315 KH/s mining litecoin

[Vader]

Hi. I'm mining litecoin on a 7870 ghz edition, and only getting 315 kh/s. When i first got my card, it was getting only about 240 kh/s and i dont know why. I saw here (https://litecoin.info/Mining_hardware_comparison) that the 7870 should be getting 375-400. I overclocked my card, and im stuck at 315 kh/s. Any reason why im getting such a low hashrate? 

 

Posted a picture of what my overclock looks like 

[Morpheus]

wow are you sure you need 1.3v for that overclock? seems overkill voltage

[Vader]

wow are you sure you need 1.3v for that overclock? seems overkill voltage

its a starting point. havent gotten around to lowering it and stress testing it. 

[Bluejay0]

Dat voltage...

 

Try using a different mining program?

[Vader]

Dat voltage...

 

Try using a different mining program?

I've been using CG miner. and I cannot get BFGminer to work. It wont detect my graphics card

[Hans Christian | Teri]

Have you tried running it at stock clocks / using suggested clocks?

[Morpheus]

its a starting point. havent gotten around to lowering it and stress testing it. 

that's the first thing you need to do lol lower that voltage

[Hans Christian | Teri]

On another note what OS are you running? Most people are getting the best rates on linux boxes.

[Vader]

Have you tried running it at stock clocks / using suggested clocks?

running at stock clocks, i got about 200 kh/s which is abnormally low for a 7870. and ive been using different suggested clock speeds. this is the highest ive gotten using a friends suggestions 

[sabot]

I have a 6870 and I get around 275kh/s

[Vader]

On another note what OS are you running? Most people are getting the best rates on linux boxes.

windows 7 ultimate 64 bit

[Vader]

that's the first thing you need to do lol lower that voltage

could me having a higher voltage be affecting my hashrate?

[Vader]

And another thing, i get this on the command prompt, saying i get 315 kh/s ( http://gyazo.com/4e6bd4d746dbbb6444b0273121f93b69 ) but here, it says i get 364 kh/s http://gyazo.com/9b42353c9f90a4c205ee249fbaee93e7

[Morpheus]

could me having a higher voltage be affecting my hashrate?

maybe, you never know.

[helping]

You'd have to read carefully, saw 2 7870 getting 300 and 320 KH/s (XFX 7870 GHz Edition and Powercolor AX7870)

wouldn't make much sense. 7850's do better than that. The 7870 should be in the 400 range 

[TechFan@ic]

Try these settings : GPU Threads=2   Work Size=64   Thread Concurrency=12 .

Run the card at stock voltage with 1050mhz core clock at intensity=13 .

Also try the exact same settings but change out the GPU Threads to 1 and see which is better.

[ShadyHost]

mess with your config settings. I think that a 7870 should be getting around 450kh. 

 

My rig gets:

6870 - 340kh

6950 - 520kh

4770k - 100kh

GTX 780 - 350kh

[Vader]

Anyway, which 7870 you've? (Asus, XFX, Tul,... )

powercooler, its a leaf blower lol

[TechFan@ic]

powercooler, its a leaf blower lol

Did you try the new settings ? I get 717 KHash/S on my 7970 at stock with similar settings.

It all has to do with the GCN architecture, the GPU threads correspond to the number of asynchronous compute engines (ACEs) on the chip, the worksize corresponds to how many GCN cores exist per compute unit and the thread concurrency is the number of compute units divided by the number of ACEs.

[Vader]

Did you try the new settings ? I get 717 KHash/S on my 7970 at stock with similar settings.

It all has to do with the GCN architecture, the GPU threads correspond to the number of asynchronous compute engines (ACEs) on the chip, the worksize corresponds to how many GCN cores exist per compute unit and the thread concurrency is the number of compute units divided by the number of ACEs.

I tried your settings, and after 5 minutes I havent gotten any shares, where as when i had it the other way, i was getting 1 share every 5-10 seconds. 

http://gyazo.com/c813b6cfab104d7e38a052ee07270c7a

[TechFan@ic]

I tried your settings, and after 5 minutes I havent gotten any shares, where as when i had it the other way, i was getting 1 share every 5-10 seconds. 

http://gyazo.com/c813b6cfab104d7e38a052ee07270c7a

That's just weird.

[TheYoungEnthusiast]

Any Hardware Errors? In the command prompt when running CGminer look for "HW: " and if there is a 0 beside it thats good. If there is a number beside it that means you have a hardware error.

[Vader]

Any Hardware Errors? In the command prompt when running CGminer look for "HW: " and if there is a 0 beside it thats good. If there is a number beside it that means you have a hardware error.

yeah i just noticed this, im getting a lot of hardware errors. what could cause them?

[RuecanOnRails]

HW errors can be caused by many things.

Instability with the clock settings, try lowering memory and core a little. Thread concurrency might be too high, intensity might be to high. Lower intensity by 1 and see if it gets better. If not keep lowering intensity. You could cutting thread concurrency in half, set intensity to 13, and use 2 GPU threads. If you're already using 2 GPU threads, try using 1.

 

 

On https://litecoin.info/Mining_Hardware_Comparison Have you tried using the exact settings suggested? Try using an older version of the miner.

[Vader]

HW errors can be caused by many things.

Instability with the clock settings, try lowering memory and core a little. Thread concurrency might be too high, intensity might be to high. Lower intensity by 1 and see if it gets better. If not keep lowering intensity. You could cutting thread concurrency in half, set intensity to 13, and use 2 GPU threads. If you're already using 2 GPU threads, try using 1.

I had my thread concurrancy on 8192 and it was getting hardware errors. Put it on 15232 and it worked. Getting 290 Kh/s on 17 intensity with no hardware errors. I think it's just my card manufacturer being the cause of my low hash rates.

On https://litecoin.info/Mining_Hardware_Comparison Have you tried using the exact settings suggested? Try using an older version of the miner.