Quote from: charles2k on June 16, 2016, 08:44:46 PM

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Quote from: Sindren on February 25, 2016, 06:35:19 PM

Can I ask for best settings for r9 280x - 1200/6700mhz? thanx.

1100/1500 works best on my R9 280x - Gigabyte Windforce 3GB models.

higher memory clock = quickly SLOWER mining, higher core doesn't give any better hashrate, lower clocks are a slower taperoff on hashrate.

Other cards may vary, especially other models or other manufacturer cards.

For the 280x, it has 256 memory bus, so it is better to raise the memory frequency. For the 390, 1250 MHz is fast enough.

R9 280x has 384bit memory bus

You are right. Even though the 280x has 384 bit memory bus, it is slower than the 380x now due to the big DAG.