So I got myself a Radeon R9 280x Asus DCII Top and was expecting
1. Hashrates along the lines up to 400 kh/s (seen other people reach 400 with either DCII or Sapphire toxic)
2. That the card would be voltage unlocked
The card did 250 kh/s out of the box and voltage seems to be locked. Not the greatest start.
When I clock it down to 1000/1500 from default 1070/1600 it reaches 358 kh/s... which is also my record kh/s for the card.
Tried tc 8191,8192,8193 and 11200. Tried a few intensity settings with no luck.
Tried gpuspeeds down to 950 and up to 1200 and shitloads of settings inbetween. No significant increases whatsoever, just decreases. Tried memclock up to 1850 and down to 1250 only to settle at 1470.
OH, did I mention the card has hynix H5GQ2H24AFR memory modules, which means "the stilts" optimized bios is not going to help it either?
Voltage? I flashed a custom bios which would allow me to lower the voltage. Did nothing but freeze the card for me so I had to revert it. My gigabyte cards were also locked but I just flashed a custom bios and set the voltage to 1.1 in the config. Same thing did NOT work with the asus card.
Quite disappointed to say the least. Many people mention this card and the sapphire toxic as the great 280 cards. My two other cards are Gigabytes, rev1 and they are fifty bucks cheaper and outperform it.
I realize different cards peak at different settings but I find it astonishing that a factory OC'ed card gains almost 50% more kh/s from getting downclocked to 1000/1500 from stock 1070/1600.
