"SDR" means single data rate memory and refers to how often data is transmitted per clock cycle. SDR memory transmits data once per cycle (on the clock's rising or falling edge). Double data rate (DDR) memory transmits data twice per clock cycle, on both the rising and falling edges, increasing memory bandwidth.
Double data rate memory is common in x86 PCs. Most new Athlons and some P4s use DDR SDRAM, other P4s use RDRAM. Both RDRAM and DDR SDRAM transfer data on both edges of the clock signal.
Currently, PowerMacs use SDR SDRAM (PC 133), transferring data once per clock, with a clock rate of 133MHz. The strange thing is why mention it when 1) all Macs use SDR RAM at present 2) SDR RAM isn't impressive, as it is quite old technology. Perhaps something DDR this way comes...
I agree with the last two posters. Looks like you missed one of the best devices in your new G4 Eugene. <img src="graemlins/lol.gif" border="0" alt="[Laughing]" />
rdram is totally different from conventional ram, its 400 mhz scalabe to 1024 mhz it is designed to be incredbly fast, but from what I hear(and experienced) its buggy, and actually not much of a performance increase over ddr. and likewise ddr isn't that much of a performance increase over sdr in terms of ram at least, if hte new g4 had ddr ram it would probably perform about 10-12% better at most applications, but then again some applications would get MASSIVE increase in speed and performance if apple used ddr ram and sped up the system bus.
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Weird. Why would they even bother with adding that to the description?
btw...IT SHIPPED.
[ 01-31-2002: Message edited by: Eugene ]</strong><hr></blockquote>
SDR?
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SDR?</strong><hr></blockquote>
Opposite to DDR.
Double data rate memory is common in x86 PCs. Most new Athlons and some P4s use DDR SDRAM, other P4s use RDRAM. Both RDRAM and DDR SDRAM transfer data on both edges of the clock signal.
Currently, PowerMacs use SDR SDRAM (PC 133), transferring data once per clock, with a clock rate of 133MHz. The strange thing is why mention it when 1) all Macs use SDR RAM at present 2) SDR RAM isn't impressive, as it is quite old technology. Perhaps something DDR this way comes...
Now THAT'S weird! I wonder what the French version looks like? Constant blur effect? Maybe the German series has a Neo-Cubic feel to it?
G-News
PS Nice buy Eugene
<strong>Both RDRAM and DDR SDRAM transfer data on both edges of the clock signal.
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Actually, if I remember correctly RDRAM isn't only DDR, but QDR (quad).
Bye,
RazzFazz
<strong>Actually SDR in this case probably stands for Superdrive
That's what I originally thought. Then assumed I was just ignorant.
<strong>btw...IT SHIPPED.</strong><hr></blockquote>
Uhh, Eugene?
You are gonna, like, sound off once it arrives, & give us all the gory details, right???