AMD Radeon HD 7990 's Advantages
Larger VRAM bandwidth (288.0GB/s vs 224.0GB/s)
512 additional rendering cores
AMD Radeon Pro 5500 XT 's Advantages
Released 7 years and 4 months late
Boost Clock has increased by 76% (1757MHz vs 1000MHz)
More VRAM (8GB vs 3GB)
Lower TDP (125W vs 375W)