--scrypt --worksize 64 --lookup-gap 2 -g 1 --thread-concurrency 1792 --intensity 10  - work = ~60kH/s

with increasing --thread-concurrency = Error -5: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
only whit --thread-concurrency 1792 work but poor

with increasing over --intensity :
on intensity 11 - Accepted 100% at 135kH/s
on intensity 12 - Accepted / Rejected = 50/50 at ~270kH/s  (target-miss)
on intensity 19 - Rejected 100%  at ~490kH/s  (target-miss)

with increasing worksize to 256 with intensity 11, thread-concurrency 1792 lookup-gap 2
Accepted / Rejected = 75 / 25 at 135kH/s  (target-miss)

only --lookup-gap 2
and -g 1

--scrypt --shaders 1792 -g 1 --thread-concurrency 1792

and :

--lookup-gap 2 - work = 4.0Kh/s
--lookup-gap 3 - crash = Error -5: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
--lookup-gap 4 - crash = Error -5: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
--lookup-gap 5 - crash = Error -5: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
--lookup-gap 6 - crash = Error -5: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
--lookup-gap 7 - crash = Error -5: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)

windows 7 x64
gpu driver 12.6
sdk 2.7

--thread-concurrency 1792  - work = 4.0Kh/s
--thread-concurrency 3584  - crash = Error -5: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)
--thread-concurrency 5376  - crash = Error -5: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)

Come on guys, if not you no one can't help, give ideas    

Added the --shaders option now

I assume you read my long post about intensity, maximum buffer size, valid shares, trampled memory, thread concurrency and so on? I mined for half hour on coinotron and it returned valid shares for that half hour and coinotron reported back the same rate I was hashing at.

cgminer with Nvidia GF 560 OC (--scrypt --lookup-gap 2 --thread-concurrency 8192 -w 256 -g 1 -I 20) say
 [2012-07-23 21:48:33] Maximum buffer memory device 0 supports says 268353536, your scrypt settings come to 536870912
but continues work

but with ATI 6930 and 6870 (--scrypt -I 10 -w 256 --lookup-gap 2 --thread-concurrency 4096 -g 2) with the same message
 [2012-07-23 21:58:43] Maximum buffer memory device 0 supports says 134217728, your scrypt settings come to 268435456
says the following
 [2012-07-23 21:58:43] Error -61: clCreateBuffer (padbuffer8), decrease CT or increase LG
 [2012-07-23 21:58:43] Failed to init GPU thread 0, disabling device 0

tested on coinotron works fine now

Note that you WILL get better hashrates from using cgminer because of massively improved behaviour with respect to getting work, submitting shares and managing longpolls. So no, I don't believe the results are equivalent overall.

I'm receiving reports that cgminer doesn't work fine with Coinotron. I checked it out myself and indeed there seems to be some kind of incompatibility. I'm wondering what could be source of the issue. Does cgminer support getworks with lower than base share targets ? Does it support LP messages from different port than mining port?

Below is command to start cgminer and 4 min long log. I'm using geforce 560ti . Its hashrate is 75KH/s according to reaper. Cgminer says 7.9 Kh/s. And during 4 minutes pool didn't receive single share.

cgminer --scrypt --url coinotron.com:9322 --lookup-gap 2  --thread-concurrency 6144 --userpass xxx:xxx


--------------------------------------------------------------------------------
 (5s):7.9 (avg):7.8 Kh/s | Q:12  A:0  R:0  HW:0  E:0%  U:0.0/m
 TQ: 1  ST: 1  SS: 0  DW: 2  NB: 2  LW: 0  GF: 0  RF: 0
 Connected to http://coinotron.com:9322 with LP as user
 Block: c821b82a7c18e903d6653132c62663d7...  Started: [18:39:32]
--------------------------------------------------------------------------------
 [P]ool management [G]PU management ettings [D]isplay options [Q]uit
 GPU 0:   7.9/  7.8Kh/s | A:0 R:0 HW:0 U:0.00/m I:-10
--------------------------------------------------------------------------------

 [2012-07-23 18:35:22] Started cgminer 2.5.0
 [2012-07-23 18:35:22] Probing for an alive pool
 [2012-07-23 18:35:23] Long-polling activated for http://coinotron.com:8344
 [2012-07-23 18:35:23] Pool 0 http://coinotron.com:9322 alive
 [2012-07-23 18:35:23] Disabling extra threads due to dynamic mode.
 [2012-07-23 18:35:23] Tune dynamic intensity with --gpu-dyninterval
 [2012-07-23 18:35:25] Thread 1 being disabled
 [2012-07-23 18:39:32] LONGPOLL from pool 0 detected new block
 [2012-07-23 18:41:13] New block detected on network before longpoll
 [2012-07-23 18:41:54] New block detected on network before longpoll

sorry to ask, i cant able to correctly find I & concurrency for 5870
can anyone help me?

Черевато ! При подаче сетевого питания блоки ИМЕЮТ РАЗНОЕ ВРЕМЯ запуска НЕ ЗАВИСИМО ОТ РЕЛИГИИ И СТРАНЫ ПРОИСХОЖДЕНИЯ !

Если кто знает как сделать чтобы CGMiner увидел BFL Singel помогите!
А то купил, а что-то у меня не получается ))) лузер блин))
Даже ветку с вопросом написал  https://bitcointalk.org/index.php?topic=94651.0
Спасибо!