R9 270 Rocket League benchmark with Intel Core i7-3770K @ 3.50GHz at Ultra Quality: 1080p, 1440p, Ultrawide, 4K Performance Benchmarks - GPUCheck United States / USA
AMD Radeon R9 270 review (Page 9)
ASUS R9 270X DirectCU II TOP Specs | TechPowerUp GPU Database
MSI Radeon R9 270 Gaming OC and Sapphire Dual-X R9 270 OC Video Card Review - Page 9 of 14 - Legit Reviews