AMD Radeon R9 270 1024SP 's Advantages
Released 1 years and 4 months late
Boost Clock925MHz
Lower TDP (150W vs 275W)
AMD Radeon R9 290 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (320.0GB/s vs 153.6GB/s)
1536 additional rendering cores