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wrugoin
12-27-04, 05:18 AM
Hey all,

I'm just reading a new review for a 6800GT and I just had a thought.... I don't know the difference between DDR memory and DDR3 memory. From what I understand, it can clock significantly higher, but why? What are the technical differences with all the different DDR memory out there: DDR, DDR2, DDR3 and after reading rumors about ATI's R520, DDR4?

harl
12-27-04, 10:55 AM
DDR2 read 4 bits per cicle (internaly) DDR3 it's a enhaced DD2
(lower voltaje & consuption)

http://www.xbitlabs.com/articles/memory/display/ddr2-ddr_2.html

So GDDR 3 1 GHZ has 250 Mhz in the internal clock.

NemesisChild
12-27-04, 10:55 PM
Also, the reason for the jump from DDR to DDR3 was because of high voltage consumption and overheating problems with DDR2.

msxyz
12-28-04, 03:35 AM
G-DDR3 employs a point to point connection rather than a bus. Micron Technology has some good .pdf covering DDR3 on their site. A bit too technical, yet a good read.