Pool hash rate problem

[janpec1000]

Hello guys,

I am currently having problem of pools different hash rate than mine on GUIminer. Guiminer shows 800Khahs while coinotron shows 80Khahs rate. I am wondering if its possible due to inproper settings or could it be due to hardware errors, which are not reported in GUIminer or at least i dont know where to find them.

GUI miner settings
gpu threads 2
intensity 20
worksize 256
t concurency 20480
khash 770

I have tried to change settings all arround to different ones but its usually parox the same, some settings have 90% loss in hash rate and some 40% but couldnt get better than that.

[Xippe]

I'll do have the same problem.
I am using cgminer @ 1350 kh/s while all pools i tried showing only ~131 kh/s.

I also tried different settings, but nothing has worked. Is there a general problem?

[crazyates]

In cgminer, what's our WU: rate?

[Xippe]

 GPU 0:  84.0C 2053RPM | 807.9K/768.2Kh/s | A:672 R:0 HW:13641 WU:  2.5/m I:20
 GPU 1:  89.0C 2282RPM | 529.6K/530.4Kh/s | A:19559 R:125 HW:2064 WU: ~100/m I:13

[satsumi]

Your machine is seriously misconfigured. WU is what the pool actually sees and should be 90% of the hashrate. "HW" is hardware errors and should almost always be 0.

[Xippe]

Huh. Now i changed many settings.

 GPU 0:  77.0C 1854RPM | 536.9K/540.1Kh/s | A:4064 R:0 HW:0 WU: 459.9/m I:13
 GPU 1:  82.0C 2109RPM | 532.7K/534.4Kh/s | A:5280 R:0 HW:0 WU: 496.6/m I:13

The HW-Errors are the main problem here @ janpec1000.

But im not happy with my hashrate, how could i increase it now?
Intensitiy cant be set up higher, there will instantly start counting the HW-errors.

[satsumi]

Set gpu threads to 1, you can get higher intensities. At any given intensity 2 threads will be a percent or two higher hashrate, but intensity 19 with 1 thread is much better than 13 with 2.

[CrayjeksAjek]

Huh. Now i changed many settings.

 GPU 0:  77.0C 1854RPM | 536.9K/540.1Kh/s | A:4064 R:0 HW:0 WU: 459.9/m I:13
 GPU 1:  82.0C 2109RPM | 532.7K/534.4Kh/s | A:5280 R:0 HW:0 WU: 496.6/m I:13

The HW-Errors are the main problem here @ janpec1000.

But im not happy with my hashrate, how could i increase it now?
Intensitiy cant be set up higher, there will instantly start counting the HW-errors.

Your GPU temps are fairly high as well and could lead to failure.

[crazyates]

Wait, what GPUs are you running? Your setting seem awfully wonky. You should never be using that high of a TC, that high of an intensity, with 2 threads. You should either stick with one thread, or lower your TC AND intensity.

Example:
For a 290, you would run it at TC 32765, intensity of 19, and 1 thread.
For a 280x, you would run it at TC 8192, intensity of 13, and 2 threads.

Losing the hardware errors and increasing the WU is all you care about. Most of the time, your WU will be ~90% of your hashrate, so obv a higher hashrate is good, but hashrate is nothing without WU.

[Xippe]

Well, i tried some Options you were given.

@ CrayjeksAjek
The Temps are okay, i set up the fan speed, but it didn't worked.

@ crazyates

I'm running 2x sapphire 290 tri-x. So i switched the TC to 32765.
But cgminer crashed with the following message:

 [2014-02-06 17:03:46] Started cgminer 3.7.2

 [2014-02-06 17:03:47] Pool 0 difficulty changed to 32
 [2014-02-06 17:03:48] Maximum buffer memory device 0 supports says 53687091
2
 [2014-02-06 17:03:48] Your scrypt settings come to 2147287040
 [2014-02-06 17:03:48] Error -61: clCreateBuffer (padbuffer8), decrease TC o
r increase LG
 [2014-02-06 17:03:48] Failed to init GPU thread 0, disabling device 0


So i'm using only a few commands
-I 13 -w 512 -g 1 --thread-concurrency 8192

-g 2 will fix the kh/s rate to 540-550

But i'm really confused - 536870912 are only 512 MB, but i have 4gb per card.

[crazyates]

Are you in Windows or Linux? You need to use the GPU_MAX_ALLOC_PERCENT 100 thing. Google it for the exact command you need to run for your OS. Then try the high TC.

[Xippe]

Hey, sorry i didn't replied earlier.
I'm using Win7 and i already did the setx ... 100 thing and the other setx ... 1 thing too.

Nothing worked. I'm setting up a new win7. Maybe this will fix the problem?!
I already installed the latest beta drivers upgraded from v13.11.

Edit:
Just a little update: after restarting the pc, everything is working now!

-I 20,13 -w 512 -g 1 --thread-concurrency 57000,16384 - 815, 550 kh/s. second one is the desktop card, needed that low intensitiy for working on desktop.

But i don't understand how some people get about 900 kh/s with the same card. it's a mystery to me