My System seems to have spikes

[Snoz]

My system while mining seems good (high 800's Kh/s) except that about every 30 seconds the screen flashes and I notice that my core clock and memory clock drops from 920/1500 to 300/150, I took screen shots of the spikes while mining and also when it does spike.

Could anyone please take a look and help me problem solve this?, I have not tried changing the voltage.

http://gpuz.techpowerup.com/14/02/14/g5c.png



http://gpuz.techpowerup.com/14/02/14/2nh.png

My system is:
Gigabyte X58a-UD3R Bios version FH
Intel Core i7 Extreme 980X CPU
12 gig Corsair XM3 DDR3 memory
Asus DirectCU II OC video card
Themaltake Toughpower Gold 750w PSU

My Cgminer.conf is .

Code:

,
"api-listen" : true,
"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "32765",
"shaders" : "2816",
"gpu-engine" : "920",
"gpu-fan" : "40-100",
"gpu-memclock" : "1500",
"gpu-memdiff" : "0",
"gpu-powertune" : "20",
"gpu-vddc" : "0.000",
"temp-cutoff" : "90",
"temp-overheat" : "90",
"temp-target" : "80",
"api-port" : "4028",
"auto-fan" : true,
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "60",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"sharethreads" : "32",
"kernel-path" : "/usr/local/bin"
}

Cheers,

Snoz

[ineedit]

Make sure you have disabled AMD Graphics OverDrive in the Performance Tab of the Catalyst Control Centre

[Snoz]

OK, I just checked and it is not selected.

Thanks for the reply.

Snoz

[ineedit]

OK, I just checked and it is not selected.

Thanks for the reply.

Snoz

Something you are running is trying to change the clocks, you have going to have to go through a process of elimination to get to the solution or use a different toolset/BIOS combination.

I had a similar situation with Gigabyte cards and the catalyst driver set that I could only cure by using MSI Afterburner and getting it to force a constant voltage. In the end I swapped the BIOS for one with a set voltage and removed the problem that way.

[Snoz]

Thanks for the info ineedit, I wouldn't of thought of that.
I'll follow your advice and see how it goes,

Cheers,

Snoz

OK, I just checked and it is not selected.

Thanks for the reply.

Snoz

Something you are running is trying to change the clocks, you have going to have to go through a process of elimination to get to the solution or use a different toolset/BIOS combination.

I had a similar situation with Gigabyte cards and the catalyst driver set that I could only cure by using MSI Afterburner and getting it to force a constant voltage. In the end I swapped the BIOS for one with a set voltage and removed the problem that way.