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DDR2 is overstretched beyond its Gigahertz limits - Page 3

post #21 of 54
whats the difference between 800 at 4-4-4-12 vs 400 at 2-2-2-6


I always thought the timing was how many clock cycles it takes for it to do a certain thing. so if it has twice the cycles per second and has twice the latency then I figured things would be teh same other then the 800mhz would have higher bandwidth
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post #22 of 54
That's part of the calculation, but you also have to consider travel time across the motherboard and stupid stuff like that.

In the end the DDR2 comes out faster because of those added extras working against low latencies.
     
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post #23 of 54
wouldn't the travel time be the same through the mobo? Sorry I'm not trying to be a prick I honestly am not 100% on this. And I admit I was looking at it super simplistic like and I should of known better
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post #24 of 54
In the end...we can make DDR2 WAY faster than DDR. So it doesn't matter much anymore. The bandwidth is higher and the latencies are lower.
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post #25 of 54
Quote:
Originally Posted by Sideburns View Post
In the end...we can make DDR2 WAY faster than DDR. So it doesn't matter much anymore. The bandwidth is higher and the latencies are lower.
Latencies arent lower on DDR2 at all!!!
Infact they are about twice as high as DDR.
However, the higher bandwidth of DDR2 means that DDR2 modules above ~700MHz start to perform better than DDR modules.

Just wait until FB-DIMMs are more widely used in desktops. Then we will all realise what ALOT of memory bandwidth is!
    
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post #26 of 54
Quote:
Originally Posted by TheLegend View Post
That timing isn't possible, but hypothetically it would be great!
I know

I want DDR3! I mean comon, lower DDR2 to to DDR price, and then release DDR3 at DDR2 price! Why not release Socket AM3 and the K8L series of processors while we are at it?! Woo!
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post #27 of 54
Quote:
Originally Posted by alk View Post
Latencies arent lower on DDR2 at all!!!
Infact they are about twice as high as DDR.
However, the higher bandwidth of DDR2 means that DDR2 modules above ~700MHz start to perform better than DDR modules.

Just wait until FB-DIMMs are more widely used in desktops. Then we will all realise what ALOT of memory bandwidth is!
Uhh... FB-DIMMs are DDR2 and its Fully Buffered. Buffered RAM is for Servers and workstations only and are much slower than unbuffered and offer alot less bandwidth.
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post #28 of 54
The latencies in clock cycles are higher. The latencies in real time are lower.
     
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post #29 of 54
Thread Starter 
Latencies for DDR2 are much Higher than DDR1.
post #30 of 54
it seems though with the higher quality ddr2 though that it more then makes up for it in bandwith and if you get good ones also at that point you have a chance of having a quicker responce time then ddr
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