|
Title: linux Ubuntu 5 7950 GPU rig low hash and freezing Post by: ndunks on February 15, 2014, 01:13:23 PM Hopefully someone may be able to assist..
Ive set up my new miner running cgminer, and I am hashing - but getting extremely low results and the computer keepd freezing. I have tried a variety of variations on the config file, but the current one is: "intensity" : "16", "vectors" : "1", "shaders" : "1792", "thread-concurrency" : "8960", "gpu-engine" : "925", "gpu-memclock" : "1350", "gpu-powertune" : "20", "gpu-threads" : "1", "worksize" : "256", "scrypt" : true, "kernel" : "scrypt", "kernel-path" : "/usr/local/bin", "lookup-gap" : "2" I can get a higher hashrate upping the intensity, but then the whole system freezes within an hour. On the current settings I can run overnight (did the first diagnostic yesterday eve), but am averaging 1.4 mh on three cards (around 4-450 each), and if I introduce more cards the system crashes within minutes. Also, even when Im only running three, everything runs fine unless I even touch the mouse, then the hashrate stops (Im using my laptop on SSH to command the miner). The only conclusion that I could come to, is that I dont have enough Ram - Im running 4 gb (2x2) of corsair ram - and the problem that keeps occurring, i.e system freeze is symptomatic of not having enough ram - although it could be a lot of other things as well I suppose (bad version of linux, etc..). You'll notice the thread concurrency is quite low, I did this as a result of seeing something somewhere about the TC and low ram balance.. Any help would be greatly appreciated!! Thanks Has anyone had similar problems Title: Re: linux Ubuntu 5 7950 GPU rig low hash and freezing Post by: ndunks on February 15, 2014, 03:35:25 PM FYI, Ive also dropped down GPUS 1 by 1, all the way down to one - the one with the VGA output to monitor, and still Im getting a shitload of HW errors :(
Title: Re: linux Ubuntu 5 7950 GPU rig low hash and freezing Post by: CryptoMer on February 15, 2014, 05:42:42 PM Give something like this a try.
"intensity" : "19", "vectors" : "1", "thread-concurrency" : "38912", "gpu-engine" : "1050", "gpu-memclock" : "1500", "gpu-powertune" : "20", "gpu-threads" : "1", "worksize" : "256", "scrypt" : true, "kernel" : "scrypt", "kernel-path" : "/usr/local/bin", "lookup-gap" : "2" 7950's appear to really like a high TC. :) |