:Started FahCore on PID 2972
20:10:28:WU01:FS01:Core PID:1432
20:10:28:WU01:FS01:FahCore 0x17 started
20:10:30:WU01:FS01:0x17:*********************** Log Started 2014-05-19T20:10:30Z ***********************
20:10:30:WU01:FS01:0x17:Project: 13001 (Run 24, Clone 9, Gen 2)
20:10:30:WU01:FS01:0x17:Unit: 0x00000008538b3db7532856c67ff27e59
20:10:30:WU01:FS01:0x17:CPU: 0x00000000000000000000000000000000
20:10:30:WU01:FS01:0x17:Machine: 1
20:10:30:WU01:FS01:0x17:Digital signatures verified
20:10:30:WU01:FS01:0x17:Folding@home GPU core17
20:10:30:WU01:FS01:0x17:Version 0.0.52
20:10:30:WU01:FS01:0x17:  Found a checkpoint file
20:11:19:Adding folding slot 00: READY gpu:1:Tahiti XT [Radeon R9 200/HD 7900/8970]
20:11:20:Saving configuration to config.xml
20:11:20:<config>
20:11:20:  <!-- Network -->
20:11:20:  <proxy v=':8080'/>
20:11:20:
20:11:20:  <!-- Slot Control -->
20:11:20:  <power v='full'/>
20:11:20:
20:11:20:  <!-- User Information -->
20:11:20:  <passkey v='********************************'/>
20:11:20:  <team v='224497'/>
20:11:20:  <user v='senuketo'/>
20:11:20:
20:11:20:  <!-- Folding Slots -->
20:11:20:  <slot id='1' type='GPU'/>
20:11:20:  <slot id='0' type='GPU'/>
20:11:20:</config>
20:11:21:WU00:FS00:Connecting to 171.67.108.201:80
20:11:22:WU00:FS00:Assigned to work server 140.163.4.231
20:11:22:WU00:FS00:Requesting new work unit for slot 00: READY gpu:1:Tahiti XT [Radeon R9 200/HD 7900/8970] from 140.163.4.231
20:11:22:WU00:FS00:Connecting to 140.163.4.231:8080
20:11:23:WU00:FS00:Downloading 4.83MiB
20:11:25:WU00:FS00:Download complete
20:11:25:WU00:FS00:Received Unit: id:00 state:DOWNLOAD error:NO_ERROR project:13001 run:12 clone:3 gen:18 core:0x17 unit:0x0000002d538b3db753285336e3120e6d
20:11:25:WU00:FS00:Starting
20:11:25:WU00:FS00:Running FahCore: "C:\Program Files (x86)\FAHClient/FAHCoreWrapper.exe" C:/Users/bgoner/AppData/Roaming/FAHClient/cores/web.stanford.edu/~pande/Win32/AMD64/ATI/R600/Core_17.fah/FahCore_17.exe -dir 00 -suffix 01 -version 704 -lifeline 1764 -checkpoint 15 -gpu 1 -gpu-vendor ati
20:11:25:WU00:FS00:Started FahCore on PID 3572
20:11:25:WU00:FS00:Core PID:3584
20:11:25:WU00:FS00:FahCore 0x17 started
20:11:25:WU00:FS00:0x17:*********************** Log Started 2014-05-19T20:11:25Z ***********************
20:11:25:WU00:FS00:0x17:Project: 13001 (Run 12, Clone 3, Gen 18)
20:11:25:WU00:FS00:0x17:Unit: 0x0000002d538b3db753285336e3120e6d
20:11:25:WU00:FS00:0x17:CPU: 0x00000000000000000000000000000000
20:11:25:WU00:FS00:0x17:Machine: 0
20:11:25:WU00:FS00:0x17:Reading tar file state.xml
20:11:26:WU00:FS00:0x17:Reading tar file system.xml
20:11:27:WU00:FS00:0x17:Reading tar file integrator.xml
20:11:27:WU00:FS00:0x17:Reading tar file core.xml
20:11:27:WU00:FS00:0x17:Digital signatures verified
20:11:27:WU00:FS00:0x17:Folding@home GPU core17
20:11:27:WU00:FS00:0x17:Version 0.0.52
20:11:28:Saving configuration to config.xml
20:11:28:<config>
20:11:28:  <!-- Network -->
20:11:28:  <proxy v=':8080'/>
20:11:28:
20:11:28:  <!-- Slot Control -->
20:11:28:  <power v='full'/>
20:11:28:
20:11:28:  <!-- User Information -->
20:11:28:  <passkey v='********************************'/>
20:11:28:  <team v='224497'/>
20:11:28:  <user v='senuketo'/>
20:11:28:
20:11:28:  <!-- Folding Slots -->
20:11:28:  <slot id='1' type='GPU'/>
20:11:28:  <slot id='0' type='GPU'/>
20:11:28:</config>
20:13:54:WU01:FS01:0x17:Completed 125000 out of 5000000 steps (2%)
20:13:54:WU01:FS01:0x17:Temperature control disabled. Requirements: single Nvidia GPU, tmax must be < 110 and twait >= 900
20:14:44:WU00:FS00:0x17:Completed 0 out of 5000000 steps (0%)
20:14:44:WU00:FS00:0x17:Temperature control disabled. Requirements: single Nvidia GPU, tmax must be < 110 and twait >= 900
20:18:37:WU01:FS01:0x17:Completed 150000 out of 5000000 steps (3%)
20:27:33:WU01:FS01:0x17:Completed 200000 out of 5000000 steps (4%)
20:36:30:WU01:FS01:0x17:Completed 250000 out of 5000000 steps (5%)
20:45:44:WU01:FS01:0x17:Completed 300000 out of 5000000 steps (6%)
20:54:40:WU01:FS01:0x17:Completed 350000 out of 5000000 steps (7%)
21:03:56:WU01:FS01:0x17:Completed 400000 out of 5000000 steps (8%)
21:12:54:WU01:FS01:0x17:Completed 450000 out of 5000000 steps (9%)
21:21:51:WU01:FS01:0x17:Completed 500000 out of 5000000 steps (10%)
21:31:04:WU01:FS01:0x17:Completed 550000 out of 5000000 steps (11%)
21:40:00:WU01:FS01:0x17:Completed 600000 out of 5000000 steps (12%)
21:49:14:WU01:FS01:0x17:Completed 650000 out of 5000000 steps (13%)
21:58:10:WU01:FS01:0x17:Completed 700000 out of 5000000 steps (14%)
22:07:06:WU01:FS01:0x17:Completed 750000 out of 5000000 steps (15%)
22:16:20:WU01:FS01:0x17:Completed 800000 out of 5000000 steps (16%)
22:25:17:WU01:FS01:0x17:Completed 850000 out of 5000000 steps (17%)
22:34:31:WU01:FS01:0x17:Completed 900000 out of 5000000 steps (18%)
22:43:28:WU01:FS01:0x17:Completed 950000 out of 5000000 steps (19%)
22:52:25:WU01:FS01:0x17:Completed 1000000 out of 5000000 steps (20%)
23:01:38:WU01:FS01:0x17:Completed 1050000 out of 5000000 steps (21%)
23:10:35:WU01:FS01:0x17:Completed 1100000 out of 5000000 steps (22%)
23:19:48:WU01:FS01:0x17:Completed 1150000 out of 5000000 steps (23%)
23:28:45:WU01:FS01:0x17:Completed 1200000 out of 5000000 steps (24%)
23:37:41:WU01:FS01:0x17:Completed 1250000 out of 5000000 steps (25%)
23:46:55:WU01:FS01:0x17:Completed 1300000 out of 5000000 steps (26%)
23:55:52:WU01:FS01:0x17:Completed 1350000 out of 5000000 steps (27%)
00:05:06:WU01:FS01:0x17:Completed 1400000 out of 5000000 steps (28%)
00:14:03:WU01:FS01:0x17:Completed 1450000 out of 5000000 steps (29%)
00:23:00:WU01:FS01:0x17:Completed 1500000 out of 5000000 steps (30%)
00:32:13:WU01:FS01:0x17:Completed 1550000 out of 5000000 steps (31%)
00:41:09:WU01:FS01:0x17:Completed 1600000 out of 5000000 steps (32%)
00:50:23:WU01:FS01:0x17:Completed 1650000 out of 5000000 steps (33%)
00:59:19:WU01:FS01:0x17:Completed 1700000 out of 5000000 steps (34%)
01:08:16:WU01:FS01:0x17:Completed 1750000 out of 5000000 steps (35%)
01:17:30:WU01:FS01:0x17:Completed 1800000 out of 5000000 steps (36%)
01:26:27:WU01:FS01:0x17:Completed 1850000 out of 5000000 steps (37%)
01:35:42:WU01:FS01:0x17:Completed 1900000 out of 5000000 steps (38%)
01:44:39:WU01:FS01:0x17:Completed 1950000 out of 5000000 steps (39%)
01:53:36:WU01:FS01:0x17:Completed 2000000 out of 5000000 steps (40%)
02:02:50:WU01:FS01:0x17:Completed 2050000 out of 5000000 steps (41%)
******************************* Date: 2014-05-20 *******************************
02:11:46:WU01:FS01:0x17:Completed 2100000 out of 5000000 steps (42%)
02:21:00:WU01:FS01:0x17:Completed 2150000 out of 5000000 steps (43%)
02:29:56:WU01:FS01:0x17:Completed 2200000 out of 5000000 steps (44%)
02:38:53:WU01:FS01:0x17:Completed 2250000 out of 5000000 steps (45%)
02:48:07:WU01:FS01:0x17:Completed 2300000 out of 5000000 steps (46%)
02:57:04:WU01:FS01:0x17:Completed 2350000 out of 5000000 steps (47%)
03:06:21:WU01:FS01:0x17:Completed 2400000 out of 5000000 steps (48%)
03:15:18:WU01:FS01:0x17:Completed 2450000 out of 5000000 steps (49%)
03:24:15:WU01:FS01:0x17:Completed 2500000 out of 5000000 steps (50%)
03:33:29:WU01:FS01:0x17:Completed 2550000 out of 5000000 steps (51%)
03:42:26:WU01:FS01:0x17:Completed 2600000 out of 5000000 steps (52%)
03:51:39:WU01:FS01:0x17:Completed 2650000 out of 5000000 steps (53%)
04:00:36:WU01:FS01:0x17:Completed 2700000 out of 5000000 steps (54%)
04:09:32:WU01:FS01:0x17:Completed 2750000 out of 5000000 steps (55%)
04:18:47:WU01:FS01:0x17:Completed 2800000 out of 5000000 steps (56%)
04:27:44:WU01:FS01:0x17:Completed 2850000 out of 5000000 steps (57%)
04:36:58:WU01:FS01:0x17:Completed 2900000 out of 5000000 steps (58%)
04:45:55:WU01:FS01:0x17:Completed 2950000 out of 5000000 steps (59%)
04:54:52:WU01:FS01:0x17:Completed 3000000 out of 5000000 steps (60%)
05:04:07:WU01:FS01:0x17:Completed 3050000 out of 5000000 steps (61%)
05:13:03:WU01:FS01:0x17:Completed 3100000 out of 5000000 steps (62%)
05:22:16:WU01:FS01:0x17:Completed 3150000 out of 5000000 steps (63%)
05:31:13:WU01:FS01:0x17:Completed 3200000 out of 5000000 steps (64%)
05:40:09:WU01:FS01:0x17:Completed 3250000 out of 5000000 steps (65%)
05:49:23:WU01:FS01:0x17:Completed 3300000 out of 5000000 steps (66%)
05:58:20:WU01:FS01:0x17:Completed 3350000 out of 5000000 steps (67%)
06:07:34:WU01:FS01:0x17:Completed 3400000 out of 5000000 steps (68%)
06:16:30:WU01:FS01:0x17:Completed 3450000 out of 5000000 steps (69%)
06:25:28:WU01:FS01:0x17:Completed 3500000 out of 5000000 steps (70%)
06:34:41:WU01:FS01:0x17:Completed 3550000 out of 5000000 steps (71%)
06:43:38:WU01:FS01:0x17:Completed 3600000 out of 5000000 steps (72%)
06:52:52:WU01:FS01:0x17:Completed 3650000 out of 5000000 steps (73%)
07:01:48:WU01:FS01:0x17:Completed 3700000 out of 5000000 steps (74%)
07:10:45:WU01:FS01:0x17:Completed 3750000 out of 5000000 steps (75%)
07:19:59:WU01:FS01:0x17:Completed 3800000 out of 5000000 steps (76%)
07:28:56:WU01:FS01:0x17:Completed 3850000 out of 5000000 steps (77%)
07:38:10:WU01:FS01:0x17:Completed 3900000 out of 5000000 steps (78%)
07:47:07:WU01:FS01:0x17:Completed 3950000 out of 5000000 steps (79%)
07:56:04:WU01:FS01:0x17:Completed 4000000 out of 5000000 steps (80%)
08:05:18:WU01:FS01:0x17:Completed 4050000 out of 5000000 steps (81%)
******************************* Date: 2014-05-20 *******************************
08:14:14:WU01:FS01:0x17:Completed 4100000 out of 5000000 steps (82%)
08:23:28:WU01:FS01:0x17:Completed 4150000 out of 5000000 steps (83%)
08:32:24:WU01:FS01:0x17:Completed 4200000 out of 5000000 steps (84%)
08:41:21:WU01:FS01:0x17:Completed 4250000 out of 5000000 steps (85%)
08:50:35:WU01:FS01:0x17:Completed 4300000 out of 5000000 steps (86%)
08:59:32:WU01:FS01:0x17:Completed 4350000 out of 5000000 steps (87%)
09:08:49:WU01:FS01:0x17:Completed 4400000 out of 5000000 steps (88%)
09:17:51:WU01:FS01:0x17:Completed 4450000 out of 5000000 steps (89%)
09:26:50:WU01:FS01:0x17:Completed 4500000 out of 5000000 steps (90%)
09:36:07:WU01:FS01:0x17:Completed 4550000 out of 5000000 steps (91%)
09:45:06:WU01:FS01:0x17:Completed 4600000 out of 5000000 steps (92%)

Posted: **Tue May 20, 2014 9:43 am**

When showing the log, it would be useful to show the system and config portions (click refresh then scroll to the top).

Check your Windows event logs for a video driver failure. There is a common failure mode when the video driver resets where the folding consoles show progress and stops then holds at 99% but the log does not show any progress and the %GPU usage stays at 0%. If you pause the offending slot and restart it will restart at the last known checkpoint.

Posted: **Tue May 20, 2014 10:09 am**

hey,
thanks. Edited the log.
will try to check for driver failures.

cheers

Posted: **Tue May 20, 2014 2:36 pm**

Searched the Event Viewer for potential display driver issues and these two seem likely.
What are your thoughts?

Posted: **Tue May 20, 2014 3:36 pm**

When you get a Driver reset ("amdkmdap stopped responding and has successfully recovered") it's an error of the same magnitude as a BSOD except it's in the GPU rather than the CPU. The word "recover" means that the GPU is ready to try again to refresh the data on the screen, but it does not mean that FAH is still folding. This commonly leads to the observation that nothing is happening with that GPU.

I would try pausing that GPU and resuming work. Does that lead to another reset or does the WU start folding successfully?

Just like BSODs, there are many possible causes for GPU Resets with few clues to lead you in the right direction, but you really do need to figure out how to avoid them.

Posted: **Tue May 20, 2014 6:57 pm**

My case is the exact same as P5-133XL described it:

There is a common failure mode when the video driver resets where the folding consoles show progress and stops then holds at 99% but the log does not show any progress and the %GPU usage stays at 0%.

Pausing and resuming the bad GPU again triggered driver reset.
Here's the log from this event:

Code: Select all

17:39:41:WU02:FS01:0x17:Completed 2200000 out of 5000000 steps (44%)
17:48:37:WU02:FS01:0x17:Completed 2250000 out of 5000000 steps (45%)
17:51:53:FS00:Paused
17:51:53:FS00:Shutting core down
17:51:53:WU00:FS00:0x17:WARNING:Console control signal 1 on PID 3584
17:51:53:WU00:FS00:0x17:Exiting, please wait. . .
17:52:48:Saving configuration to config.xml
17:52:48:<config>
17:52:48:  <!-- Network -->
17:52:48:  <proxy v=':8080'/>
17:52:48:
17:52:48:  <!-- Slot Control -->
17:52:48:  <power v='full'/>
17:52:48:
17:52:48:  <!-- User Information -->
17:52:48:  <passkey v='********************************'/>
17:52:48:  <team v='224497'/>
17:52:48:  <user v='senuketo'/>
17:52:48:
17:52:48:  <!-- Folding Slots -->
17:52:48:  <slot id='1' type='GPU'/>
17:52:48:  <slot id='0' type='GPU'>
17:52:48:    <paused v='true'/>
17:52:48:  </slot>
17:52:48:</config>
17:52:54:WARNING:FS00:Killing WU00
17:52:54:WU00:FS00:FahCore returned: INTERRUPTED (102 = 0x66)
17:53:12:FS00:Unpaused
17:53:13:WU00:FS00:Starting
17:53:13:WU00:FS00:Running FahCore: "C:\Program Files (x86)\FAHClient/FAHCoreWrapper.exe" C:/Users/bgoner/AppData/Roaming/FAHClient/cores/web.stanford.edu/~pande/Win32/AMD64/ATI/R600/Core_17.fah/FahCore_17.exe -dir 00 -suffix 01 -version 704 -lifeline 1764 -checkpoint 15 -gpu 1 -gpu-vendor ati
17:53:13:WU00:FS00:Started FahCore on PID 2440
17:53:13:WU00:FS00:Core PID:1652
17:53:13:WU00:FS00:FahCore 0x17 started
17:53:13:WU00:FS00:0x17:*********************** Log Started 2014-05-20T17:53:13Z ***********************
17:53:13:WU00:FS00:0x17:Project: 13001 (Run 12, Clone 3, Gen 18)
17:53:13:WU00:FS00:0x17:Unit: 0x0000002d538b3db753285336e3120e6d
17:53:13:WU00:FS00:0x17:CPU: 0x00000000000000000000000000000000
17:53:13:WU00:FS00:0x17:Machine: 0
17:53:13:WU00:FS00:0x17:Digital signatures verified
17:53:13:WU00:FS00:0x17:Folding@home GPU core17
17:53:13:WU00:FS00:0x17:Version 0.0.52
17:53:49:Saving configuration to config.xml
17:53:49:<config>
17:53:49:  <!-- Network -->
17:53:49:  <proxy v=':8080'/>
17:53:49:
17:53:49:  <!-- Slot Control -->
17:53:49:  <power v='full'/>
17:53:49:
17:53:49:  <!-- User Information -->
17:53:49:  <passkey v='********************************'/>
17:53:49:  <team v='224497'/>
17:53:49:  <user v='senuketo'/>
17:53:49:
17:53:49:  <!-- Folding Slots -->
17:53:49:  <slot id='1' type='GPU'/>
17:53:49:  <slot id='0' type='GPU'/>
17:53:49:</config>
17:56:20:WU00:FS00:0x17:Completed 0 out of 5000000 steps (0%)
17:56:20:WU00:FS00:0x17:Temperature control disabled. Requirements: single Nvidia GPU, tmax must be < 110 and twait >= 900
17:57:45:WU02:FS01:0x17:Completed 2300000 out of 5000000 steps (46%)
18:06:44:WU02:FS01:0x17:Completed 2350000 out of 5000000 steps (47%)
18:15:57:WU02:FS01:0x17:Completed 2400000 out of 5000000 steps (48%)
18:24:54:WU02:FS01:0x17:Completed 2450000 out of 5000000 steps (49%)
18:33:49:WU02:FS01:0x17:Completed 2500000 out of 5000000 steps (50%)
18:43:02:WU02:FS01:0x17:Completed 2550000 out of 5000000 steps (51%)

could it be from different GPUs on a single PC (although 7970 and 280x are almost the same)
or could it be from the 3.0 USB EXTENDER I'm using at the x1 slot?
or could it be from trying to fold through the x1 pci slot?

Posted: **Tue May 20, 2014 7:28 pm**

x1 slots are known to degrade GPU performance. I had a GTX 760 in a x16 slot, which was only wired for x1 (server motherboard). It ran 10% under the PPD of all the other numbers posted here in the forum. I eventually upgraded, but the system had issues.

Anything that is a bottleneck can cause issues, especially non-standard hardware like extenders. Unfortunately, I have no way to test for that other than to move the GPU in to a full x16 slot and test it that way.

Posted: **Tue May 20, 2014 7:35 pm**

Can't say the cause but I know whatever it is has to be fixed before you will be able to successfully fold on the GPU.

driver resets are non-specific as to cause. Common causes: Bad or dying video card; OC'ing including fiddling with voltages; Excessive temperatures; Insufficient power for a PS or an individual rail; Playing games, watching YouTube, of some other GPU related activity at the same time as folding.

I would not rule out the 1x slot or the usb extender as causes but those are not common problems.

Folding Forum

2 GPUs problem

2 GPUs problem

Re: 2 GPUs problem

Re: 2 GPUs problem

Re: 2 GPUs problem

Re: 2 GPUs problem

Re: 2 GPUs problem

Re: 2 GPUs problem

Re: 2 GPUs problem