HIS RADEON HD 5870 REVIEW BY ULTIMATE HARDWARE - "HIS Radeon HD 5870 review also featuring the Zotac GeForce GTX 480. The HIS Radeon HD 5870 uses the RV850 GPU running at 850Mhz with 1GB Gddr5 Memory at 4800Mhz with 1600 Shader Processors with DX11"