Is LCD2490WUXi2 without A-TW?

[cenz]

I found this link it list 2490i2 hasn't A-TW, just H-IPS, also found i2 is kind of green version from chinese review, does A-TW need huge power? it that true?

http://spreadsheets.google.com/pub?key=t1-4_xFuNTfZQ3QORl_GZjg&single=true&gid=0&output=html

chinese review (black level not so good)
http://product.pcpop.com/000172935/Features.html