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Depending on your motherboard it is most likely because most motherboards can only use one type of ram at a time. So you can only use ddr with more ddr to see more than one stick of ram.

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Q: Why did your PC stop recognizing your SDRAM when you installed DDR RAM if your motherboard supports them both?
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If your motherboard supports ecc sdram memory can you substitute sdram memory that does not support ecc?

Yes you can. There's also an option in the CMOS setup to enable or disable this feature if your motherboard supports it.


Can upgrade regular sdram to ddr ram?

It is difficult unless the motherboard supports DDR slots.


Can you use DDR400 on a P4VXASD2 motherboard?

No you cannot the ECS P4VXASD2 supports the following:Two 184-pin 2.5V DDR SDRAM (DDR266/DDR200) Maximum: 2GB DDR or SDRAM (Buffered) / 1GB DDR or SDRAM (Unbuffered)


What is the maximum amount of RAM supported by an Intel D845GLLY motherboard?

The Intel D845GLLY motherboard supports a maximum of 2GB of PC133 SDRAM, using two 1 GB modules.


What is dual channeling?

Dual-channel architecture requires a dual-channel-capable motherboard and two or more DDR, DDR2 SDRAM, or DDR3 SDRAM memory modules. The memory modules are installed into matching banks, which are usually color-coded on the motherboard.


Can you convert a motherboard that uses SDR SDRAM modules to DDR SDRAM?

No.


How do you replace sdram into ddr?

In order to upgrade SDRAM with DDR, you will need to replace your motherboard. DDR uses a different slot than SDRAM, so if your motherboard is using SDRAM currently, you will most likely have to replace your motherboard in order to make your system support DDR.


Can you use DDR2-SDRAM on your Pentium III which supports only SDRAM?

No.


Looking at sdram dimm how can you know the certain voltage need by the module?

The positions of two notches on a SDRAM DIMM identify the type of DIMM and the voltage requirement and also prevent the wrong type from being installed on a motherboard.


What memory can you use with a p4vxasd2 motherboard?

DDR or SDRAM


Can you utilize the DDR-SDRAM and the SDRAM slots on your motherboard at the same time in order to gain more speed?

No.


Ddram and sdram can be the same pin because i have old motherboard that i want to change a new oneis it possible to use my old sdram to my new motherboard which is ddram?

No. SDRAM has two notches and DDR SDRAM has only one so besides all the electrical incompatibilities it won't physically fit.