Re: [ANN] YACMiner - AMD GPU miner for Scrypt-Chacha, N-Scrypt, and Scrypt coins

Quote from: Queripel on March 24, 2014, 03:16:30 PM

I'm really struggling to get a decent YAC rate out of my three MSI R9 290 (4Gb) cards; the best I've managed so far without a load of hardware errors is a little over 5kH per card which seems too low to me!

I've tried to go through the tuning guide in the readme, have tried 2, 4, and 8 for lookup gap, but still can't do any better. Can anyone help please?

My "best" settings so far:

Code:

"device" : "0,1,2",
"rawintensity" : "7600",
"buffer-size" : "3600",
"lookup-gap" : "8",
"gpu-engine" : "1000",
"gpu-memclock" : "1250",
"gpu-threads" : "1",
"worksize" : "256",

"api-port" : "4028",
"expiry" : "20",
"failover-only" : true,
"no-submit-stale" : true,
"scrypt-chacha" : true,

"queue" : "0",
"scan-time" : "10"

Edit: I'm running Windows 7 64-bit with 8Gb of system RAM, using the above settings Task Manager shows 1419/8153 memory in use (so well over 6Gb of physical memory available)

Your settings look pretty close to me. YAC favor cards with lots of memory, and relative to how many threads you have (2560), 4GB is actually not much i the way of memory.

Your ideal settings (no HW errors) will be one of these (based on 3600 buffer-size)
LG   rI
6   5296
7   6227
8   7200
9   7680
10   8694
11   9804
12   10240

You may need to round down to the nearest multiplier of --worksize (Depending on your driver). Obviously, the more you can allocate with buffer size, the higher your rI can go