it may support 980 (as it is same as 955 but clocked higher, both are daneb chips)
it will not support 960t as it is zosma chip and your board does not support zosma or thuban chip.
Higher clock speed cpu use higher Wattage. Your board supports upto 125w cpu
Use new stepping cpu (c3 stepping) as they use less power and overclock higher than older one.