Topic: One card low hash rate (Read 845 times)

About 1 1/2 coins.

I dun know, but your cards sure mine well o.O  How much LTC you maknig a day?

First post here. Tried to post to other crypto topic, but there's no post button. I've searched all over and cannot find a related post. I have three AMD 7970 GPU cards attached to MSI mother board with 8 gb of ram. Everything is brand new. I using scrypt to mine litecoin.

First two cards are running alright at 670, but the 3rd sucks at 80 kh/s. Why would this happen? I have amd 13.4 drivers installed I've tried 13.1 and 12.8 with same results. CGMiner 3.4.0.

GPU 0: 670 kh/s
GPU 1: 670 kh/s
GPU 2 80 kh/s

Any help in the right direction is appreciated. Please post your Litecoin address so I can pay for your working solution.

These are my settings and run with no hardware errors and zero rejects.

,
"intensity" : "13",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"thread-concurrency" : "8192",
"shaders" : "2048",
"gpu-engine" : "1023",
"gpu-fan" : "80-100",
"gpu-memclock" : "1750",
"gpu-memdiff" : "0",
"gpu-powertune" : "20",
"gpu-vddc" : "0.000",
"temp-cutoff" : "85",
"temp-overheat" : "85",
"temp-target" : "75",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "30",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"auto-fan":true,
"kernel-path" : "/usr/local/bin"
}