GeForce 6800 Ultra Curie2004 256 MB GDDR3 · 81 W NVIDIA GeForce 6800 Ultra 512 MB engineering-sample PCIe board
Radeon X800 PRO AGP R4002004 256 MB GDDR3 · 48 W Sapphire Radeon X800 PRO AGP board with exposed R420 GPU
GeForce FX 5950 Ultra Rankine2003 256 MB DDR · 74 W Museum-labeled GeForce FX 5950 Ultra engineering sample