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Latency vs. MHz (Ram)

post #1 of 13
Thread Starter 
Which would make more of a difference: Memory @ 4-4-4-12 or at 900-1000mhz?

For example, I can overclock my memory to about 1000mhz, or I can get the low latency.
post #2 of 13
1000 MHz would be better
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Forever Young
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post #3 of 13
ya on dd2 it seems its more about raw speed then low timings i get alot more bw running my memory at 880 then at 650 with 3 3 3 timings.
SABERWOLF
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XEON-WOLF
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SABERWOLF
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XEON-WOLF
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post #4 of 13
Thread Starter 
hmm... so whats the point of low latency???

what is latency anyways?
post #5 of 13
The speed will be more advantageous over the timings. There are reviews on this, I'm too lazy to look it up for you
Monstar Bawls
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post #6 of 13
Even thought my article is geared towards Intel systems, it is the same principle. Read here.
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post #7 of 13
Low latency is more important on AMD systems that use DDR ram. I believe this has something to do with the built in memory controller. With AMD DDR2 and intel systems, the way the memory controller is configured it favors a high ram speed over low latency.
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post #8 of 13
article in Russian but you can get a pretty good idea about MHZ VS latenice from the graphs
http://www.overclockers.ru/lab/23246.shtml
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post #9 of 13
You can always use memtest (I think Sandra does it too) to check out bandwidth.
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post #10 of 13
Tight/small timings DOES NOT equal low latency.

2-2-2-5 at 50MHz would suck big time, in terms of latency, if compared to 3-3-3-8 at 200MHz.

Biggest misconception in memory overclocking.

The value of each timing is the number of memory clock cycles, not time, given to each timing. The lower we can get the time of each timing, the better. The less time each timing is allocated, the lower your latency. And, the time of one memory clock cycle is found by dividing 1 by your effective (ie, DDR2 xxx) memory speed.

Just oc your memory as far as you can to get maximum bandwidth, and then tighten your timings so that latency is equal to, or slightly lower than, latency at stock clock (with timings tightened).
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