GeForce GTX 1070 vs GeForce GTX 1660 specs and performance
In our benchmarks, the GeForce GTX 1070 beats the GeForce GTX 1660 in gaming performance.
Our database shows that the GeForce GTX 1660 has a slightly higher core clock speed. The core clock speed (or base speed) is the frequency at which the GPU core runs. This metric makes sense when comparing GPUs of a similar architecture or generation. In addition, the GeForce GTX 1660 also has a slightly higher boost clock speed: the maximum frequency the chip can reach if power delivery and thermals allow.
As stated by the manufacturer, the GeForce GTX 1070 has slightly more memory with 8 GiB of memory compared to 6 GiB. Memory size doesn't directly affect performance, but too little memory will certainly degrade gaming performance.
In addition, the GeForce GTX 1660 has a slightly lower TDP at 120 W when compared to the GeForce GTX 1070 at 150 W. Heat output doesn't match power consumption directly but, it's a good estimate.
According to the results of the hardwareDB benchmark utility, the GeForce GTX 1070 is faster than the GeForce GTX 1660.