MojoKid writes: In all of its iterations, NVIDIA's Maxwell architecture has proven to be a good performing, power-efficient GPU thus far. At the high-end of the product stack is where some of the most interesting products reside, however. When NVIDIA launches a new high-end GPU, cards based on the company's reference design trickle out first, and then board partners follow up with custom solutions packing unique cooling hardware, higher clocks, and sometimes additional features. With the GeForce GTX 970 and GTX 980, NVIDIA's board partners were ready with custom solutions very quickly. These three custom GeForce cards, from enthusiast favorites EVGA, MSI, and Zotac represent optimization at the high-end of Maxwell. Two of the cards are GTX 980s: the MSI GTX 980 Gaming 4G and the Zotac GeForce GTX 980 AMP! Omgea, the third is a GTX 970 from EVGA, their GeForce GTX 970 FTW with ACX 2.0. Besides their crazy long names, all of these cards are custom solutions, that ship overclocked from the manufacturer. In testing, NVIDIA's GeForce GTX 980 was the fastest, single-GPU available. The custom, factory overclocked MSI and Zotac cards cemented that fact. Overall, thanks to a higher default GPU-clock, the MSI GTX 980 Gaming 4G was the best performing card. EVGA's GeForce GTX 970 FTW was also relatively strong, despite its alleged memory bug. Although, as expected, it couldn't quite catch the higher-end GeForce GTX 980s, but occasionally outpaced the AMD's top-end Radeon R9 290X.