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Here's the config file I'm using:

{
"pools" : [
                {

"url" : "stratum+tcp://stratum.give-me-ltc.com:3333",
                "user" : "xxxxxx",
                "pass" : "xxxxxx"
}
]
,
"intensity" : "14",
"vectors" : "1",  
"worksize" : "256",
"kernel" : "scrypt",
"auto-fan" : true,
"auto-gpu" : true,
"temp-cutoff" : "85",
"thread-concurrency" : "8192",
"intensity" : "13",
"lookup-gap" : "2",
"temp-overheat" : "75",
"temp-target" : "63",  
"expiry" : "30",
"gpu-dyninterval" : "7",
"log" : "5",
"queue" : "1",
"retry-pause" : "5",
"scan-time" : "30",  
"scrypt" : true,    
"temp-hysteresis" : "3",
"shares" : "0"
}


Any idea what is wrong?

nothing. its a crapy miner :(.

you can try higher intensity, also sometimes concurrency 8000 is much faster than 8192.
dont use 12.10 drivers!

What miner should I be using? I've tried GUIMiner-scrypt and I get less kh/s.

And I believe I'm on beta driver 13.3.


EDIT:

Still having problems :(

I managed to get my speed up to 290-295 kh/s if I turn the intensity up to 17 or so. But I've heard people getting 350 kh/s at intensity 13 with my card.

Just worked through this exact same issue, but with reaper.
What got me mining at ~350 KH/s was changing the gpu_thread_concurrency to 15000. 
More or less copied settings for the 7870, and it worked. 
There is no where I could find that had the 7860 settings filled in in a guide.
You can probably get more KH/s by working with the concurrency.

Solution was found in tacotime's post at https://bitcointalk.org/index.php?topic=117221.msg1256502#msg1256502 (https://bitcointalk.org/index.php?topic=117221.msg1256502#msg1256502). 

Can you post the rest of your settings? I'm only getting around 280 KH/s on my 7850.

I ment the GPU not the cgminer.nice that you  have foud a solution.

I don't use cgminer, but reaper.
But, I get 360kh/s, so that hashrate is pretty low.
My clock speeds: 1150 core, 6000 mem (just when I am not using my pc for a few hours), and 1250-1300 core, 6000 mem (when I just want to mine).
I can post my Reaper settings, maybe U use the wrong concurrency:
worksize 256
vectors 1
aggression 19
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 15360

The aggression won't go 20, it'll BSOD.

I don't know if your card will reacht such clocks, I am very lucky to get such speeds, and ofcourse your temps, I have a Asus HD7850 with the DCII cooler, fan @50-55% is 50 Degrees celcius (18 degrees room temperature) at those clocks.

What you can do to get higher clocks, is let it mine for 5 minutes at stock, then slowly increise your clock with 10 mhz and the same with mem, but mem BSOD's above 1500, period.

I tried to set the gpu_thread_concurrency to 15000, but I get the following error message:



 [2013-04-06 10:34:38] Started cgminer 2.11.3
 [2013-04-06 10:34:38] Started cgminer 2.11.3
 [2013-04-06 10:34:38] Loaded configuration file cgminer.conf
 [2013-04-06 10:34:38] Probing for an alive pool
 [2013-04-06 10:34:39] Stratum from pool 1 detected new block
 [2013-04-06 10:34:39] Maximum buffer memory device 0 supports says 536870912
 [2013-04-06 10:34:39] Your scrypt settings come to 1006632960
 [2013-04-06 10:34:39] Error -61: clCreateBuffer (padbuffer8), decrease CT or in
crease LG
 [2013-04-06 10:34:39] Failed to init GPU thread 0, disabling device 0
 [2013-04-06 10:34:39] Restarting the GPU from the menu will not fix this.
 [2013-04-06 10:34:39] Try restarting cgminer.
Press enter to continue:

Did you even read my comment?
Anyway, use Reaper, much better and less error, I promise (at least if you configure it the right way ofc.)
And you can copy paste the setting I gave you, you only have to edit the pool (don't use http:// before the pool addres).

Thats it.

Yes I did, sorry, I got reaper and followed the instructions, but when I open it the window opens for a split second then closes, any idea?

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


cgminer versions 2.11.3 and up can be used to mine with high thread concurrencies now.  Follow these instructions:
WINDOWS: Open console and type
Code:
setx GPU_MAX_ALLOC_PERCENT 100
Now, close the console (it will not work if you open cgminer in the same window).  Open cgminer using a .bat or a new console, high thread concurrencies will now work.

LINUX: Open terminal and type
Code:
export GPU_MAX_ALLOC_PERCENT=100
Now high thread concurrencies should work in cgminer.

As meebs points out, in order to go above 8192 thread concurrency with cgminer, you have to set the GPU_MAX_ALLOC_PERCENT.

If you use setx in Windows, you only have to do it once, because it writes the setting to the registry.

Here are the cgminer settings I use:

350kh/s, no overvolting, desktop usable:
--scrypt --gpu-fan 0-100 --gpu-engine 1050 --gpu-memclock 900 --intensity 12 --thread-concurrency 13632   --gpu-threads 2

365kh/s, overvolted, desktop usable:
--scrypt --gpu-vddc 1.225 --gpu-fan 100 --gpu-engine 1150 --gpu-memclock 1000 --intensity 12 --thread-concurrency 13632   --gpu-threads 2

390kh/s, overvolted, desktop unusable:
--scrypt --gpu-vddc 1.225 --gpu-fan 100 --gpu-engine 1150 --gpu-memclock 1000 --intensity 19 --thread-concurrency 27164

Yeah I tried Guiminer today, WOW, on the same clock speeds (1150 core, 1500 mem) and NO overvolting I get 395!!! Kh/s @200 watt total system power, thats what I call making a profit...
Also, watch your temps, the Asus card I have doesn't reach over 51 degrees @50% fan, its awesome.

Good luck... (Also, if you want to try guiminer, select the 7850 high preset and change intensity to 18-19, then your done with the card settings!)

Thanks, it now runs at 15000 thread conc, but hash speeds haven't really changed :( Still getting about 305-310 kh/s on intensity 18.