Press Releases GDDR4 BOOSTS SAPPHIRE HD 4670 PERFORMANCE Jan 20th, 2009-The new SAPPHIRE HD 4670 GDDR4 has been production engineered by SAPPHIRE to bring new levels of performance to the mainstream previously associated only with high end cards. With its 320 stream processors and carrying 512MB of GDDR4 memory the SAPPHIRE HD 4670 GDDR4 is now the best product in its class. ...read full press release