My PC configuration: Processor: i7 4790k Motherboard: asus maximus vii hero Ram: g skill trident x 2400 16gb PSU: Thermaltake 530w smart I want to buy "gigabyte gtx 970 g1 ". now i want to know that can PSU handle this GPU at this PC config.?! or need to change PSU ? caz at this moment i don't have enough money to buy 2 of this. !