is it normal that WU less than kh/s on 290 non x? I got 420 kh/s and WU 319 m/s.
is it normal that WU less than kh/s on 270x? I got 186 kh/s and WU 140-150 m/s.
Try reduce the Intensity? I guess your 290 non X is -I 21. Try -I 20.
the typical and classic max is 18 some *newer cgminer mod versions use a RAW method combined with a max of 13.
so i don't think 20 or 21 or higher would be valid and it would default to some other value.. i'm guessing
for example vertminer 0.5.2 max is 18
for example vertminer 0.5.3 max is 13
edit:
i read the readme and i guess i'm wrong on that 20 may be the
old maximum not 18.. oops
this is from the SCRYPT_README file..
--intensity XX (-I XX)
Just like in bitcoin mining, scrypt mining takes an intensity, however the
scale goes from 0 to 20 to mimic the "Aggression" used in mtrlt's reaper. The
reason this is crucial is that too high an intensity can actually be
disastrous with scrypt because it CAN run out of ram. High intensities
start writing over the same ram and it is highly dependent on the GPU, but they
can start actually DECREASING your hashrate, or even worse, start producing
garbage with HW errors skyrocketing. Note that if you do NOT specify an
intensity, cgminer uses dynamic mode which is designed to minimise the harm
to a running desktop and performance WILL be poor. The lower limit to intensity
with scrypt is usually 8 and cgminer will prevent it going too low.
SUMMARY: Setting this for reasonable hashrates is mandatory.