well..... I dont think it can support all 7.... I get a lot of PCI error messages.... but then again it could be my risers.
I am trying out seating and unseating the risers until i see some action. Gut feel... doesnt look promising.
I'm having problems getting the rig to post into smOS.
PCI errors mainly -- the error dump was scrolling too fast.
sorry man - it doesnt look straight forward this board for 7 cards.
my normal Asrock H81 Pro BTC can do 7 cards with splitter -- 7 x 370s - no issues and smOS & Linux sees all of the GPUs right away.
I have been Googling this board -- there might be something in BIOS to fiddle around. It seems use 4 x 16xPCI OR 3 x 1xPCI only.
I have not tried in Windows yet -- perhaps better results in Win 10.
---
I have put back the old 7 x 370 system - works fine on the first try. I recall, I spent hours getting this rig to work on 7 GPUs Windows 7 (works well on W10 out of box).
With Linux/smOS ... its a breeze.... see below. R7-370 x 7 with 3PCI-to USB splitter. Stock roms. Mining XMR at 730watts off the wall.
============ Starting Miner ===============
[20:19:34] Started sgminer 5.5.5-gm-nicehash-7
[20:19:34] config.json Desktop Documents Downloads Music Pictures Public Templates Videos using Jansson 2.7
Usage: atitweak [options]
atitweak: error: option -p: invalid integer value: 'null'
[20:19:38] Probing for an alive pool
[20:19:39] Startup GPU initialization... Using settings from pool cryptonight.hk.nicehash.com.
[20:19:39] Startup Pool No = 0
[20:19:39] Building binary cryptonightPitcairngw8l8.bin
[20:19:43] Initialising kernel cryptonight.cl with nfactor 10, n 1024
[20:19:43] Initialising kernel cryptonight.cl with nfactor 10, n 1024
[20:19:43] Initialising kernel cryptonight.cl with nfactor 10, n 1024
[20:19:43] Initialising kernel cryptonight.cl with nfactor 10, n 1024
[20:19:43] Initialising kernel cryptonight.cl with nfactor 10, n 1024
[20:19:43] Initialising kernel cryptonight.cl with nfactor 10, n 1024
[20:19:43] Initialising kernel cryptonight.cl with nfactor 10, n 1024
[20:19:50] Accepted 78becd04 Diff 139K/25K GPU 4 at cryptonight.hk.nicehash.com
[20:20:05] Accepted ba350d59 Diff 90.1K/25K GPU 3 at cryptonight.hk.nicehash.com
[20:20:06] Accepted 01159d15 Diff 60.4K/25K GPU 4 at cryptonight.hk.nicehash.com
[20:20:16] Accepted 0197aae8 Diff 41.2K/25K GPU 1 at cryptonight.hk.nicehash.com
[20:20:19] Accepted 011209d9 Diff 61.2K/25K GPU 4 at cryptonight.hk.nicehash.com
[20:20:27] Accepted d9ff5d5d Diff 77K/25K GPU 3 at cryptonight.hk.nicehash.com
[20:20:28] Accepted 13e24ba3 Diff 844K/25K GPU 6 at cryptonight.hk.nicehash.com
[20:20:29] Accepted 0176027e Diff 44.9K/25K GPU 2 at cryptonight.hk.nicehash.com
[20:20:37] Accepted 023c8b7a Diff 29.3K/25K GPU 2 at cryptonight.hk.nicehash.com
[20:21:17] Accepted 029722dc Diff 25.3K/25K GPU 1 at cryptonight.hk.nicehash.com
[20:21:17] Accepted 01b42c7d Diff 38.5K/25K GPU 2 at cryptonight.hk.nicehash.com
[20:21:19] Accepted 02598e78 Diff 27.9K/25K GPU 5 at cryptonight.hk.nicehash.com
(5s):3.121K (avg):2.646Kh/s | A:300001 R:0 HW:0 WU:5.999/m