MarkM
Member
Registered: 11th Apr 01
Location: Liverpool
User status: Offline
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Someone explain to me the difference please...
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MarkM
Member
Registered: 11th Apr 01
Location: Liverpool
User status: Offline
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Right below is the Geeks version of the difference...but essentially whats the difference in performance etc?? Is 1MM DDR comparible with 1MB DDR2??
The first and perhaps most obvious is the socket difference. The normal DDR DIMM has 184 contacts. The new DDR2 module has a total of 240 contact and the notch is different, so you shouldn't have a problem determining which type of memory you have (or if you have the wrong memory for your motherboard). The second is the packaging used for the chips. While most of the DDR modules used the older TSOP method of chip packaging, the newer DDR2 uses FBGA. The other improvements to DDR2 include On-Die Termination and Off-Chip Driver calibration. While JEDEC says that DDR can go up to 1GB per module, DDR2 can go up to 4GB. And, normally, DDR memory runs at 2.5V while the newer DDR2 runs at 1.8V Laptop users rejoice!
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John
Member
Registered: 30th Jun 03
User status: Offline
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DDR2 is faster and it doesn't really matter because you can only use whatever your motherboard supports.
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MarkM
Member
Registered: 11th Apr 01
Location: Liverpool
User status: Offline
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Why is it faster?
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John
Member
Registered: 30th Jun 03
User status: Offline
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I haven't got time to look just now before I start work in 15 mins but if the above explanation was geeky to you I doubt the technical reason will be usefull.
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MarkM
Member
Registered: 11th Apr 01
Location: Liverpool
User status: Offline
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In laymans terms will be fine...
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Daniel_Corsa
Premium Member
Registered: 21st Apr 04
Location: Wigton, Cumbria
User status: Offline
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The DDR DIMM has 184 contacts. (400Mhz)
The DDR2 DIMM has 240 contacts. (400Mhz ++++)
Better data transfer speeds
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