Q: ÉAÉbÉvÉãÇÕç≈ãflÅAêVǵǢÉfÉÖÉAÉãÉvÉçÉZÉbÉTÇà Power Mac G4ÅiMirrored Drive DoorsÅjÇ 3 éÌófiÉäÉäÅ[ÉXǵNjǵÇΩÅB1.25GHz ÉÇÉfÉãÇΔ 1 GHz ÉÇÉfÉãÇÕçÇë¨ÇÃ167MHz SDRAM ÉoÉXÇìãç⁄ǵǃǮÇËÅADDR333 SDRAM ÇÉTÉ|Å[ÉgǵǃǢNjÇ∑Ç™ÅA867MHz Power Mac G4 ÉÇÉfÉãÇÕ DDR266 SDRAM ÇégópÇ∑ÇÈ 133MHz SDRAM ÉoÉXÇìãç⁄ǵǃǢNjÇ∑ÅB867MHz ÉfÉÖÉAÉãÉvÉçÉZÉbÉTÇà PowerMac G4 Ç…ìãç⁄Ç≥ÇÍǃǢÇÈ DDR266 SDRAM ÇÅADDR333 ÇÃǛDžëŒâûǵÇΩ SDRAM ÇΔåä∑Ç∑ÇÈDZÇΔÇÕâ¬î\Ç≈Ç∑Ç©ÅH

A: 867MHz ÉÇÉfÉãÇà Power Mac G4ÅiMirrored Drive DoorsÅjÇÕÅARAM ÉoÉXë¨ìxÇ™ 133MHz Ç≈Ç∑ÅBDZÇÃÉÇÉfÉãÇà PowerMac ÇÃêVã@î\Çà 1 ǬDžÅADDRÅiDouble Data RateÅjÇà SDRAM ÇégópÇ∑ÇÈÇΔǢǧã@î\ǙdžÇËÇ‹Ç∑ÅB

DZÇÃÉÇÉfÉãÇà PowerMac ÇÃç≈í·ë¨ìxÇà DDR ÇÕÅA2x133ÅAǬNjÇË DDR 266ÅiǬNjÇË PC2100ÅjÇ…Ç»ÇËÇ‹Ç∑ÅB

É}ÉVÉìé©ëÃÇÕÅADDR 333ÅiǬNjÇË PC2700ÅjǻǫÅAÇÊÇËçÇë¨Çà DDR SDRAM ÇégópÇ≈Ç´Ç‹Ç∑Ç™ÅARAM ÉoÉXÇ™ 133MHz ÇÃÇ‹Ç‹Ç≈džÇÈÇΩÇflÅAí·ë¨Çà DDR 266 ÇÊÇËLJèüÇÈÇΔǢǧDZÇΔÇÕdžÇËÇ‹ÇπÇÒÅB

Ç‹ÇΩÅADDR 333 ÇΔ DDR 266 Çà DIMM ÇëgÇ›çáÇÌÇπÇÈDZÇΔé©ëÃDžLJñ‚ëËÇÕdžÇËÇ‹ÇπÇÒÇ™ÅA867MHz G4 ÇÃÉoÉXÇÕ 133MHz ÇÃÇ‹Ç‹Ç≈džÇÈÇΩÇflÅADDR 333 DDR SDRAM ÇÃìÆçÏÇÕÅADDR 266 ÇΔÇ‹Ç¡ÇΩÇ≠ïœÇÌÇËÇ‹ÇπÇÒÅB

Ç«ÇøÇÁÇÃèÍçáLJÅAJEDEC Standard No. 21 - C (Appendix D) Ç…è]ǧÇÊǧDžíçà”ǵǃÇ≠ÇæÇ≥Ç¢ÅBì¡Ç…ÅASerial Presence DetectÅiSPDÅjEEPROM Çê≥ǵÇ≠ÉvÉçÉOÉâÉÄǵǃǢÇÈDZÇΔÇämîFǵǃÇ≠ÇæÇ≥Ç¢ÅBSPD ÇÃëÊ 2 ÉoÉCÉgÇÕÅADDRÅiPC2700 / DDR333ÅjÇé¶Ç∑ 07Åi16êiêîÅjDžǻǡǃǮÇËÅAëÊ 9 ÉoÉCÉgÇÕÅA6ns Ç‹ÇΩÇÕǪÇÍà»â∫ÇÃÉNÉçÉbÉNÉTÉCÉNÉãÅi1/6nS = ñÒ 167MHzÅjÇé¶ÇµÇƒÇ¢ÇÈïKóvǙdžÇËÇ‹Ç∑ÅB

DDR Ç…ä÷ǵǃíçà”Ç∑Ç◊ǴDZÇΔǙLJǧ 1 ǬÇæÇØdžÇËÇ‹Ç∑ÅBCAS ÉåÉCÉeÉìÉVÇ 2.5 ÇÃÇÊǧDžéwíËÇ≈Ç´ÇÈÇÊǧDžǻǡÇΩÇÃÇ≈ÅAÉTÉ|Å[ÉgÇ∑ÇÈëS CAS ÉåÉCÉeÉìÉVÇΔîº CAS ÉåÉCÉeÉìÉVÇÅiëÊ 19 ÉoÉCÉgÇ…Åjñæé¶ìIÇ…éwíËǵǃÇ≠ÇæÇ≥Ç¢ÅBDZÇÃédólÇ…è]ǡǃ CAS ÉåÉCÉeÉìÉVÇí«â¡ÇµÇ»Ç©Ç¡ÇΩèÍçáÅADIMM Ç™îFéØÇ≥ÇÍǻǢDZÇΔǙdžÇËÇ‹Ç∑ÅB

[2002 îN 8 åé 19 ì˙]