Could you please post optimal configuration for this card?
./yacminer --scrypt-chacha -o stratum+tcp://193.136.97.30:3032 -O username:password -w 128 -g 1 --lookup-gap 11 -R 1280 --buffer-size 3776 --gpu-engine 680-1080 --gpu-memclock 1000
I think settings for Windows are going to be a little bit different. ThirtyBird can weigh in on that.
However if someone holds enough currency and has enough hash power he can produce alternate branch with higher trust even after upgrade.
As it should be... There needs to be some coordination to gain control of the network when upgrading. Large amounts of hashes might be too much to risk now, but for a brief time when upgrading, we will need 'all hands on deck'.