By mid-1995, the burgeoning Power Macintosh line had all but completely supplanted every prior Macintosh line, with only the high-end Quadra 950 and two low-cost education models (the all-in-one Macintosh LC 580 and desktop LC 630) remaining in production. The competitive marketplace for "accelerator cards" that had existed for earlier Macintosh systems largely disappeared due to the comparatively low price of Apple's Macintosh Processor Upgrade Card (US$600). DayStar Digital sold upgrade cards for the IIci and various Quadra models, and full motherboard replacements were available from Apple as well. Macintosh clones from companies like DayStar Digital and Power Computing were also coming to the market at this time, undercutting Apple's prices.