Motherboard of choice for 6 or more GPU's

[tdslot]

Hello,

I have problem. Who can help me?

I have mining rig hardware:

• 4x XFX7950 FX-795A-TDJC
• ASUS SABERTOOTH 990FXR2.0 motherboard
• 8GB RAM
• CPU AMD FX8320 8x Cores 3.51 Ghz
• PSU Lepa 1600W

Software:

• Windows 7 SP1 x64
• AMD Radeo HD drivers 13.4 x64
• AMD SDK 2.7 x64
• CGMINER 3.3.1

My cgminer.conf

Code:

"api-allow" : "W:127.0.0.1",
"api-listen" : true,
"api-port" : "4028",
"expiry" : "120",
"failover-only" : true,
"hotplug" : "5",
"kernel-path" : "/usr/local/bin",
"log" : "5",
"no-submit-stale" : true,
"queue" : "1",
"rotate" : "10",
"scan-time" : "30",
"scrypt" : true,
"shares" : "0",
"auto-fan" : true,
"gpu-threads" : "1",
"gpu-dyninterval" : "7",
"gpu-engine" : "0-1025",
"gpu-fan" : "0-100",
"gpu-platform" : "0",
"gpu-memclock" : "1250",
"gpu-memdiff" : "0",
"gpu-powertune" : "0",
"gpu-vddc" : "1.087",
"intensity" : "20",
"temp-target" : "75",
"temp-overheat" : "88",
"temp-cutoff" : "95",
"temp-hysteresis" : "3",
"vectors" : "1",
"worksize" : "256",
"lookup-gap" : "2",
"shaders" : "2048",
"thread-concurrency" : "21712",
"no-pool-disable" : true

With this configuration 3x GPU cards running stable. But when I connect 4 card and run cgminer works very bad and turnoff motherboard. But PSU still running.

Who can help me with this problem? Maybe not impossible run rig with 4x GPU's? Maybe my configuration is wrong? Or I forget something to install?

Than you in advance,

TDS

[FullLife]

Hi
I have a MSI Z77-GD65 mobo with 5 x HD7870 XT Tahiti.  1 of these cards show error 43 (although all 5 are detected) and 4 are listed correctly in device manager. Is there any solution to use 5 or even 6 cards on this mobo ? I tried powered risers etc. , but only 13.1 drivers.
Do You think there is a reason to try with 12.6 or different ? Should I use win8 instead ?
Please help.

The info you seek has already been posted in this thread.  To use that many 7xxx series cards on one motherboard with Win 7, you need to used 12.6 drivers.  I've run (5) 7xxx cards on one board w/ Win 7 and (6) 7xxx cards on one board w/ Win 8 using those drivers.

[CartmanSPC]

I have decided to only use 4 GPUs (7970s) per rig.

Is there a preferred order of slots that should be used on the Z77A-GD65?

I currently have following slots populated all with 1x to 16x powered risers:



The first two GPUs (closest to the CPU) run much hotter than the other two

GPU1 73.0C
GPU2 75.0C
GPU3 65.0C
GPU4 62.0C

Video is plugged into GPU2.

[crescendo]

I using motherboard intel premium 245, it has reliable motherboard, it is longest life motherboard. Motherboard of 6 GPU have very comfortable and reliable.

[boozer]

Now that the MSI Z77a-GD65 GD55 are all gone... Is the Z87 the replacement?  Anyone got 7 GPU's running on it?

[1632008]

How about msi big bang marshal?
This one has up to 8 pcie x16 slots and is known to work for 8 cards. Current second-hand price is about 150$ in my local market.
But I also heard someone said he could only manage it to work with at most 6 cards.

[boozer]

How about msi big bang marshal?
This one has up to 8 pcie x16 slots and is known to work for 8 cards. Current second-hand price is about 150$ in my local market.
But I also heard someone said he could only manage it to work with at most 6 cards.

Yea, thats a good board... I'm just looking for something out of the new series that will be available in large quantities if needed and will have a longer warranty.

[Slander]

running more than 4 gpus on a single mobo is annoying. Lots of crashes and lockups. Trust me, you will spend way to much time trying to keep it stable.

At the end of the day you just want a stable rig that needs no babysitting.

[boozer]

running more than 4 gpus on a single mobo is annoying. Lots of crashes and lockups. Trust me, you will spend way to much time trying to keep it stable.

At the end of the day you just want a stable rig that needs no babysitting.

That may be your opinion, but I have many 7 card linux rigs that are stable for weeks at a time. I only have to intervene if there is a hardware failure of some sort (or to switch pools).

[Burninj]

Im' actually trying to run 7 cards on a MSI Z87-G45 GAMING with a Pentium g3220. So far I can't get more than 5 gpus to mine together under win 8, and I cant try linux because of shitty ethernet controller... Any idea about the 5 cards limit?

[Slander]

running more than 4 gpus on a single mobo is annoying. Lots of crashes and lockups. Trust me, you will spend way to much time trying to keep it stable.

At the end of the day you just want a stable rig that needs no babysitting.

That may be your opinion, but I have many 7 card linux rigs that are stable for weeks at a time. I only have to intervene if there is a hardware failure of some sort (or to switch pools).

Glad that works for you, I wish I had such luck.

A lot of people will be running windows, for them, running 4 cards per rig is the way to go. Another thing to keep in mind is that if you wake up and see your rig has been down all night for what ever reason its better to have 4 cards offline instead of 7. All your eggs in one basket and all that

[Steam20]

Gigabyte UD-7

[miner_x]

Has anyone succeeded to run 7 cards on Gigabyte Z87X-OC?
Do I need to do something to enable the PCI 1x on this board?

[boozer]

Has anyone succeeded to run 7 cards on Gigabyte Z87X-OC?
Do I need to do something to enable the PCI 1x on this board?

I havent used that board but did you try using a jumper on that 1x slot?

[tropicthunder]

Have 4 gpu 5770, 6750, 6850, 6950 what watts should get? 600w?

[miner_x]

Has anyone succeeded to run 7 cards on Gigabyte Z87X-OC?
Do I need to do something to enable the PCI 1x on this board?

I havent used that board but did you try using a jumper on that 1x slot?

I haven't tried it yet because I'm waiting for the pci risers
I hope to get them this week to try it out

Do you think I would need to use a jumper to activate that slot?

[boozer]

Do you think I would need to use a jumper to activate that slot?

If no card is detected in that slot, but your card(s) are detected in other slots, then trying a jumper is worth a shot.  Depends on the board, but only one way to find out

[AndrewWilliams]

Im' actually trying to run 7 cards on a MSI Z87-G45 GAMING with a Pentium g3220. So far I can't get more than 5 gpus to mine together under win 8, and I cant try linux because of shitty ethernet controller... Any idea about the 5 cards limit?

I have the same setup, MSI Z87-G45 Gaming and Pentium G3220.

I am confined to 2 GPUs right now until I can get my hands on some risers. Any suggestions for where to buy risers fast?

BTW, did you put thermal paste on your CPU, or did the heatsink already have it pre-applied?

[sameev29]

I'm not crazy knowledgeable but 6 is a lot of cards for one motherboard. Going 2 sets of 3 may be in your interest or even 2 sets of 4 if you want 8 total cards. Most PSUs just won't be able to pump out the power you need to power that many cards.

Cant he use 2 psu?Like 1 psu for 3 cards and other psu for other 3 cards.

[N[e]wBie]

all of these MOBOs save for the asrock seem to be intel, isn't AMD more power efficient, and cost effective? Which AMD boards support 4-6 GPUs?