Ques. I would like to use Iball cabinet with corsair 450W SMPS. Is it ok?
Ans . Although the cabinets come with a built in power supply but you can still swap the stock supply with the corsair 450w it would be completely fine.
Instead of getting and swapping a power supply, you can also look at getting a gaming cabinet from iball, which can satisfy all your power hungry graphics card's power requirements.
Take a look here (the prices mentioned on the company website are quite high, market prices are comparatively lower than this http://www.iball.co.in/Category/GAMING-CABINETS/59