What is the difference between ddr1 ram and ddr 2 ram?

Answer 1

The advantages as each proceed to the next DDR version. Not only is it more capable, but it is faster. However, an issue is that the latency's are really high as you go to DDR3, while they are lower in DDR1 and DDR2. I am not sure for the reason of this, however I will define latency. Latency is the time it takes the RAM to 'communicate.' The higher the latency, the worse. However, somehow, DDR3 uses high latency and yet it is faster than DDR2 and DDR1.

Pro-tip: DDR versions are not interchangeable. For example, I can't put a DDR2 RAM stick in a DDR3 memory module. The notches are orientated differently to prevent this. Check your DDR version before buying RAM, and buy the right kind!

Answer 2

The primary difference between DDR and DDR2 memory is the ability of DDR2 memory to operate the data bus at 2x the speed (compared to DDR). However, DDR2 runs the internal modules's speeds at 1/2 the clock rate. This means that if you take 2 similar DDR and DDR2 modules, and run them at the same external speed, you'd get the same data rate, but DDR2 would have twice the latency. Likewise, if you run DDR2 at 2x the data rate of DDR, you'd get 2x the data throughput, with the same latency at the DDR modules. When you are installing or upgrading DDR/DDR2 memory, make sure you get memory modules that are supported by the motherboard by type (DDR/DDR2), speed (MHz rating), and latency (most motherboard don't care about this last one), and also that ALL modules of memory on the motherboard are exactly the same speed, and latency. Ideally, they'd be the same brand too, but that can be relaxed a bit, so long as everything else is the same. Modules do not need to be the same size, but some motherboards may exhibit slightly reduced performance in DDR2 Dual-Channel mode if the modules are different sizes. Check your documentation of the Motherboard to see what your manufacture recommends for speed, max size, and latency.

Answer 3

DDR1:
->184 pins
->333 FSB
->non-center notch
->works @ 2.5 Volts

DDR2:
->240 pins
->666 FSB
->center notch
->works @ 1.8 Volts

DDR3:
->240 pins
->1333 FSB
->center notch
->works @ 1.5 Volts



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Answer 4

A newer type of RAM.

This is not too important - just get the right one. (DDR2/DDR3 are the main ones)

This is knowledge needed when building computers (fitting correct type)

Nowadays, you need 1GB min to run modern OSes and software. 2 GB is good and 4GB - 8GB for multimedia and 4GB - 16GB for highly intensive gaming.

Written by a 10 year old.

Answer 5

Hi Friends,Am VelMuruagn,Please Find The Diff B/w DDR1&DDR2:

DDR1DDRI working voltage of 2.5Vthe PIN pin 180pin,DDRI clocked at 266/333/400,clocked at a frequency up to 400

DDR2DDRII working voltage of 1.8v.DDRII a pin pin 220pinDDRII 400/533/667MHzDDR2 of up to 800

Answer 6

They are 2 different types of ram (memory) used on newer and older computers.

Answer 7

ddr3 ram is faster and much modern, its newest type of ram.

Answer 8

double data read 2nd time