One other caveat with unlocking chips - Even if the chip unlocks you may still have a core that doesn't work (5 cores only) or if it does unlock fully to 6 cores, is not fully stable across all 6 of them.
Have a 960T that although it does unlock fully to 6 cores one of them is wonky at times so it has to be defective in some way.
The 1055T is the chip to get if needing 6 cores between the two chips mentioned.
Good thing about a 960T though is the unlock success rate is above 50%, more like 70% to get at least one extra core going.
The chance of any random 960T to unlock cores isn't bad but getting them unlocked and then what gets unlocked being useable or not is another thing.