Does CPU affect how many GPUs you can run?

MrBilling

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Quote from: philips on May 16, 2013, 09:48:24 PM

Hm, you can try to SSH to 192.168.1.107 and from there again SSH to 192.168.1.109.

So two instances of putty (or whatever you use), one to 192.168.1.107 and one to 192.168.1.109 (via 192.168.1.107).

Port 22 is the default port for SSH connection from what I remember.
Try to edit /etc/ssh/sshd_config and assign a different port maybe?

Thanks once agin Phillips.

So I changed the port in sshd_config and I also changed the port in ssh_config. I think you were confused as to my intentions. I wasnt trying to change the ports to be able to view it locally I was changing the port so that I could foreward it in my router settings so that I can SSH into it from wherever I am using my iPad.

I know I could just SSH into one of the rigs and use mgpumon. But I like using gpumon better. So now I can log in to both rigs and use gpumon.

philips

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Quote from: tom_o on May 17, 2013, 03:33:20 AM

Does teamviewer work on linux? That's the way I remotely monitor my rig through awkward and restrictive NATing (uni halls internet)

Yes, there is a version for Linux. In fact it runs on pretty much everything (iPhone too

)

tom_o

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Quote from: ewitte on May 17, 2013, 06:56:56 AM

BTW I've seen people running multiple FPGA off a Raspberry Pi which is ARM so really there isn't any limitation for CPU. On that 1155 Celeron (G550 I believe) it runs between 1-3 cpu utilization.

Only thing with the Rpi is that USB bandwidth can be an issue and it eats into CPU time just to organise the USB stack iirc. This was an issue with soundcards at least.

As for a real cpu - anything should be ok. I run a core i3 clocked down to 1.33GHz and with only one core turned on, my PSU switches itself off otherwise Tongue

ewitte

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BTW I've seen people running multiple FPGA off a Raspberry Pi which is ARM so really there isn't any limitation for CPU. On that 1155 Celeron (G550 I believe) it runs between 1-3 cpu utilization.

tom_o

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Does teamviewer work on linux? That's the way I remotely monitor my rig through awkward and restrictive NATing (uni halls internet)

philips

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Hm, you can try to SSH to 192.168.1.107 and from there again SSH to 192.168.1.109.

So two instances of putty (or whatever you use), one to 192.168.1.107 and one to 192.168.1.109 (via 192.168.1.107).

Port 22 is the default port for SSH connection from what I remember.
Try to edit /etc/ssh/sshd_config and assign a different port maybe?

MrBilling

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Quote from: philips on May 15, 2013, 12:28:04 PM

I just noted the current settings (used while in auto) and entered them as static.

I monitor the rigs through the mgpumon web interface, so something like this : http://wa.gigamining.com:81/mgpumon/index.html

while monitor and control cgminer by ssh-ing to them (each rig) and using screen -r cgminer command.
If needed, out of cgminer with Ctrl+A+D and use coldreboot in the same terminal.

If you use gpumon you can quit with q and enter coldreboot in terminal.

Thanks

Do you know how I can change the port that I SSH into on one of my BAMT rigs? As in, right now I got one at 192.168.1.107 and the other at 192.168.1.109. I have set in my router to forward the 192.168.1.107 one on port 22. This allows me to view it from outside of my local network.

But I cant forward both IPs to the same port. So, can I change the port on one of the BAMT rigs so that I can forward it?

I know I can use mgpumon but I like doing it this way.

Thanks again!

philips

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I just noted the current settings (used while in auto) and entered them as static.

I monitor the rigs through the mgpumon web interface, so something like this : http://wa.gigamining.com:81/mgpumon/index.html

while monitor and control cgminer by ssh-ing to them (each rig) and using screen -r cgminer command.
If needed, out of cgminer with Ctrl+A+D and use coldreboot in the same terminal.

If you use gpumon you can quit with q and enter coldreboot in terminal.

MrBilling

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Thanks

When I treid to assign an IP I couldnt get it to mine. It said it was mining but it wasnt showing any KH/s. I know this is because it has no internet connection because I forgot to hook up the ethernet cable once or twice and thats what it did.

I changed the IP back to auto and it started working fine.

Does this mean I have to change some things in my router?

And do you reboot from mgpumon? I know gpumon has some things you can do that it shows you when you press ?. But I didnt see any options to reboot or coldreboot or anything like that.

Or is the coldreboot a command you enter through SSH?

philips

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Quote from: MrBilling on May 14, 2013, 05:15:49 PM

Are you able to boot into safemode through the terminal?

While in BAMT (stop the mining) open the file manager and navigate to /live/image/syslinux/ where you gonna find a file named live.cfg.
Open it with the leafpad editor and add the argument I highlighted in red to the first append line.

Quote

label live
menu label Boot the BAMT
kernel /live/vmlinuz
append initrd=/live/initrd.img boot=live config persistent splash vga=0x317 maxcpus=1 hostname=bamt-miner quiet vga=normal

label livefailsafe
menu label Boot the BAMT (failsafe)
kernel /live/vmlinuz
append initrd=/live/initrd.img boot=live config persistent splash vga=0x317 hostname=bamt-miner noapic noapm nodma nomce nolapic nomodeset nosmp vga=normal
...............................................................

You can now boot both in safe or normal mode.

Quote

can youpoint me to something that tells me how to assign fixed IP addresses tp my BAMT rigs.

In the lower right corner right click the Network icon and choose Edit Connection. (You can also choose Connection information to find the current IP)

On the first tab (Wired) choose your connection (something like Auto eth0) and click on edit.
Go to IPv4 Settings and choose the Manual method and enter your desired settings.

MrBilling

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Are you able to boot into safemode through the terminal?

can youpoint me to something that tells me how to assign fixed IP addresses tp my BAMT rigs.

philips

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I can say that BAMT (both this 7XXX version or the original one) has sometimes the tendency to crash/hang/get stuck if I access it locally.
Left alone BAMT can run for days or more, but if say, I move the mouse and wake the monitor, often the cursor get stuck and mining stops. I can only reboot.

I have fixed IP addresses assigned to each BAMT and access them only through SSH and monitor them through mgpumon (web interface).
If a reboot is needed I use coldreboot in terminal, I rarely enter in the room where the rigs are located.

MrBilling

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Hey Phillips. Do you know if BAMT runs better or mor3 stable if it is ran headless?

Like if I turn the rig on with the screen hooked up long enough to get the local IP address from it then disconnect the monitor and run it from SSH after that.

Do you think this would make it run more stable?

Thanks

MrBilling

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Well I hooked it up like you suggested. I got 3 cards runnning off of one 1200W PSU, and the other 2 running off of another 1200W PSU. I have the 2riser cables molex's plugged into the same PSU as the mobo.

It will run for a little while then freeze. I have the clocks at stock. My other BAMT rig runs 24/7 with alot stronger OC and mining settings.

A little later today when I get some time I may try to install BAMT to another USB stick and try that.

philips

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Quote from: MrBilling on May 13, 2013, 10:57:25 AM

If you think 4 cards it too much for a 1200W maybe I should try 3 on one and 2 on the other.

Wierd though because my other rig runs strong with 4 cards on the same PSU.

Yes, try that.
Power the risers only from the main PSU (the one connected to the motherboard)

MrBilling

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If you think 4 cards it too much for a 1200W maybe I should try 3 on one and 2 on the other.

Wierd though because my other rig runs strong with 4 cards on the same PSU.

MrBilling

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Right now I have 4 cards running off of a 1200W Silverstone Gold, and the other card running off of a 1200W Cooler Master Gold.

I was gonna eventually move the single card over to a PC Power and Cooling 500W. But I wanted to run it like this at first so I knew I wasnt having power problems.

My Windows rigs run 4 cards off the same Silverstone 1200W. (Not the same same but same kind) All of these PSUs are single rail.

One of my windows rigs was freezing up until I lowered the clocks and now it doesnt do it anymore. Last night I lowered this 5 card BAMT rig down to almost stock clocks and it froze not even an hour after I went to bed.

When it freezes the fans are still on 100% you just cant wake the computer up and get the screen to come back on. And its not mining because its not showing up on the pool and not blowing hot air out of the cards.

philips

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Quote from: MrBilling on May 13, 2013, 02:09:06 AM

Ive got some tweaking to do.

Before with 4 cards I could get 600 KH/s. Now with those same settings BAMT freezes up after about an hour. I tried lowereing the clocks from 1100/1375 to 1050/1250 and it froze again.

Ive got it on 1000/1200 now. See if it helps. I also lowered the thread concurrency from 19000 to 16000.

Should running 5 cards be the same as running 4? Or is running 5 cards generally more unstable?

What PSU do you have?

Operatr

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www.DonateMedia.org

You can go very minimal for a mining processor. There is a $40 Sempron in mine.

GPUs are actually doing all the work, so the processor doesn't have to be much in the way of power, just enough to to run an operating system with. Processors don't much use in mining as their multi-purpose architecture makes them very inefficient at hashing. GPUs architecture is much more hash friendly. You don't need much RAM either, anything beyond 2Gb won't make your rig mine any faster, you could probably use less though for general system speed I would say 4gb max, as memory is pretty cheap anyway.

All that really limits how many GPUs you can run is how many PCIe slots you have available, and your power supply.

ewitte

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My celeron handles both BTC and LTC just as good as the 6 core Xeon.

MrBilling

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Ive got some tweaking to do.

Before with 4 cards I could get 600 KH/s. Now with those same settings BAMT freezes up after about an hour. I tried lowereing the clocks from 1100/1375 to 1050/1250 and it froze again.

Ive got it on 1000/1200 now. See if it helps. I also lowered the thread concurrency from 19000 to 16000.

Should running 5 cards be the same as running 4? Or is running 5 cards generally more unstable?

-ck

legendary

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Ruu \o/

When I first put my 4 7970s into my rig, Xorg would refuse to start with the gdm gnome login manager. If I started a bare bones Xorg as a regular user, it would start. So I left it mining like that.

MrBilling

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Quote from: philips on May 12, 2013, 09:09:34 PM

Quote from: MrBilling on May 12, 2013, 08:34:53 PM

If I try three cards directly into the board and 2 cards on the X1 on risers it wont boot. It will boot and show the BAMT loading screen but then it goes blank.

In this configuration try to boot BAMT in safe mode.

I have the same issue with 5 cards, in normal mode BAMT goes blank, while in safe mode it works just fine.
Never bothered to find out why, I just start it in safe mode.

OK So you are talking about failsafe right? Where it says boot the BAMT then below that it says boot the BAMT (failsafe).

So I moved the cards back to three directly on the board no risers and one on a X1 adapter. So 4 cards. Just to make sure it still works that way. It worked.

So I installed the 5th card into the other X1 slot with a X1 adapter. Tried to boot. No luck. So I tried to boot into safe mode (failsafe) and it still wouldn't work.

So as a last resort I shorted the presence pins on the 5th card. Tried to boot it. No luck. Tried to boot it into safe mode (failsafe) and IT WORKED!

So for the second time you saved my a** Phillips. Thank you so so so much.

I hope it always works like this booting into safe mode. So you have to boot into safe mode every time you boot your rig?

philips

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Quote from: MrBilling on May 12, 2013, 08:34:53 PM

If I try three cards directly into the board and 2 cards on the X1 on risers it wont boot. It will boot and show the BAMT loading screen but then it goes blank.

In this configuration try to boot BAMT in safe mode.

I have the same issue with 5 cards, in normal mode BAMT goes blank, while in safe mode it works just fine.
Never bothered to find out why, I just start it in safe mode.

MrBilling

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I just got done doing some more testing.

This board has 3 X16 and 2 X1.

If I plug 3 cards straight into the board (no risers) and one card into one of the X1 slots it will work perfectly. so this is 4 cards. If I try three cards directly into the board and 2 cards on the X1 on risers it wont boot. It will boot and show the BAMT loading screen but then it goes blank.

Another member told me that this board only has 22 lanes, they said 24 but after confirming the AMD 970 chipset only supports 22 lanes.

So I tried plugging 5 cards in all with 5 X1 risers. It would boot into BAMT but no matter what I do it will not show the card in the second X16 slot. I tried switching cards, switching risers cables, shorting the presence pins, nothing.

I see alot of people reccomend boards with the AMD 890FX chipset. Like the 890FXA-GD70 MSI board. The 890 chipset supports 38 lanes just like the newer 990 chipset does.

I might try ordering a 990 chipset board. Like the ASRock 990FX Extreme4, or MSI 990FXA-GD80.

philips

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When you say it doesn't boot you mean it just stands there at the boot screen?
Or it starts and stops half way?

Try to start BAMT in safe mode (choose at the boot screen) and if it starts look in the upper right corner, how many cards are listed?

Or, enter in terminal:

Code:

aticonfig --list-adapters

MrBilling

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I am using BAMT. Thats why I was saying the mobo is on the BAMT hardware compatability list as working with 5 GPUs.

I have tried every combo. Risers, both powered and non powered. I have tried using all X1 risers. It just wont boot with more than 4 GPUs.

SkyNet

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people have been reporting issues with more than 4 GPUs in Windows. Linux works fine.
Which OS are you running?

os2sam

legendary

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Think for yourself

Quote from: MrBilling on May 12, 2013, 03:27:48 PM

Not being able to run 5 GPUs.

I am using a mob on the BAMT compatibility list as working with 5 GPUs.

Plus I have read other people on here running 5 GPUs with it.

Its the ASRock 970 Extreme4.

I was just wondering if maybe the CPU had something to do with it.

I seriously doubt it. I'm using Windoze 7 32 bit, so I don't know anything about mob's or bamt's. Provide some details and maybe others would be able to help.
Good Luck,
Sam

MrBilling

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Not being able to run 5 GPUs.

I am using a mob on the BAMT compatibility list as working with 5 GPUs.

Plus I have read other people on here running 5 GPUs with it.

Its the ASRock 970 Extreme4.

I was just wondering if maybe the CPU had something to do with it.

os2sam

legendary

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Think for yourself

Quote from: MrBilling on May 12, 2013, 03:19:38 PM

I have been trying to get 5 to run with this CPU.

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103953

Its an Athlon II 270.

That's a much higher end CPU than most miners. My Athlon II 250 runs around 5%.

So what problem are you having?
Sam

MrBilling

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I have been trying to get 5 to run with this CPU.

http://www.newegg.com/Product/Product.aspx?Item=N82E16819103953

Its an Athlon II 270.

Topic: Does CPU affect how many GPUs you can run? (Read 4427 times)