I'm trying to mine Litecoin for fun on a Mac Pro 5,1 Mid 2012.
It has 2x2.4 GHz 6-Core Intel Xeon, 28 GB of RAM, and an ATI Radeon HD 5770 with 1GB of memory.
I would like to try some fine settings but I don't exactly which could be the maximum performances.
Currently if I use cpuminer it reaches 75 kH/s binding 24 thread on the 12 cores, while the GPU only touches 3-5 kH/s with cgminer or bfgminer.
Can it do more? Especially the GPU, but keeping its usage at a level for which it is still possible to use the machine for other tasks.
I tried to increase intensity: up to 9-10 I can't see any change in hashrate, above those values the machine freezes.
I tried modify thread-concurrency and shaders: setting TC to 3200 (4x shaders number) doesn't change the hashrate, while increasing it further I get a meaningless hashrate of the order of MH/s with a message which say I'm asking for more memory than my device can afford, and no shares are found.
I'm curious about what the GPU can actually do since I read in the Litecoin wiki -
https://litecoin.info/Mining_hardware_comparison - that my graphic card should reach a hashrate of about 180/200 kH/s. I wonder about what I have to set to achieve that.
Thanks
