I wish that was true but negative.  7 hours last night, the rig beat me.

--This one gets the too high tc error 61, if I change tc to 8192 it will hash at around 450.
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer.exe --scrypt -o stratum+tcp://east1.us.stratum.dedicatedpool.com:3346 -u xxxxx -p xxxxxx --lookup-gap 2 --thread-concurrency 8193 -g 1 -I 13 -w 256 --auto-fan --gpu-fan 30-90 --temp-cutoff 98 --temp-overheat 90 --temp-target 82 --gpu-powertune 20 --gpu-memclock 1250 --gpu-engine 947 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale

-- This one HW's like crazy (8192, -i 14)
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer.exe --scrypt -o stratum+tcp://east1.us.stratum.dedicatedpool.com:3346 -u xxxxx -p xxxxxx --lookup-gap 2 --thread-concurrency 8192 -g 1 -I 14 -w 256 --auto-fan --gpu-fan 30-90 --temp-cutoff 98 --temp-overheat 90 --temp-target 82 --gpu-powertune 20 --gpu-memclock 1250 --gpu-engine 947 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale