Taipei, May 5th, 2009 --- Sources indicate that the biggest DRAM spot market suppliers, Powerchip and Elpida, have stopped shipping chips to the spot market, resulting in tighter supply, says DRAMeXchange. Therefore, DDR2 1Gb spot prices have stayed strong at US$1.2. Meanwhile, marketers expect to see the prices move towards US$1.5 by end of June.