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Ive just been studying about all the forms of SDRAM etc, and when it came to buffered/registered DRAM I found out that normal PC's usually have upto 4 slots for SDRAM, any more gives producers of motherboards lots of electrical problems. So to solve the problem of systems that require maybe 6, 8 slots, they require special DRAM, such as buffered/registered SDRAM. This SDRAM has a special buffering chip on the address bus added to it to work as an intermediary between SDRAM & North Bridge. To take advantage of buffered SDRAM, the motherboard and brige must be able to support SDRAM. Slots requiring buffered DIMMs are keyed differently then those requiring unbuffered DIMMS so it will be physically not possible to install these DIMMs into the slots short of shaving the key. Electrically, possibly, but you have to remember that the register drives the addressing unit on the DIMM and the bridge will likely not be designed to accomidate the drain required to directly drive the memory chips on the address bus and as such may cause instability if it works at all. In addition there is a single clockcycle delay from when the address is written to the registers to when the address is propigated to the memory, in such timing errors could arrise from a bridge expecting that delay.
- you cannot use unbuffered SDRAM on a motherboard that supports buffered memory, because the notches on buffered DIMMS are in different positions than for unbuffered DIMMS.
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∙ 14y ago
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∙ 14y agogo to this site for module answers
http://www.tomshardware.com/forum/55024-30-memory-please-read-posting
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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)
If a memory module doesn't support registers or buffers?
It is called an "unbuffered dimm"
If a memory module doesnt support registers or buffers it is always referred to as a?
Unbuffered DIMM.
Can you use non ecc memory on a motherboard that supports ecc memory?
Depending on the specs of the motherboard, a motherboard that supports ECC SDRAM may support a non-ECC SDRAM module. If a motherboard can support both types, you would have the option to enable or disable the ECC feature in BIOS. Other than the fact that an ECC module has an odd number of chips, there is no other physical difference on the module. They are keyed the same.
What RAM module has 168 pins on the edge connector?
SDRAM has 168 pins and two notches on the module.
What ram has two notches on the module?
168-pin SDRAM DIMM
How many pins are on a DDR DIMM?
DIMM. Two types of DIMMs: a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom). Note that the SDRAM module has two notches (rectangular cuts or incisions) on the bottom edge, while the DDR1 SDRAM module has only one.
What is the difference between SDRAM and DIMM because I want to buy a new computer and it says it takes DDR2 SDRAM but when i search he net i find DIMMs. Will the DIMM work?
You're computer will require a "DDR2 SDRAM DIMM". DDR2 SDRAM is the type of memory you are after, it is also a DIMM. Most modern memory are all DIMM's (Dual inline memory module), much older ram were SIMMS (single ingline memory module). DIMM refers more to the physical make up of the module (DIMMS have contacts on both sides of the module). So any DDR2 SDRAM that you buy IS a dimm. You may want to look at the wikipedia page about DDR2 SDRAM at http://en.wikipedia.org/wiki/DDR2_SDRAM
Looking at a sdram dimm how can you know for certain the voltage needed by the module?
By looking at the notch on the right
How can you know the voltage an SDRAM dimm uses?
The notch on the right identifies the voltage used by the module.
What type of memory or storage device is prone to losing data if the power goes out?
A DDR SDRAM module
In SDRAM what is rising and falling edges?
In SDRAM, rising and falling edges are the opposite edges of a memory module through which data can be transferred. SDRAMs that are designed this way are called DDR (double data rate) SDRAMs.
