Question: My laptop uses PC66 SDRAM SODIMM's, can I use PC100/PC133 SODIMM's?

Read our answer below:

This will depend on your laptop. With PC66 SDRAM based laptops things aren't as linear as with PC100 or PC133 laptops. The problem is that early PC66 SDRAM was 5V while PC100 and PC133 that followed in later years were all 3.3V. If your laptop dates back to the early production timeframe when PC66 SDRAM was only starting to appear in laptops then there is a very high chance it only supports 5V SDRAM. The notch on the SODIMM (the module or slot itself) determines whether it's 5V or 3.3V. Newer SDRAM based laptops use 3.3V SDRAM SODIMM's so it's both easy and possible to use PC133 SDRAM in a PC100 SDRAM based laptop.


Some PC66 SDRAM SODIMM's came as 3.3V, as a result some laptops used the 3.3V variant instead. If you own such a laptop then this is good news as in many cases you can simply use PC100 or PC133 SDRAM SODIMM's. The single aspect worth remembering is that the given PC100 or PC133 laptop memory module must contain PC66 information configured in its SPD chip for 100% successful operation.


Follow Method 1, Method 2 or Method 3 in part 5 of the Laptop Memory Upgrades Guide as this will help you determine what type SDRAM your laptop uses.


Would you be interested in viewing other technical laptop memory question topics and answers? If so simply click the button below and choose your desired topic by clicking its title.



Read the Laptop Memory Upgrades Guide to learn about all the aspects you should know when buying laptop memory...

...alternatively discover Where to buy 100% compatible SDRAM, DDR, DDR2 and DDR3 SODIMM memory.

PC3-10600 1333MHz DDR3 204-pin SODIMM's

Looking for PC3-10600 1333MHz DDR3 204-pin SODIMM's for your laptop? Select the memory upgrade you require below and buy without the hassle!


Need other laptop memory SODIMM's? Simply click a memory type below to view a full list of available SODIMM's...




Kingston laptop memoryCrucial laptop memoryCorsair laptop memoryOCZ Technology laptop memoryPNY laptop memoryHypertec laptop memory
laptop memory for HP laptopslaptop memory for Compaq laptopslaptop memory for Dell laptopslaptop memory for Acer laptopslaptop memory for Lenovo laptopslaptop memory for Toshiba laptopslaptop memory for Asus laptopslaptop memory for Fujitsu-Siemens laptopslaptop memory forFujitsu laptopslaptop memory for Sony laptopslaptop memory for Samsung laptopslaptop memory for Packard Bell laptopslaptop memory for Gateway laptopslaptop memory for Apple laptopslaptop memory for Advent laptopslaptop memory for Medion laptopslaptop memory for MSI laptopslaptop memory for Vobis laptopslaptop memory for Hi-Grade laptopslaptop memory for Alienware laptopslaptop memory for Voodoo laptops
Buy laptop memory at CrucialBuy laptop memory at OfftekBuy laptop memory at MyMemoryBuy laptop memory at NovatechBuy laptop memory at EbuyerBuy laptop memory at Micro DirectBuy laptop memory at DabsBuy laptop memory at SaverstoreBuy laptop memory at PC WorldBuy laptop memory at PC World BusinessBuy laptop memory at PIXmaniaBuy laptop memory at InsightBuy laptop memory at MaplinBuy laptop memory at OyyyBuy laptop memory at MiscoBuy laptop memory at BT Business DirectBuy laptop memory at BT ShopBuy laptop memory at PlayBuy laptop memory at KelkooBuy laptop memory at Zavvi
Copyright © 2009 - 2017 Laptop Memory Upgrades UK - All rights reserved.