Quote from: aistto on November 26, 2016, 09:08:20 PM

Quote from: lexele on November 26, 2016, 08:45:34 PM

Quote from: antantti on November 26, 2016, 08:38:33 PM

Quote from: RedRockMining on November 26, 2016, 08:27:51 PM

Ok, so it looks like everyone else is getting approximately the same hashrate difference for R9 390 vs. RX 480. I get 260 H/s and 190 H/s respectively with mine (both 8 GB). So my question is, is it expected that the 480 hashrate is only 73% of the 390? Is it because of the lower power consumption on the 480? With every other miner/currency so far, my 480s hash at about the same rate as my 390s. Is this something new with v8.0?

No it is not. It is because 290/ 390(x) are high end cards vs 470 low-mid/ 480 mid level, amd has not released that high performance gpu yet.

470/ 480 owners were lucky to enjoy hig end hashing rates at one algo with some bios modding. Today ancient 290 hashes more than 470/ 480 with the same or better hash/ watt ratio, better get used to it.

ps. what where those every other currencies where 480 matched 390?

While R9 serie has better hash, I don't quite agree about the hash/watt ratio. My RX 470 has better hash ratio than my 290x and the R9 is undervolted, not the the RX.

it depend on chance

390*6 1600 h/s 1030/1500 -60mv 1480W(gold psu) from wall (with -100mv 1300W)
480*5 1000 h/s 1288/2100 (mod bios 1750 straps) -60mv 850W(platinum) from wall
actually 390 works at -100mv, but to compare with RX480 I set Vcore to -60mv)

1480/1600 = 0.925 w/h (or 1300/1600=0.8125)
850/1000 = 0.825 w/h

so 390 better)

I can get 295 s/s out of 390 without bios mod but there is no reason to push it to the limits when you can do 240 with -50% on power consumption.