Quote from: QuintLeo on June 07, 2016, 06:29:02 AM

Quote from: Koamder on May 30, 2016, 08:40:20 AM

Quote from: QuintLeo on May 29, 2016, 07:29:39 AM

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.

390 is pretty much a rebadged 290 with a bios update IIRC - my 290s seem happy at stock 1250 mem clock (I can't underclock the core OR the memory under LINUX due to limitations of ATICONFIG/drivers) and I've been a bit conservative on temps even with the bios upgrade to them from TheStilt so only clocking the cores at 1120 - this is good for right about 30 MH/s so I can't complain especially at the price I paid for them.

STOCK BIOS, they ran best at 1350 Mhs memory clock - apparently the memory timing updates done in The Stilt bios helped the memory throughput a LOT.

Do you also have the 390? I heard that the 390 is a bit more efficient than the 290 . But I am not sure.