Litecoin mining tips?

[The Extreme]

Greetings-

I have entered into the world of mining Litecoin!  As I am new at this (as with most things crypto-currency) I wanted to see what I might do to improve my results.

First off, my hardware:
Athlon II X4 640
8 GB PC3-14900 DDR3 RAM
Sapphire HD 7870 XT 2GB
Windows 8  Pro

I'm running the latest Beta Catalyst drivers from AMD (12.104 drivers I think?).
I'm running cgminer - GUI miner does not want to work.
I am part of a pool, not a solo miner. 

My setting so far on cgminer are:
--scrypt
--thread-concurrency 16384
--lookup-gap 2
--gpu-threads 1
-I 18
-w 256

I'm getting about 400 kH/s with this setup.  I should note the card is slightly underclocked - 850 MHz core and 1500 Mhz memory. Yes, that seems counter intuitive, but I saw that advice on a board recently and it's been my best result.  Still, I'm getting only 400 kH/s and because my card is uses a Tahiti GPU (albeit an LE-based Tahiti), I'm thinking should be able to get closer to 500.  This config runs the card up to 83 degrees C and the fans are running at 78 percent or so. 

My questions:
-Any ideas on diff settings that might do better for me?
-I'm trying to hold my card temps to 85 C or below...  Is 85 too high?  I know most of us would prefer to see temps below 80 or even 70 full time. 
-I'm trying to hold the fan spin rate to 90 percent or below. 

This setup is yielding about 1 LTC per day - not too bad, I suppose - and I'm getting very few stale hashes too.  But I know there are those on this board who could help me get more out of my setup.  I want to maximize my hashing, but neither am I interested in seeing my GPU melt down in a year. 

I'm curious to hear any advice anyone might have. 

Thanks!

The Extreme

[1714824015]

1714824015

[The Extreme]

bump

[The Extreme]

Wow... surprised no one seems to be able to offer advice on this one   
Let's try one more:
bump

[i3lome]

I figured a pro would help you by now. I mine with CPU but i looked up some stuff for you and these are the settings and speeds I have found.


7970

631 ~kh

290W

925 MHz

1375 MHz

cgminer 3.1.0

--worksize 256 -v 1 -I 13 -g 2 --thread-concurrency 8192 --lookup-gap 2 --shaders 2048 --temp-target 75 --temp-overheat 80 --temp-cutoff 85 --auto-fan --gpu-fan 0-80. 13.5beta2 catalyst drivers, SAPPHIRE HD 7970 3GB GDDR5 (11197-11) not overclocked. Running at 75° - 80° dependant on weather. Wattage measured at power plug with an istrument. Proof: http://i42.tinypic.com/34exdsh.jpg
 


7970

522 ~kh

250w TDP

950 MHz

1700 MHz

Reaper v13 Beta 4

@ 256 Worksize @ vectors 1 @ Aggression 13 @ threads_per_gpu 1 @ sharethreads 32 @ lookup_gap 2 @ gpu_thread_concurrency 24576 -- RAM OC'd to 1866MHz (Affect unknown), 13.2 drivers. A higher aggression results in lag and a lower rate. Full build: http://pcpartpicker.com/p/CLNL Would love to see the magic formula for 600KHash/s+
 


7970

800 ~kh

?

1130 Mhz

1935 Mhz

Cgminer 2.11.4

-g2 -i 13 -w 256 --thread-concurrency 20480 Full water cooled Sapphire 7970 reference with OC edition BIOS update 55º/60º. http://i1270.photobucket.com/albums/jj601/emmanuel_ortiz1/800_zps97f7364d.jpg @Sweeppicking
 


7970

525 ~kh

?

1050 MHz

1900 MHz

cgminer 2.11.4

-g 2 -I 18 -w 256 --gpu-powertune 20 --lookup-gap 2 --shaders 2048 --gpu-memclock 1900 --gpu-engine 1050. Card is XFX Radeon HD 7970 Double D 3GB DDR5 2XmDP HDMI
 


7970

682 ~kh

204W

1000 MHz

1600 MHz

cgminer 2.10.4

--shaders 2048 --thread-concurrency 8192 -I 13 -g 2 -w 256 Card is a Gigabyte GV-R797OC-3GD, Catalyst 12.10. Wattage measured approx. with killawatt-ez. Operating temp is 72C. OC done with MSi Afterburner. GUI interaction/100% cpu lowers hashrate slightly.
 


7970

580 ~kh

?

1170 MHz

1600 MHz

Reaper v13 Beta 4

@ 256 Worksize @ vectors 1 @ Aggression 13 @ threads_per_gpu 1 @ sharethreads 28 @ lookup_gap 2 @ gpu_thread_concurrency 24576, 13.1 drivers. -- Gigabyte GV-R797OC-3GD (GPU & RAM overclocked)
 


7970

770 ~kh

?

1130 MHz

1900 MHz

cgminer v 2.11.3

--scrypt --gpu-engine 1130 --gpu-memclock 1900 --shaders 2048 --thread-concurrency 8192 -I 13 -g 2 -w 256 --lookup-gap 2 -- Diamond reference card, full watercooled block, running at 1.150V @ 43C. Proof: https://i.imgur.com/n5eZ03d.png
 


7970

730 ~kh

?

1050 MHz

1700 MHz

cgminer v 3.1.0

--scrypt --gpu-engine 1050 --gpu-memclock 1750 --shaders 2048 --thread-concurrency 8192 -I 13 -g 2 -w 256 --lookup-gap 2 -- MSI Lightening Boost Edition (Can be pushed to >750 Kh/s with some more tweaking) Proof: http://imgur.com/bUicPyN
 


7970

750~kh

?

1085 MHz

1500 MHz

cgminer v 2.11.2

--scrypt --worksize 256 -g 2 -I 13 --lookup-gap 2 --gpu-engine 1085 --gpu-memclock 1500 --shaders 2048 -- Card is a Gigabyte GV-R797OC-3GD, Temp: 70.0°C, 1.170V, Catalyst 13.1
 
From Ltc Hardware Comparison

[bitcoin-world.de]

I have 2x Gigabyte 7950 it was clocked by stock with Core 1000 Mhz and Ram 1250Mhz and was running at high 1.25V . The Temps were by 75° -85°.
Have downgraded Bios, then they run now at 1100Mhz Core and 1250Mhz Ram at 1.1 V and runs much cooler now (5°-8° Difference) with the same hashrate each Card 650khash/s in LTC. If someone needs help in mining write me PM.

[svetlyu]

2x Sapphire HD7850 1GB DUAL-X
Win 7x64

Code:

cgminer.exe --scrypt -o stratum+tcp://pool:port -u worker -p pass --worksize 256 --lookup-gap 2 --thread-concurrency 4800 -g 2 --intensity 12

Overclocked with MSI Afterburner at 1165MHz GPU, 1225MHz mem, 20% Power Limit, 1145mV vgpu
https://i.imgur.com/h9KsLMH.png

[Tywill]

who mines with a cpu? Is that even worth the power?

[i3lome]

who mines with a cpu? Is that even worth the power?

I do, if your trying to make a quick profit, don't.  I get around ~23kh/s which gets me 1 Ltc over around 2 months. I do it because I like crypto and don't have the money to buy in and get a GPU. So I mine slow then use Btc-E to multiply my LTC. Went from 0.2LTC to 4.69 Ltc in a month

[The Extreme]

Thanks all    This info will be useful.
I'll be sure to be back in touch for any questions...