Sapphire HD 7970 3GB – 489 h/s

Monero
Scratchpad: 2MB
"gpu_threads_conf" : [
 // gpu: Tahiti memory:2260
 // compute units: 16
 { "index" : 0,
 "intensity" : 720, "worksize" : 8,
 "affine_to_cpu" : true, "strided_index" : true
 },

SAPPHIRE HD 7970 3GB OC – 440 h/s

Monero
Scratchpad: 2MB
"gpu_threads_conf" : [

// gpu: Tahiti memory:2265

//compute units: 32
 { "index" : 0, "intensity" : 1000, "worksize" : 4, "affine_to_cpu" : false, "strided_index": false },
 ],

I own a 7970 DualX as advertised HERE

it runs with stock radeon-drivers, stock clock, no oc and parallel cpu-mining (amd a8) on constant 440H/s +/- 2% with my posted config