Quote from: a7med918 on January 19, 2017, 11:09:08 AM

Quote from: Astennu on January 19, 2017, 10:42:39 AM

Quote from: a7med918 on January 19, 2017, 07:31:16 AM

Dear all
i have some 290x cards i am looking for best C/memory setting to give max hashrate in zec

i try 1050/1450 and result is 330h/s in some cards but do nothing in r9 290x gigabyte windforce - max is still 277h/s

also i have some 280x - 285x - 380x nitro cards i want to know also the best setting for it

i use win7,,8, and 10 in different rigs with 16.9.2 - 16.8.2 drivers v11.1 claymore

could be a difference in memory. I think the 330 card is a Hynix card and the others might be Elpida.
To get more out of them you can do Stilt timing / memory strap mods to the cards. You will have to do a setting in the motherboard BIOS to get the cards working since the vga bios is edited. But it works fine.

There is no ideal clockspeeds for max hash. as long as your memory timings are low. Higher clocks are better. If you go to high memory will give errors ECC will correct it but you will be slower then. Higher clock = more power usage if you pay for power you might lose money istead of making money. Thats why most people undervolt cards and somtimes underclock them a bit for better efficiency.

For 280X also timing mods! -asm 1 helps a lot but without timings are key. with stilt timings you can get 235-240 with hynix memory. And with ASM you get 270 (that was with 1000-1375) if you go for higher clocks 300 is possible.

thanks for your reply you can say that electricity is almost near to free and i only want to adjust clock / memory setting

Every card is different. One will do 1100-1450 a second 280x will doe 1150-1500. another one will do 1200-1425. So if you want the max performance you have to tweak every card individually and find its limit.