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New L3 SRAM???

post #1 of 11
Thread Starter 
Hey... I ordered a Ti 1ghz superdrive yesterday...
I am upgrading from a ti800 model... I want to know if this L3 memory is the same as the 800 model? As I recall, the L3 on the 800's was DDR SDRAM... the new ones say DDR SRAM....
What difference does this make??? I want to know what kinda performance change we will see???
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post #2 of 11
[quote]Originally posted by The Lockmaster:
<strong>Hey... I ordered a Ti 1ghz superdrive yesterday...
I am upgrading from a ti800 model... I want to know if this L3 memory is the same as the 800 model? As I recall, the L3 on the 800's was DDR SDRAM... the new ones say DDR SRAM....
What difference does this make??? I want to know what kinda performance change we will see???</strong><hr></blockquote>

According to powerlogix, there is practically no difference between DDR L3 SRAM and normal L3 SRAM, the important is it's size. So you wan't see any difference of performance, the DDR thing was just a marketing trick (and a loss of money).
post #3 of 11
powerdoc, i believe he is talking about the difference between DDR-SRAM and DDR-SDRAM

not the DDR part... or at least I think thats what he means...
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post #4 of 11
It was always DDR-SRAM. I'm not really sure why they ever claimed otherwise. The difference though is latency and cost.
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post #5 of 11
In DDR DRAM (think an evolution of DDR SDRAM, maximum of twice as fast at equivalent clock I believe.), the data leaks out of a cell every few milliseconds unless you refresh it. DDR SRAM is essentially the same, only the data in the cells sits there. (SRAM=Static Random Access Memory, DRAM=Dynamic Random Access Memory.)
post #6 of 11
<a href="http://www.webopedia.com/TERM/S/SRAM.html" target="_blank">Here</a> is a good explanation of the speed differences between DRAM/SDRAM variants and SRAM.
post #7 of 11
[quote]Originally posted by Telomar:
<strong>It was always DDR-SRAM. I'm not really sure why they ever claimed otherwise. The difference though is latency and cost.</strong><hr></blockquote>

Interestingly enough the german specification datasheet of the former G4 TiBooks (4/2002) correctly states DDR-SRAM, while the english version states DDR-SDRAM. Must be a typo-error.
post #8 of 11
L3 cache is always static ram, wich means far better latency.
If you are interested by the difference between DDR and SDR SRAM see this link : <a href="http://www.powerlogix.com/press/releases/2002/020826.html" target="_blank">http://www.powerlogix.com/press/releases/2002/020826.html</a>

The conclusion show that there is nearly no difference between the two types of memory : what is more important is the size of the L3 cache.
post #9 of 11
[quote]Originally posted by Powerdoc:
<strong>L3 cache is always static ram, wich means far better latency.
If you are interested by the difference between DDR and SDR SRAM see this link : <a href="http://www.powerlogix.com/press/releases/2002/020826.html" target="_blank">http://www.powerlogix.com/press/releases/2002/020826.html</a>

The conclusion show that there is nearly no difference between the two types of memory : what is more important is the size of the L3 cache.</strong><hr></blockquote>

Then again, giving people the impression that DDR L3 brings absolutely no speed gain incidentally happens to be in PowerLogix' best interest, as they only offer SDR L3, so I wouldn't really expect this to be the most unbiased source around.

Bye,
RazzFazz
post #10 of 11
'some of you guys dont get the post -sram is faster than ddr sdram wich is faster than sdam. but I doubt it makes any diff.
post #11 of 11
[quote]Originally posted by RazzFazz:
<strong>

Then again, giving people the impression that DDR L3 brings absolutely no speed gain incidentally happens to be in PowerLogix' best interest, as they only offer SDR L3, so I wouldn't really expect this to be the most unbiased source around.

Bye,
RazzFazz</strong><hr></blockquote>
Perhaps but it's the only one.
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