New GPU...low hash rates...please help!

[thedonvon]

I just started mining and have been using my computers 6870.  Everything has been working pretty well and i have been getting about 300 Kh/s.  So i went to the store last night and after a bunch of research i purchased a 7870.  it was on sale and i saw online that people were getting hash rates of about 400-450 Kh/s. 

After installing my brand new second card i started mining, and the new card just will not perform!!!  i cannot get more than about 275Kh/s.  I searched and searched last night for hours trying to get this going.  I tried different thread concurrencies, intensities, pools, i updated the drivers to the newest version, as well as the newest BETA.  I DO NOT KNOW WHAT TO DO PLEASE HELP!!!! haha

Any suggestions?

[GiLa]

have you tried using 12.8 drivers?

[thedonvon]

I did install my card drivers...i have tried 13.1 which is the latest released and i have tried 13.3 (currently) which is the latest beta release.  Did not see much of a difference with each.  I will download and try 12.8 now.

[hate_the_face]

is this for bitcoin or litecoin?

[thedonvon]

I am doing Litecoins

[GiLa]

If the drivers dont work just try testing the 7870 by itself first to make sure its not a dud card
should be getting at least 350ish
400+ will require overclocking

[thedonvon]

I thought i would be getting in the 400 range after looking at this link. https://en.bitcoin.it/wiki/Mining_hardware_comparison

if you scroll down to the 7870s they are all showing in the 400+ range.  one entry is actually my card.  I have the MSI R7870

[thedonvon]

i cannot get 12.8 to run on my machine.  Uninstalled driver and reinstalled 12.8 and i get FC for catalyst and MMloader.  What other driver version should i try?

[GiLa]

If you read to the right side of the column it also says 1100 clock speed and the card you mention on that link is clocked at 1250 with changed heatsink

I also own a 7870 Gigabyte OC 1100MHz from the factory and a 7970 xfx ghost dd

anyways if you cant get 12.8 to run theres something wrong

what operating system do you have?

[Shrink]

I thought i would be getting in the 400 range after looking at this link. https://en.bitcoin.it/wiki/Mining_hardware_comparison

if you scroll down to the 7870s they are all showing in the 400+ range.  one entry is actually my card.  I have the MSI R7870

I am having exactly the same situation. Same card, mining litecoins only with 270k max. Bitcoin mining seems to be fine (apporx 420MHash).
If anyone would have a solution for this I would be more than happy.
I already tried different miners and different settings on intensity and thread-concurrency - still same result

[GiLa]

litecoin mining is abit different from bitcoin

clock/memory where memory should be higher

https://bitcointalk.org/index.php?topic=117221.0

try that

[thedonvon]

I thought i would be getting in the 400 range after looking at this link. https://en.bitcoin.it/wiki/Mining_hardware_comparison

if you scroll down to the 7870s they are all showing in the 400+ range.  one entry is actually my card.  I have the MSI R7870

I am having exactly the same situation. Same card, mining litecoins only with 270k max. Bitcoin mining seems to be fine (apporx 420MHash).
If anyone would have a solution for this I would be more than happy.
I already tried different miners and different settings on intensity and thread-concurrency - still same result

I am running win 7 ultimate x64.  I have uninstalled my other card so i am running with just the 7870 right now.  I will try the 12.8 again now.

[thedonvon]

12.8 will not run on my system.  I have uninstalled and reinstalled multiple times.  I am gettting FCs with not only catalyst but with other programs as well with 12.8 installed.  Computer is not running correctly with it installed.  Should i use 13.1?

[hate_the_face]

im using this batch configuration in cgminer 2.11.4 and getting an average of 350 kh/s and that is without any voltage changes. If you dont want to overclock it at all you can take out those setting after the --auto-fan stuff

cgminer --scrypt -o yourpool:port -u yourusername -p yourpassword --intensity 12 --worksize 256 -g 2 --thread-concurrency 5120 --auto-fan --auto-gpu --gpu-engine 1100 --gpu-memclock 1450  --temp-target 66

[Shrink]

im using this batch configuration in cgminer 2.11.4 and getting an average of 350 kh/s and that is without any voltage changes. If you dont want to overclock it at all you can take out those setting after the --auto-fan stuff

cgminer --scrypt -o yourpool:port -u yourusername -p yourpassword --intensity 12 --worksize 256 -g 2 --thread-concurrency 5120 --auto-fan --auto-gpu --gpu-engine 1100 --gpu-memclock 1450  --temp-target 66

Just tried that with that http://de.msi.com/product/vga/R7870-2GD5T-OC.html card. Still only 290khash and my fan is going crazy.

[hate_the_face]

my fan is usually spinning in the 2700-2900 rpm range but it keeps it around 64 degrees C and I dont get any hardware issues.

I am using an XFX card but I dont see why it would be much different.

This was also on ltcmine.ru stratum server im not sure what pool youre using

[thedonvon]

I am now having a problem with the SDK...when it is installed i cant get cgminer to run it crashes.  without it installed cgminer will run but didnt detect the GPU

[hate_the_face]

it's more likely crashing because of something else I'd say.

what does your batch file look like?

[Shrink]

BTW I also got a code for Tomb Raider Steam download and would trade it for 0.25 BTC or 14 LTC

[thedonvon]

OK so i reinstalled windows and fixed the crashing problem.  I have been messing with settings on my 7870 and am not getting results.  it seems like no matter what i make the settings i average about 280 kh/s. I have tried different thread concurrencies thread counts intensities and have tried both cgminer and guiminer scrypt.

I do not understand it.  I cannot get this card to perform.  This is very frustrating.  does any1 have a 7870 and can help me get setup with either guiminer scrypt or cgminer?  I tried the settings which were posted earlier in this thread and got the same result about 300 kh/s

[andy48]

I only use 7970's, but they worked out of the box.  I just can't use cgminer 2.11.x anything for some reason.  I use 2.10.x still.

Andy

[Vorksholk]

Try a 0.57 Core:Memory ratio (570 Core to 1000 Memory is a good starting point)

[Catanonia]

Check you are not accidently CPU mining at the same time.

I made that mistake with a tick box and it killed the AMD performance due to shared openGL

[thedonvon]

I checked and i am not cpu mining at the same time.

im using this batch configuration in cgminer 2.11.4 and getting an average of 350 kh/s and that is without any voltage changes. If you dont want to overclock it at all you can take out those setting after the --auto-fan stuff

cgminer --scrypt -o yourpool:port -u yourusername -p yourpassword --intensity 12 --worksize 256 -g 2 --thread-concurrency 5120 --auto-fan --auto-gpu --gpu-engine 1100 --gpu-memclock 1450  --temp-target 66

using these settings i am running at about 290 Kh/s

any suggestions how i can modify these settings to get some more out of the card?  I feel like the card has more in it, when i run my 6870 i get 290Kh/s and use these settings

--intensity 18 --worksize 256 --gpu-threads 1 --thread-concurrency 6720 --auto-fan --auto-gpu --gpu-engine 900 --gpu-memclock 1050

if i am getting 290 out of my 6870 i should definitely be able to get more out of my 7870!

also is there a way to have one GPU run with 1 thread and another with 2.  i tried --GPU-threads 1,2 but it will not work.  says "1,2" is not a number.  i am trying to set GPU0 to 1 thread and GPU1 to 2 threads

Thanks for everyones help!

[balistick]

Don't forget to erase the bin file in cgminer directory each time you change your launch parameters It may save some headaches !

[BladeRunner]

I only use 7970's, but they worked out of the box.  I just can't use cgminer 2.11.x anything for some reason.  I use 2.10.x still.

Andy

I used them out of the box and never had any problem.
thats really bizarre that 2.10 works and .11 does not.  using the same config file from .10?

[thedonvon]

Don't forget to erase the bin file in cgminer directory each time you change your launch parameters It may save some headaches !

Never knew to do this thank you for that tip!!!

still cant figure out how to set GPU0 to 1 thread and GPU1 to 2 threads???

also any setting tweaks from my earlier post that will get me better hashrate?  Thanks!!!!!