Talk:PC133

Hi I tried to find information about single vs dual sided SDRAM it is a common problem that only 50% of the memory is recognised by the system if a Single sided memory stick is used in a system designed for double sided sticks. (I searched wikipedia for the finer details)

Compatability with PC100
Most PC133 memory modules are backward compatible with PC100 and some PC66 systems. Is there a specific reason that not all modules are backward compatible?


 * Because near the end of SDRAM production, as DDR took over the market, manufacturers of PC133 quit making it backward compatible with the slower PC100 and PC66 standards. I don't know specific reasons or technical details, but there must have been some extra cost involved with ensuring the modules would work at slower speeds. Or it could have been for no real technical reason at all but an added hack to deliberately make it not work to push sales of motherboards supporting PC133 to clear out inventories of older chipsets. Chipset and RAM manufacturers work very closely with each other to ensure compatibility of new RAM technology. I wouldn't put it past the industry to create an artificial incompatibility to clear their bins of older product. Bizzybody (talk)


 * Quality brand manufacturers usually kept PC-100 timing data in SPD EEPROM, some even down to PC-66. The cheap/unbranded modules usually had only PC-133 timings programmed. This should not prevent these modules from running at lower speedgrades though (except motherboard issues due to memory chip density or internal organization). --Denniss (talk) 12:39, 31 December 2012 (UTC)

Compatiblity
I think good info for this page wouldbe what motherboards etc this memory is commonly used with.

Final SDRAM
The article says: "PC133 was the fastest and final SDRAM standard ever approved by the JEDEC...". Isn't DDR RAM a type of SDRAM? (Double Data Rate SD RAM).
 * DDR is not the same as PC100, it's different voltage and size so we should not compare with them, only comparison between PC68, PC100, PC133 makes any sense. — Preceding unsigned comment added by 95.49.69.16 (talk) 08:23, 6 April 2014 (UTC)

Resolve Stub Status
Could we resolve the Stub status of PC100, PC133, PC2700, PC3200, etc by consolidating them into a single article? MaverickSolutions (talk) 01:46, 13 April 2009 (UTC)