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darklord · 30-07-2005, 12:13 PM

Generally DDR1 has TSOP ram chips whereas DDR2 has BGA ram chips...
Also DDR1 is a 184 Pin module whereas DDR2 is 240 pins

Also DDR1 generally works at 2.5,2.6 Upto 3.6 Volts Vdimm whereas DDR2 works @ 1.8V and above.

Hence power requirement of DDR2 is less.

DDR1 can run at very tight timings which DDR2 cant.

For example DDR1 can run at 1.5-2-2-5 but DDR2 cant.generally DDR2 works at 3-4-4-10

But DDR2 can do higher frequencies than DDR1

This is DDR 1 -

This is DDR2 -

the Square shape ram chips on the DDR2 is called BGA chip meaning Ball Grid Array

I hope that clarifies your doubts.

30-07-2005, 12:13 PM	#2 (permalink)
darklord Wise Old Owl Join Date: Oct 2003 Location: Pune,India Posts: 1,445	Generally DDR1 has TSOP ram chips whereas DDR2 has BGA ram chips... Also DDR1 is a 184 Pin module whereas DDR2 is 240 pins Also DDR1 generally works at 2.5,2.6 Upto 3.6 Volts Vdimm whereas DDR2 works @ 1.8V and above. Hence power requirement of DDR2 is less. DDR1 can run at very tight timings which DDR2 cant. For example DDR1 can run at 1.5-2-2-5 but DDR2 cant.generally DDR2 works at 3-4-4-10 But DDR2 can do higher frequencies than DDR1 This is DDR 1 - This is DDR2 - the Square shape ram chips on the DDR2 is called BGA chip meaning Ball Grid Array I hope that clarifies your doubts.