hemantrtk980 :
okay thank you.
as you said models, what about 240mm AIO's?
and why corsair AIO's are costly?
240mm cool better than 120's (cause larger radiator space means better cooling power.)
same for 280mm (same reason. larger rads)
before buying you'd wanna make sure your case supports the one you want (smaller cases may support 120mm but 240 or 280 may be too large)
Corsair is a premium Brand in PC industry. Long history and good record for quality. (doesnt mean they are always the best ofc but also not worst) They are known to have a more costly product in most thigns be it mice, cases, etc.
Most games or builders can instantly know the brand by the Corsair Icon because of its popularity.