Mixing PC2100 (133Mhz) RAM and PC2100 (266MHz) RAM

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Daniel120201

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rojodogg

rojodogg

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Your MOBO supports º 2 x 184-pin DDR DIMM socket support DDR333/266 DDR SDRAM and
º 2 x 168-pin SDRAM DIMM socket support PC133/100 3.3V SDRAM
º Maximum: 2GB with 32bit if you are using 64 bit you can go up to 4GB.

(HIGH DENSITY 1GB PC2100 DDR266 PC2100 266MHZ Memory NON-ECC 184PIN RAM Desktop) can be used in the 2 184 pin slots because it is supported.
 
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rojodogg

rojodogg

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Your mother board (MOBO) supports 2 different types of RAM, 184 pin and 168 pin. That is why your board has 2 sets of colored Ram slots. It should be blue for 2 slots and black for the other 2 slots. Your manual or board should tell you which is which, I am assuming that the blue is the 184 pin and the black is the 168 pin.
 
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Daniel120201

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On the website it says that you can't use the SDRAM and DDR at the same time.
What is my 133Mhz (DDR) RAM chip then? SDRAM or DDR?
It said it was PC2100, should I just pull out my 512MB chip and not use that?
 
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rojodogg

rojodogg

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There is no architectural difference between DDR SDRAM designed for different clock frequencies, for example, PC-1600, designed to run at 100 MHz, and PC-2100, designed to run at 133 MHz. The number simply designates the data rate at which the chip is guaranteed to perform, hence DDR SDRAM is guaranteed to run at lower (underclocking) and can possibly run at higher (overclocking) clock rates than those for which it was made.[6]

DDR SDRAM modules for desktop computers, commonly called DIMMs, have 184 pins (as opposed to 168 pins on SDRAM, or 240 pins on DDR2 SDRAM), and can be differentiated from SDRAM DIMMs by the number of notches (DDR SDRAM has one, SDRAM has two). DDR SDRAM for notebook computers, SO-DIMMs, have 200 pins, which is the same number of pins as DDR2 SO-DIMMs. These two specifications are notched very similarly and care must be taken during insertion if unsure of a correct match. DDR SDRAM operates at a voltage of 2.5 V, compared to 3.3 V for SDRAM. This can significantly reduce power consumption. Chips and modules with DDR-400/PC-3200 standard have a nominal voltage of 2.6 V.
 
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