Quote from: scryptr on September 14, 2016, 06:03:53 AM

Quote from: manotroll on September 14, 2016, 01:15:35 AM

Quote from: scryptr on September 12, 2016, 02:14:36 AM

Quote from: manotroll on September 11, 2016, 09:25:05 PM

Quote from: xxcsu on September 11, 2016, 05:15:16 PM

Quote from: xeridea on September 10, 2016, 01:24:15 AM

So I got an H81 BTC PRO board, currently 2x 1060s, 480, 2x 470. Can only use 4 GPUs at a time, Win7 sees all, but 1 will be inactive. Does the 6 gpu mod for Win7 work with Polaris cards? I can switch the 1060s with more 470s if I need to.

Also, is undervolting supported on Linux currently? This is a huge feature since I can save ~150w+ for the rig going from 1150mv to ~960-1000mv, and get better boost clocks. Is EthOS easy to use CDM?

I was not able to run 6 cards ( rx480 ) with windows 7 at all . 4 was running ok , 5 had some stability issue , 6 never worked ... Tried everything

Switched to win 10 , everything working fine . Installed WIN 10 ( disabled all updates , all automatic downloads ) , Intel Inf Utility , and rx 480 driver . With default settings all card hashing with 24.7 MH/s taking 1100 watts at wall ( 120 V ) , Then i "underclocked" my cards ( power limit , gpu speed - voltage , mem voltage ) , power usage at the wall become around 750Watts without pushing the default mem clock higher , with the same 24.7 Mh/s . Saved 350Watts per rig

around 700watts ( with my 2 setup in the same frame) Used wattman for underclocking .

Built a 12 cards ETH Miner , with 12 RX 480 / 2 asrock h97 anniversary Mobo , left a place in the middle for a additional micro itx board and 4 more cards

Still try to find a stable mem overclocking settings .

is not possible to use more than 7 vga on the same system?
using an adapter 1 to 3 ?

NOT ALL PCIE-SPLITTERS ARE THE SAME--

I have a 1-to-4 PCIe splitter that worked with a GTX 550ti and a GT 9800+, with a GTX 750ti on the motherboard. The 3 cards mined scrypt, but were not very fast. The GT9800+ got 14kh/s.

I was never able to get the splitter to work with any cards more modern; the GTX 550ti was compute 2.1 and the GT 9800+ was compute 1.0. An American made splitter will likely cost more than a motherboard. The model I bought cost $75, a new one today runs $45. I tried with AMD cards also. with no success. Asian 1-to-3 and 1-to-4 splitters run $35 to $50. Good luck. --scryptr

Thanks for the info
and I bought a motherboard with only 3 pci-e
I would then use this adapter to increase 9
when it connects of an error in the task manager?

THREE OR FOUR $35 MICRO-ATX MOTHERBOARDS--

You could run three or four cheap micro-ATX motherboards with three cards each and smaller power supplies. The splitters (also called multipliers) likely will not work. Mine does not, and you can't buy the cheap 1-to-4 card splitters anymore, I checked. Why bother with a huge $300 PSU? The splitters running on linked PSUs will likely get out of synchronization with the motherboard due to power fluctuation.

Little cheap motherboards cost the same as the splitters. Get one with an H81 chipset from a good brand. The whole idea of 6 to 8 cards to a rig is a waste, if you ask me. A 750 watt PSU can handle three RX 470 cards. Six RX 470 cards need a 1200-to-1600 watt PSU to run efficiently.

--scryptr

AM1 boards work really well for this and have really cheap CPU's to boot, also single channel memory controller so only need single stick which are cheaper as well than buying dual channel kits. I'm running a rig like this with 3 RX 470's on a 600W bronze PSU as the rest of the system uses almost no power. Especially if you use a flash dive for the OS. Asrock and Biostar boards let you use the IGPU as well as your add-on cards if you wanted to do some Cryptonote mining as well. the Athlon 5150 is the best in the bunch for this as the IGPU is clocked the same as the 5350.