avimanyu786 :
According to this site, if this is the one you are using, then your PSU has multiple +12V rails:
http://v2.21stmalldemoshop.de/Shop/EN/Product/Details/3436/906444/inter-tech-combat-power-cpm-750w-power-supply-internal-
You can calculate the maximum amperage yourself if you know the maximum available power for your PSU:
Check this guide:
http://www.overclock.net/t/131388/how-to-calculate-the-max-amperage-on-psus-with-multiple-12v-rails
Thanks for your help, I calculated for my PSU and I have 54amps, so the GPU is compatible with my PSU.
@byogamingpc Yeah, this is the GPU I want to buy.