gpu mining with sapphire 7950 dual x shutdown problem

[kashifrazzaq20]

i am facing shutdown problem sapphire 7950 dual x
i am using this script in cgminer
cgminer --scrypt -o stratum+tcp://pool.com:3322 -u user.worker -p x --intensity 13
it work fine but giving me just 250 kh/s to get high kh/s i have to change intensity 13 above but when i try 14,15,16,17,18,19 my computer direct shutdown and screen blank..

please help me..

[XPM-guru]

Have you ruled out bad psu?

[kashifrazzaq20]

cpu is good

OS Name   Microsoft Windows 7 Ultimate
Version   6.1.7601 Service Pack 1 Build 7601
Other OS Description    Not Available
OS Manufacturer   Microsoft Corporation
System Manufacturer   Hewlett-Packard
this is my system
System Model   HP xw9400 Workstation
System Type   X86-based PC
Processor   Dual-Core AMD Opteron(tm) Processor 2218, 2600 Mhz, 2 Core(s), 2 Logical Processor(s)
Processor   Dual-Core AMD Opteron(tm) Processor 2218, 2600 Mhz, 2 Core(s), 2 Logical Processor(s)
BIOS Version/Date   Hewlett-Packard 786D6 v02.07, 12/8/2006
SMBIOS Version   2.5
Windows Directory   C:\Windows
System Directory   C:\Windows\system32
Boot Device   \Device\HarddiskVolume2
Locale   United States
Hardware Abstraction Layer   Version = "6.1.7601.17514"
Installed Physical Memory (RAM)   4.00 GB
Total Physical Memory   3.50 GB
Available Physical Memory   2.23 GB
Total Virtual Memory   7.00 GB
Available Virtual Memory   4.00 GB
Page File Space   3.50 GB

[Equate]

what is the wattage of your PSU and is this the first time you are facing this problem ? Hash rate is low for your card.

[BitRock]

i am facing shutdown problem sapphire 7950 dual x
i am using this script in cgminer
cgminer --scrypt -o stratum+tcp://pool.com:3322 -u user.worker -p x --intensity 13
it work fine but giving me just 250 kh/s to get high kh/s i have to change intensity 13 above but when i try 14,15,16,17,18,19 my computer direct shutdown and screen blank..

please help me..

put this before "cgminer --scrypt -o stratum+tcp://pool.com:3322 -u user.worker -p x --intensity 14" in your  bat file

setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1

[kashifrazzaq20]

bro still same problem

[kashifrazzaq20]

what is the wattage of your PSU and is this the first time you are facing this problem ? Hash rate is low for your card.

my psu is 800W yes first time..the hash rate of this card is about 650 kh/s but  i just recived 290 kh/s