Just look at the power consumption metrics in the review. If it used less power, it produced less heat. Nearly all the power that's used is directly converted t

Just look at the power consumption metrics in the review. If it used less power, it produced less heat. Nearly all the power that's used is directly converted to heat. TDP doesn't mean anything about what the CPU will produce under actual loads, it's the budget that the OEM should provide to satisfy the performance target of the CPU. Simple example of this is the 51W TDP Intel chips consistently used more power (and thus produced more heat) than the 65W TDP Intel chip. The reason is Intel is OK with the 51W TDP chips thermal-throttling more than they are the 65W TDP part, because that's the performance they are selling. Under full load the Ryzen 3 1200 was power-competitive with the Intel offerings, whereas the Ryzen 3 1300X and Ryzen 5 1500X used 20w more power. 20W is not going to be that noticeable, though.