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Ahojte,
Dnes som si kupil 4 GB Ram DDR2 800 MHz do mojho MacBook white late 2007. Nemilo ma ale moj milašek prekvapil. Odmieta s nimi fungovat… zistil som, ze problem je v tom, ze idu na 800 MHz.
Ked tam dam obidva moduly, tak sa laptop vobec nespusti, nezaznie ziadny ton… nic. Len kontrolka svieti.
Ked tam dam iba jeden modul, tak je to rovnake.
Ked skombinujem jednu novu 800 MHz s jednou starou 667 MHz, tak Mac v pohode nabehne. Ramky sa nacita plna hodnota 2,5 GB. Cize sa obidva moduly prisposobia rychlosti toho pomalsieho.Neviete mi povedat, preco to nechce brat 800 MHz moduly, ked su oficialne podporovane? Neda sa to nejako ojebabrat?
Firmware macbooku mam najnovsi.
Ramky su urcite v poriadku… mam dve balenia po dvoch kusoch a skusal som vsetky.Co si o tom myslite?
Takze som uz aj nasiel odpoved. Sice to nedava zmysel, ale ked chceme pouzivat MAC, tak sa musime zmierit s tym, ze tam k….va nic standardne nepasuje. Druhy MAC do ktoreho som dokupoval ramku podla oficialnych parametrov a zasa to nesedi.
Macs with 667 pre-fitted in them will refuse to boot with 800 MHz ram.
It’s due to the spd in the ram modules. (It boots only if one is 667)
There is a speed table that can only carry 3 different speeds (JDEC ddr2 offical spec), so let me explain:The 667 module has 400 – 533 and 667 programmed in it.
But the 800 module has 400 – 533 – 800, so when the macbook checks for the 667 speed and doesnt find it, it wont boot.
That cannot be right either – I spent yesterday checking some 2GB PC6400 ram modules. I was using a MacBook 2,1 (2GHz Core 2 originally fitted with PC5300 ram). The MacBook booted fine with a single PC6400 module (800MHz) and the memory tested fine and System Profiler reported it as 667MHz DDR2……
The MacBook 3,1 and 4,1 models (late 2007 to 2008) won’t boot with a single PC6400 chip in them but the MacBook 5,2 (nVidea white non-unibody) will.
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