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Alternate cryptocurrencies => Altcoin Discussion => Topic started by: nandika on May 02, 2013, 04:26:59 PM


Title: Scrypt 5850 - Too many HW errors?
Post by: nandika on May 02, 2013, 04:26:59 PM
I'm trying to mine scrypt with 2x 5850 via cgMiner.

My details:
 Block: 2c14ce7cb066c8ee...  Diff:5.43M  Started: [18:25:24]  Best share: 214

 (5s):626.0K (avg):400.8Kh/s | A:3  R:0  HW:42  U:0.5/m  WU:460.5/m
 ST: 4  SS: 0  NB: 4  LW: 34  GF: 0  RF: 0


 GPU 0:                | 336.4K/197.3Kh/s | A:1 R:0 HW:23 U:0.19/m I:16
 GPU 1:                | 291.0K/171.2Kh/s | A:2 R:0 HW:11 U:0.39/m I:16

Anyone knows why are so many HW errors?

cgminer submits ~1 share / minute or even less..

Any recommendations?


             total       used       free     shared    buffers     cached
Mem:          7950       1864       6086          0        268        740



Cards are at 849gpu, 1100ram.

Mining SHA256 type coins at ~340MH/s.

Thanks for the help!

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: chungenhung on May 02, 2013, 08:58:09 PM
lower your clocks??

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: tycho on May 02, 2013, 09:26:52 PM
You should never have any hardware errors if things are set up correctly.

Try fiddling with: intensity, thread concurrency, # of threads, and clock speed in that order.

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: MashRinx on May 02, 2013, 10:48:28 PM
I had lots of issues with scrypt mining with CGminer.  I have almost identical hardware across several machines that would run mine BTC fine, but when switching to LTC, some were fine and others threw all kinds of HW errors, even with very low settings.  I was running out of ideas and decided to try BFGminer just for giggles and it ended up working well.

I'm a big fan of CGMiner, but for my limited LTC mining experience I had much better luck with BFGMiner.

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: pekv2 on May 02, 2013, 10:50:38 PM
Here is my cgminer config for litecoin mining for my two 5850's. If you like to give it a try. Watch your temps, these overclocks are good for cool weather. My room ambient temp is 20c atm,

and results are

Code:
[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
GPU 0:  68.0C 3479RPM | 401.9K/401.3Kh/s | A:394 R:1 HW:0 U: 5.07/m I:19
GPU 1:  69.5C 3271RPM | 400.7K/400.9Kh/s | A:415 R:1 HW:0 U: 5.34/m I:19

cgminer.conf Fill the pools info of yours.
Code:
{
"pools" : [
	{
		"url" : "pool1:port",
		"user" : "username.1",
		"pass" : "password"
	},
	{
		"url" : "pool2:port",
		"user" : "username.1",
		"pass" : "password"
	}
]
,
"intensity" : "19,19",
"thread-concurrency" : "5824,5824",
"vectors" : "1,1",
"worksize" : "256,256",
"kernel" : "scrypt,scrypt",
"gpu-fan" : "0-75,0-75",
"gpu-vddc" : "1.088,1.088",
"gpu-engine" : "0-944,0-944",
"gpu-memclock" : "1180,1180",
"gpu-memdiff" : "0,0",
"gpu-powertune" : "0,0",
"temp-cutoff" : "0,0",
"temp-overheat" : "102,102",
"temp-target" : "100,100",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-threads" : "1",
"log" : "5",
"queue" : "1",
"retry-pause" : "5",
"scan-time" : "60",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"
}

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: nandika on May 04, 2013, 12:04:52 PM
Quote from: pekv2 on May 02, 2013, 10:50:38 PM
Here is my cgminer config for litecoin mining for my two 5850's. If you like to give it a try. Watch your temps, these overclocks are good for cool weather. My room ambient temp is 20c atm,

and results are

Code:
[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
GPU 0:  68.0C 3479RPM | 401.9K/401.3Kh/s | A:394 R:1 HW:0 U: 5.07/m I:19
GPU 1:  69.5C 3271RPM | 400.7K/400.9Kh/s | A:415 R:1 HW:0 U: 5.34/m I:19

cgminer.conf Fill the pools info of yours.
Code:
{
"pools" : [
	{
		"url" : "pool1:port",
		"user" : "username.1",
		"pass" : "password"
	},
	{
		"url" : "pool2:port",
		"user" : "username.1",
		"pass" : "password"
	}
]
,
"intensity" : "19,19",
"thread-concurrency" : "5824,5824",
"vectors" : "1,1",
"worksize" : "256,256",
"kernel" : "scrypt,scrypt",
"gpu-fan" : "0-75,0-75",
"gpu-vddc" : "1.088,1.088",
"gpu-engine" : "0-944,0-944",
"gpu-memclock" : "1180,1180",
"gpu-memdiff" : "0,0",
"gpu-powertune" : "0,0",
"temp-cutoff" : "0,0",
"temp-overheat" : "102,102",
"temp-target" : "100,100",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-threads" : "1",
"log" : "5",
"queue" : "1",
"retry-pause" : "5",
"scan-time" : "60",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"
}

Thanks for your config file, however I get this error when I try to mine with it:


 [2013-05-04 14:04:01] Maximum buffer memory device 0 supports says 134217728
 [2013-05-04 14:04:01] Your scrypt settings come to 381681664
 [2013-05-04 14:04:01] Error -61: clCreateBuffer (padbuffer8), decrease TC or in
crease LG
 [2013-05-04 14:04:01] Failed to init GPU thread 0, disabling device 0
 [2013-05-04 14:04:01] Restarting the GPU from the menu will not fix this.
 [2013-05-04 14:04:01] Try restarting cgminer.


What could be the problem? The box has 8G ram, the 5850 has 1G.

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: pekv2 on May 04, 2013, 01:49:29 PM
Post in here

https://bitcointalk.org/index.php?topic=28402.9960;topicseen

to see if someone could help you with the errors.

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: pekv2 on May 04, 2013, 06:33:24 PM
Try "thread-concurrency" : "5760,5760", .

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: monokaskade on May 04, 2013, 06:40:18 PM
Quoted from https://github.com/ckolivas/cgminer/blob/master/SCRYPT-README

Quote
Step 1 on linux:
export GPU_MAX_ALLOC_PERCENT=100
If you do not do this, you may find it impossible to scrypt mine. You may find
a value of 40 is enough and increasing this further has little effect.

export GPU_USE_SYNC_OBJECTS=1
may help CPU usage a little as well.

On windows the same commands can be passed via a batch file if the following
lines are in the .bat before starting cgminer:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: lopalcar on May 04, 2013, 06:44:37 PM
I'm having the same problem... I just connected a second 5850 identical to the first wich was working fine for months beside a 5970 and now I'm getting hardware errors only in this new one "could be for using a 1x to 16x pcie riser??" if not that I don't know, it was working fine to in other computer before pluging it in this rig baside this other tow cards...

Title: Re: Scrypt 5850 - Too many HW errors?
Post by: pekv2 on May 04, 2013, 08:21:42 PM
Quote from: monokaskade on May 04, 2013, 06:40:18 PM
Quoted from https://github.com/ckolivas/cgminer/blob/master/SCRYPT-README

Quote
Step 1 on linux:
export GPU_MAX_ALLOC_PERCENT=100
If you do not do this, you may find it impossible to scrypt mine. You may find
a value of 40 is enough and increasing this further has little effect.

export GPU_USE_SYNC_OBJECTS=1
may help CPU usage a little as well.

On windows the same commands can be passed via a batch file if the following
lines are in the .bat before starting cgminer:
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

Isn't this for 7k series cards?


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