Topic: CGMiner 7950 StartMining.bat - What am I missing? Only getting 300KH/s scrypt (Read 14430 times)

I think some cards are just not as good as others.

I have the Sapphire 3gb 7950 and the most I can get regularly is 560Kh/s at i-18. People always claim to get over 600 but I have yet to get over 600 using countless settings. I think it is a matter of silicon lottery.

Although there are config variations due to bios, binning and PCB construction, these are pretty hard set rules with GCN:

 With 2 (or 4 ) threads, you cannot run above intensity 13 without hw errors. If you set very high thread concurrency (optimal value is definitely highly variable) with 2/4 threads and 13 intensity, you can sometimes get decent hashrates.

Alternatively, run a single thread at high aggression and tune the thread concurrency through experimentation. Start somewhere around 240000, move by multiples of 1024/512 etc until you hone in. 

What is your cgminer settings for the 715KH/s card?

With adequate cooling, i am able to achieve 715KH/s on the outside card.  The inside card is currently not on a riser, and doesn't have room to ventilate due to the card on the outer most 16x PCI-E slot. So I have it at -I 12 whilst the outer card is at -I 20. Both run flawlessly with out a single HW error. Thanks again for the tips everyone. Once I have all four cards mounted with risers/powered risers for both 16x, I will have each card running at 715KH/s+ for a total hashing power of  2,860KH/s.

No, my cards are not 7970s! They are 7950s. I have no idea why I'm able to achieve such an amazing hash rate. The only thing I can think would be the fact that I am using 12.8 AMD drivers and 2.7 SDK drivers.

I think some cards are just not as good as others.

I have the Sapphire 3gb 7950 and the most I can get regularly is 560Kh/s at i-18. People always claim to get over 600 but I have yet to get over 600 using countless settings. I think it is a matter of silicon lottery.

cgminer --scrypt -o http://yourpooladdresshere.com:PORT# -u Miner.X -p XXX -I 13 -g 1 --thread-concurrency 22400

7xxx series cards
Use reaper or cgminer versions 2.11.3 and up (see update below).  Set thread_concurrency to somewhere slightly below 64 * bus_width_of_card_in_bits.  So, for a 7950, that would be 64 * 384 = 24576; ideal values are 21712 or 24000.  Find your bus width here: http://en.wikipedia.org/wiki/Southern_Islands_(GPU_family)

To find the optimum thread_concurrency for your card, you will need to search above and below this estimate ideal value and see what is fastest.

Hi OP.

I wrote a detailed post on how I fixed the same problem on my setup which is almost the same as yours, only diff is I have 2 7950s & *Mb ram.
https://bitcointalksearch.org/topic/m.2152164

I'm not sure which of the changes I made fixed the problem, but what I would try with your setup is this...

Open a new CMD window and run the setx commands. then close that window, you don't need to run that again. The setx commands do not affect the windows they are run in, only windows opened later.
http://www.tomshardware.com/forum/57485-45-setting-environment-variables

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

Move the .bat settings to a cgminer.conf file. The one I used is in my post I linked to. Try that.
You will need to specify 3 GPU values where I have used 2.
"thread-concurrency" : "14336,14336,14336"

Reboot & Start CGMiner

You could also try using CGMiner 3.1

Let us know how it goes.

I think you need to put -g 2 instead of -g 1

CGMiner 2.8.2
AMD 12.8
SDK 2.7

Seasonic Gold 80+ 1250W Modular
Corsair 4GB DDR 3 1666MHZ
ASUS M5A97 R2.0
500 GB Laptop Drive (soon to be replaced by a 60GB SSD OCZ)
Sempron 145 O/C'd to 3.6 GHz stable. MOBO has built in auto O/C features.
MICRO USB EDIMAX WIFI N

.bat looks like

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -o http://binarycoins.eu:9333/ -u p -p 1 -I 13 --shaders 1792 -g 1 --gpu-threads 2 --thread-concurrency 7168 --lookup-gap 2 --worksize 256

What am I missing? I can only pull 300KH/s per card. With -I 20 I can pull 670KH/s per card with all HW errors.

I just did a fresh install of windows, turned auto updates off. If that makes any difference. I am having trouble understanding --shaders XXXX and --thread-concurrency XXXX

Cgminer let me set the TC to 25088 before I started giving mem value too high for cgminer. Had to drop it back to 7168. When I changed the value my kh/s went unaffected. Am I missing a command somewhere? Is --aggression the same as intensity? Any other commands I should try? This is mind boggling since I've ran them @600khs each no problem. I was a retard and didn't save my .bat compilation before formatting. Should I try different drivers? Different version of cgminer?

Changed settings again, same results. :/ Why is CGMiner going GIMPY on me?

http://s14.postimg.org/7s0rcze0h/IMG_20130520_145654.jpg

Suggestions please.

I can't get these cards to act right!