ASUS RADEON R9 280X TOP
Just over a month ago I purchased two ASUS Radeon R9 280X TOP (R9280X-DC2T-3GD5) graphics cards for mining the cryptocurrency called litecoin. Having played around with various settings I have found the most efficient mining setup using cgminer to be:

./cgminer --scrypt -o euro2.coinhuntr.com:3333 -u USER.NAME -p PASSWORD -d 0 --remove-disabled -I 13 -g 2 -w 256 --auto-fan --gpu-fan 10-100 --temp-cutoff 90 --temp-overheat 85 --temp-target 82 --gpu-memclock 1800 --gpu-engine 1100 --gpu-powertune 0 --thread-concurrency 8192

This gave ma hashrate of about 740 ± 15 khash/s

A few things I learnt along the way:

— You’ll want to use cgminer version 3.7.2 and not anything newer (this is so the graphic cards are supported).
— If you are using more than 1 graphics card, then instead of -d 0 use -d 0,1 (here 0 and 1 are the graphic cards).
— Don’t connect the cards via crossfire. It will only make it slower, not faster.

Let me know if you have any questions in the comments section below.

If you’d like to make my day by donating the tiniest fraction:
LTC: LPB8xzuo7eSHbKACHpuCLaVp3AwE53VtCi
BTC: 1GKxfaK5LhdEkk6fpsJRC6FTv6LgAzS2WE

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