re wrong ram in duo here is the macweek article describing the duo ram situation w o permission i hope that is ok jose bad ram brings some duos down random access memory boards for apple macintosh powerbook duos macweek v n feb copyright coastal associates publishing l p by raines cohen austin texas some third party memory expansion cards for powerbook duos depart from apple specs in ways that could cause crashes data loss and other problems technology works inc a ram and network vendor based here last week issued a warning about three problems it said it had found in duo ram products from some competing vendors which it declined to identify other vendors and an apple spokeswoman confirmed that the problems exist self refresh the duos require a kind of dynamic ram called selfrefreshing which can recharge itself while the system sleeps but technology works said some vendors have sold duo cards with nonselfrefreshing dram which can cause the system to lose data or fail to wake from sleep most leading memory manufacturers include the letter v in the part number stamped on their self refreshing chips nonself refreshing chips instead have an l according to techworks the chip label however may not tell the whole story newer technology of wichita kan said it uses nonself refreshing chips but adds its own circuitry to keep them refreshed while the duo sleeps speed some ram card vendors have put nanosecond dram on duo cards rather than the nanosecond type the requires technology works said however some chips labeled as or nanosecond are certified by the manufacturer to run at a higher speed kingston technology corp of fountain valley calif said it offers duo ram cards with nanosecond chips but only for the duo which is compatible with the slower chips space technology works charged and apple officials confirmed that some third party cards are too large to fit properly forcing the corner of the duo keyboard up and preventing the system from starting up normally when in a duo dock lifetime memory products inc of huntington beach calif said it originally shipped cards with this problem but has since offered all customers free upgrades to cards that fit
