Litecoin Mining Rig

litecoinSo I recently built a Litecoin miner. If you haven’t heard of Litecoin, it is basically a new cryptocurrency that branched off of Bitcoin. This rig is based off of the standard 4x Sapphire Radeon 7950 setup. Each card is pulling 600 khash/s, totalling about 2.4 mhash/s altogether.  I’m using two PCIe x1 to PCIe x16 adapters and two powered PCI-e x16 adapters. The open air case was built from aluminum angles. The machine runs Xubuntu Linux and pulls about 1200 watts consistently.

The config file for cgminer:

"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"lookup-gap" : "2",
"thread-concurrency" : "21712",
"shaders" : "1792",
 
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
 
"gpu-threads" : "1",
"gpu-engine" : "1025",
"gpu-memclock" : "1550",
"gpu-powertune" : "20",
"gpu-vddc" : "1.100",
"temp-cutoff" : "99",
"temp-overheat" : "95",
"temp-target" : "80",
"gpu-fan" : "70-100",
 
"log" : "5",
"queue" : "1",
"scan-time" : "60",
"temp-hysteresis" : "3",
 
"api-port" : "4028",
"expiry" : "120",
"failover-only" : true,
"gpu-threads" : "1",
 
"no-pool-disable" : true,
"scrypt" : true,
"shares" : "0",
"kernel" : "scrypt",
"kernel-path" : "/usr/local/bin"

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