Comparison of MSI GeForce GTX 980 4GD5T OC video card vs Zotac GeForce GTX 980 AMP! Omega video card by specifications and benchmarks. MSI GeForce GTX 980 4GD5T OC runs at 1.178 GHz+ 5 % base clock speed and has 4 GB of GDDR5 memory, while video card Zotac GeForce GTX 980 AMP! Omega runs at 1.202 GHz+ 7 % base clock speed and has 4 GB of GDDR5 memory. The TDP of the first video card is 165 W, and the second is 165 W. Compare the table of benchmark results to find out which graphic card is better.