EDIT: I am using Asus R9 280x DC2 TOP version 1, I am getting around 780kh/s for each card.
May I ask your cgminer configuration, please?
+1
780kh/s seems very high
780 surely sounds kinda high. Could you share your configuration please and also show us maybe a screenshot of your miner? Not trying to bash, just wanted to see since I was planning on buying a few of those myself, but am still looking around at others. This would give me a 100% confirmation to choose those if one can still find them.
i had hard time doing research on which card to choose. At first i was aiming for r9 280x Toxic as a lot of people claims that they can reach 800kh/s however they have insane temps and i think price is a bit higher in my country. Then i found a thread and many were saying that the r9 280x DC2T of ASUS have high hash rates as well and they have much better cooling system. I'm not really sure if the version 2 is any better than version 1 but base on the info that i have gathered, v1 has a memory of 6400Mhz higher that the 6000Mhz of v2. v2 is also a bit cheaper and it covers 3 slots on the mobo. My fans are running 80% to 100% 24/7 and the noise is very acceptable. It's more quiet than the powercolor hd7950 and sapphire 7950 cards that i have when running at full fan speed.