Samsung Electronics retained its hold on the top spot, the market researcher said, while the overall market rose 20 percent globally.
To wrest the second position from Micron, Hynix improved its share from 16.5 percent to 17.1 percent. Micron's share, on the other hand, slipped to 15.3 percent, from 18 percent last quarter.
"Hynix's strong presence in the legacy and graphics DRAM segments, which had strong pricing, enabled it to outgrow its rivals," Andrew Norwood, principal analyst with Gartner, said in a statement.
Warning bells are already sounding for memory chip vendors, however. Whilehave helped companies book better profits so far in 2004, the industry is seen heading into a recession during 2005.
Meanwhile, DRAM vendors are increasing their capital expenditures on new production facilities. These will come online in late 2005 and through 2006, triggering an oversupply-driven downturn, Norwood said.