Samsung this week announced that it is already providing graphics card makers with samples of GDDR 4 memory chips. According to the company, the 256 Mb parts transfer data at up to 2.5 Gbps and will soon reach 2.8 Gbps. New technologies called Data Bus Inversion (DBI) and Multi-Preamble helped eliminate data transmission delay. Mass production is expected do begin in the second quarter of 2006 with high-performance graphics cards picking up in the second half.