Topic: [ANN][TAG] TAGMining.Com is now the official pool of Tagcoin! - page 8. (Read 45653 times)

Edit

Sorry, wrong thread.

First, try engine and memory clock of 0 and see how that works. Then, try intensity 14 and work up. If these don't help, I suggest AMD 11 or 12x drivers.

Hi,

I just bought quite many Sapphire HD 7950 With Boost, GPU's and I'm having a lot of trouble having them being stable.
My system is the following:

MB: Asus P8z68-v Gen3
8GB RAM
Intel i5-3570k
2x mentioned GPU's
PSU: 1050w Seasonic Gold

So I'm using stock voltages and clock speeds for both of the GPU's just to try to keep it stable at first. The problem is that after 5-30 minutes my monitor freezes and after a while system reboots. I'm using Windows 7 Professional, AMD Catalyst 13.11 Beta 4 drivers, latest AMD SDK and CGminer 3.7.2. I know it can't be the PSU since it should have a fairly enough power for both of these cards.

Some parameters for CGminer: -I 20 --thread-concurrency 24000 --shaders (or similar) 1792 --gpu-memclock 1250 --gpu-core 925 -g 1 (Also export max_alloc and sync is there)

I'm running out of ideas that what could go wrong? GPU temperatures are around 60-70.

Earlier I had 1x 5870 and 1x 7950 configured on the same motherboard, heavily overclocked and it was working perfectly without problems. And I noticed that the more I overclock these new cards the shorter it takes for monitor to freeze. I have also tried with 3x of these new GPU's and it's the same problem so I moved to 2x which both are on pcie 16x.

So basically, could this be a driver issue, should I lower the intensity (Everyone else with this card seems to be happy with 20), temperatures can't be too high, should I try with linux...Any advice would be really appreciated. Thanks all!
 

(I posted this earlier to newbie section but no responses and I know that here we have some great experts )

Nice! That fixed it!

thanks again haha 

Make sure this is run before sgminer:

export DISPLAY=:0
export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1

Also, make sure lookup gap is set to 2. If that doesn't fix it, I dunno off the top of my head. Could be a driver thing.

Sapphire Vapor-X 7950 does not like Ubuntu or something, not sure what this error means when trying to run sgminer with any TC higher then ~15000


[23:51:46] Started sgminer 4.0.0
[23:51:46] Started sgminer 4.0.0
[23:51:46] Maximum buffer memory device 0 supports says 1073741824
[23:51:46] Your scrypt settings come to 1572864000
[23:51:46] Error -61: clCreateBuffer (padbuffer8), decrease TC or increase LG
[23:51:46] Failed to init GPU thread 0, disabling device 0
[23:51:46] Restarting the GPU from the menu will not fix this.
[23:51:46] Try restarting sgminer.

Imagine when I get all 4 online. I switched to the other pool for now (the other coin). Might give me ROI in 2 days or something, depending on exchange rate. LOL. Found a block too, so I know the rig is doing it's job.

No HW errors, but the Reject rate is bothering me.

ehalves, mining doesn't really rely on system ram, but the OS does. You should be fine with 2gb for windows or linux if it's just a dedicated rig.

dabs, looks great man, really sick hashrates.

Some pictures:

Dabs Rig with 2 GPUs plugged directly to motherboard and cooling solution.


Power Usage on Watt Meter


Stats display on sgminer


Will experiment with the powertune setting, maybe I can make it go faster a little bit more.

What are the RAM limitations for running 4-5 gpu's on Ubuntu vs Windows?

Have 4 gig on Windows which I think should be plenty, but only 2 on the Linux machine which is using the ASrock H81.

Thanks for the tips!

BAMT does it automagically, for ubuntu if it doesn't, I believe this command will help:

sudo aticonfig --adapter=all --initial

That forces the drivers to recheck all slots for GPUs

Here's what I plan to do. I'll plug in one card at a time. Power on. Run it for a few minutes. Restart it once or twice to make sure it runs as normal. Then Power off and plug the next card. Until I get all 4 or 5 cards working.

Or you could just go plug all of them at once, then see if BAMT or Ubuntu will work. I'm guessing they should.

Now I just have the hurdle of having the mobo's recognize all the cards once I get my all the risers I need haha

Yeah, I noticed that part about undervolting. I might have to stick in Windows temporarily just to flash my GPU bios, in order to undervolt it, because sgminer can't do it; my two GPUs are running 58 C to 64 C, but only because they're in my office (which has cooling). When I get my risers, I'll plug in all 4 and see how the temps are.

No hardware errors, but it rejects or invalids about 1% shares.

Congrats!

SOLVED!!!

Thanks for your help guys, I finally figured it out.

Decided to throw up the white flag with BAMT and went back to my clean install of Ubuntu.

From there I scoured google for a decent guide and found one that was posted a few days ago specifically for sgminer. Followed it step by step making sure I didn't miss anything and bam, 280x going at a stable 750 kh/s 

You'll spend over an hour compiling things, and that's if your machine is fast and you know what you're doing  (or you follow tutorials), and there's no guarantee it'll work with the drivers you compile. I've done it 4 times, and never liked the results.

BAMT is the quickest solution, works out of the box. If you follow what I suggest and ignore the BAMT forum instructions, you will be mining in 2 minutes. Basically:

* Burn BAMT onto a USB stick
* Boot it up
* Do nothing but wait

Within about a minute, your machine should start mining by itself with absolutely no other changes. This shows BAMT works with your cards. If it doesn't work, then it's not compatible with your setup. Try another version of BAMT (1.1, 1.2, 1.3). One should work. If it doesn't work by doing this, something is wrong, either a strange hardware compatibility issue or something. BAMT works 99.7% of the time on all hardware.

Pro tip, if this machine is just mining, disable everything in BIOS the machine won't use. Kill SATA, Serial Ports, etc. You need USB and LAN obviously.

Once you know it does work, the only thing that's left is to put your pool information in, customize GPU settings, etc. cgminer.conf holds those. There's more customization which can be done, but this is just to get you up and running.

It's also not a guarantee, but typically you'll see 5-20kh faster results per card with linux-based setups because there's no-to-lower overhead on the graphics side. Windows setups have easier undervolting.

I love, love, love linux... but I hate linux.  I'd much rather install windows on a computer here and there to mine with.  You don't even need to activate it.  As long as it starts up, it will mine.  Now, if you're running a farm... BAMT or linux all the way.  If you're really good, install linux on a live, persistent flash drive, and then make an image of the drive and use it on the other computers.  Or... use BAMT lol.

But I'm rolling deep with windows miners right now, so to each their own.

Peeps:

Also... if I've done any business with anyone here, can you please update my trust rating with our deals?  I will do the same in return.

Thanks!

-Fuse

Anyone think it would be easier to start mining on a clean install of ubuntu? Started with that but couldn't figure out how to compile anything or run anything or whatever you do in linux.

Gonna have to start scrounging the internet for someone who doesn't skip a step....cause I feel like every guide I have looked at is either missing something or I am just a completely inadequate to be trying to mine on linux lol.

If you want to try it manually and see what errors exist, or why it fails to load, go to the command prompt and do this:

cd /opt/miners/cgminer
./cgminer --conf /etc/bamt/cgminer.conf

That will let you see what (if anything) errors/fails upon startup. Provided you're loading cgminer. I'd imagine it's about the same for sgminer.