Comparison of Gainward GeForce GTX 1080 Phoenix video card vs ZOTAC GAMING GeForce GTX 1650 AMP video card by specifications and benchmarks. Gainward GeForce GTX 1080 Phoenix runs at 1.607 GHz base clock speed and has 8 GB of GDDR5X memory, while video card ZOTAC GAMING GeForce GTX 1650 AMP runs at 1.485 GHz base clock speed and has 4 GB of GDDR5 memory. The TDP of the first video card is 180 W, and the second is 75 W. Compare the table of benchmark results to find out which graphic card is better.