I resolved my issues.
Here's current stats, last 12 hours running:
10:08:12:934 17e8 ETH - Total Speed: 176.063 Mh/s, Total Shares: 1815, Rejected: 0, Time: 12:21
10:08:12:934 17e8 ETH: GPU0 29.257 Mh/s, GPU1 28.244 Mh/s, GPU2 29.410 Mh/s, GPU3 29.783 Mh/s, GPU4 29.683 Mh/s, GPU5 29.687 Mh/s
10:08:12:934 17e8 DCR - Total Speed: 5281.872 Mh/s, Total Shares: 7011, Rejected: 106
10:08:12:934 17e8 DCR: GPU0 877.699 Mh/s, GPU1 847.312 Mh/s, GPU2 882.304 Mh/s, GPU3 893.480 Mh/s, GPU4 890.478 Mh/s, GPU5 890.599 Mh/s
What happened, how I did it:
First off, I switched mining pools to ethermine. 55ms ping. Nicehash has 100ms ping from my location.
This all but eliminated my rejected eth shares. I still mine Decred to nicehash and get rejected shares, but I don't care, will be switching to SIA soon.
Even so, GPU1 (Jukebox vdrop+.rom) was still being a bit of a pain, causing weird issues getting the temperature and fan speed (from all the cards) hanging OpenGL and rebooting:
21:00:20:311 15fc Cannot get Overdrive capabilities for adapter 0
21:00:20:326 15fc Cannot get Overdrive capabilities for adapter 6
21:00:20:326 15fc Cannot get Overdrive capabilities for adapter 12
21:00:20:326 15fc Cannot get Overdrive capabilities for adapter 18
21:00:20:326 15fc Cannot get Overdrive capabilities for adapter 24
21:00:20:326 15fc Cannot get Overdrive capabilities for adapter 30
21:00:20:358 15fc Cannot get Overdrive capabilities for adapter 0
21:00:20:358 15fc Cannot get Overdrive capabilities for adapter 6
21:00:20:358 15fc Cannot get Overdrive capabilities for adapter 12
21:00:20:358 15fc Cannot get Overdrive capabilities for adapter 18
21:00:20:358 15fc Cannot get Overdrive capabilities for adapter 24
21:00:20:373 15fc Cannot get Overdrive capabilities for adapter 30
21:00:20:373 15fc em hbt: 0, dm hbt: 0, fm hbt: 16,
21:00:20:373 15fc watchdog - thread 0, hb time 125
21:00:20:373 15fc watchdog - thread 1, hb time 16
21:00:20:373 15fc watchdog - thread 2, hb time 87860
21:00:20:373 15fc WATCHDOG: GPU 1 hangs in OpenCL call, exit
21:00:20:373 15fc watchdog - thread 3, hb time 87938
21:00:20:373 15fc WATCHDOG: GPU 1 hangs in OpenCL call, exit
21:00:20:373 15fc watchdog - thread 4, hb time 63
21:00:20:373 15fc watchdog - thread 5, hb time 141
21:00:20:373 15fc watchdog - thread 6, hb time 16
21:00:20:373 15fc watchdog - thread 7, hb time 94
21:00:20:373 15fc watchdog - thread 8, hb time 0
21:00:20:373 15fc watchdog - thread 9, hb time 94
21:00:20:373 15fc watchdog - thread 10, hb time 16
21:00:20:373 15fc watchdog - thread 11, hb time 94
21:00:20:373 15fc Rebooting
Even with vdrop+.rom, GPU1 had an overclocked memory speed which I lowered to stock
with WattTool-0.92.exe:
(FYI WattTool does not index the cards the same as Claymore, so GPU1 here is 0. If you really wanted to be sure you could make separate flashes with speeds at 2001 2002 2003 2004 2005 2006 MhZ or whatever for each card respectively. )
[General]
NoGUI=1
[Adapter]
Index=0
[I2C]
VoltageOffset=-16
[Memory]
Mode=Manual
P1_CLK=2000
P1_VID=1000
My new config.txt. Notice that I've increased temp/fan settings for GPU 1 (problem child) and GPU 4.
These cards are in between two other cards in my rig and tend to have higher temperatures than the rest.
-r 1
-retrydelay 5
-epool us1.ethermine.org:4444
-esm 1
-ewal 0xXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
-epsw x
-dpool stratum+tcp://decred.usa.nicehash.com:3354
-dwal 1xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-dpsw x
-tt 75,70,75,75,70,75
-fanmax 85,90,85,85,90,85
-fanmin 50,65,50,50,65,50
Hi,
I'm running a dual miner Claymore v9.3 rig with 6x Sapphire RX480 Nitro+OC 8GB cards (11260-01-20G) - Samsung Memory
Power supply is a Corsair ATX 1200i.
Modifications:
I'm using v4.rom from Jukebox on five of the cards (GPU0,2,3,4,5) and vdrop+.rom on one of them that has issues. (GPU1)
(These ROMS appear to overclock the memory and/or tighten the timings while reducing the CPU clock. vdrop+.rom is slightly more slower/conservative.)
I use WattTool-.92 to drop the voltage on all of them by 100mv
The Driver is 16.12.1 (patched to pass driver signature checks.)
Power from the wall is about 1050W and card temperatures are around 63C.
The rig is stable in that it does not hang or crash, Claymore is setup to reboot the machine on error, and it'll run all day like a champ:
ETH - Total Speed: 175.402 Mh/s, Total Shares: 1879, Rejected: 109, Time: 08:14
ETH: GPU0 29.727 Mh/s, GPU1 29.268 Mh/s, GPU2 29.792 Mh/s, GPU3 26.966 Mh/s, GPU4 29.807 Mh/s, GPU5 29.843 Mh/s
DCR - Total Speed: 5262.069 Mh/s, Total Shares: 4445, Rejected: 84
DCR: GPU0 891.816 Mh/s, GPU1 878.032 Mh/s, GPU2 893.747 Mh/s, GPU3 808.985 Mh/s, GPU4 894.204 Mh/s, GPU5 895.285 Mh/s
Here is my config:
-r 1
-retrydelay 5
-epool stratum+tcp://daggerhashimoto.usa.nicehash.com:3353
-ewal xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-epsw x
-esm 3
-allpools 1
-allcoins 1
-estale 0
-tt 75
-ttli 80
-fanmin 66
-fanmax 100
-dpool stratum+tcp://decred.usa.nicehash.com:3354
-dwal xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-ttdcr 75
Now here is my concern / question: Is such a high rejection rate
normal? That's about a %5 reject rate for ETH and %2 for DCR.