Re: RAM



Mea505 wrote:
On Mar 10, 12:13 pm, "Dr.Hal0nf1r£$"
<fem...@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Conor wrote:
In article <ca2e2f05-3f05-4d4a-a813-81f761c8c1f2
@m44g2000hsc.googlegroups.com>, Mea505 says...
If one has a PC2700 speed DDR333 1G RAM in a machine, can one also
add a higher speed along with that one stick, or does all of the
RAM need be the same speed? Just wondering, as I see that RAM has
come down quite a bit of late and there is a sale.

Thanks.

The faster stuff will just run at the speed of the lower stuff but
it'll work.

Does the speed differential between the prescribed speed of the
faster RAM and its actual working speed also affect its latency
individually; and does the cumulative latency of the entire fitted
RAM suffer as a result of this? Mathematically speaking it would
appear so: Opinions?

Regarding this question, I would ponder upon the issue of RAM and the
differences in the speeds of specific RAM that is available. For
example,
does RAM speed actually increase the computer's speed significantly
enough to consider getting the next highest speed. In this case, I
have the
2700 speed; will going to the 3600 increase my speed so much that
there will be an appreciable gain for the buck, or am I simply messing
with
toys and wasting money?

There are a number of points to consider here: Firstly the RAM speed
supported by your chipset: It's no use just plonking in1100Mhz RAM when your
chipset is only capable of supporting 667MHz for instance. Also to be
considered is processor support: Certain processors are unable to interact
with chipsets and RAM of a given working frequency; which is why
overclockers are always up with the latest technology; having a motherboard
with a chipset capable of interfacing with the fastest and most advanced CPU
while also running the latest architecture in terms of RAM at or usually
above its recommended working frequency: One can add the latest dual-cored
Intel CPU purchased yesterday for £400 and the latest RAM capable of speeds
above 1GHz to last year's socket LGA775 motherboard and get no improvement
or worse because the chipset just isn't up to it.

The question is however unrelated to the increased performance gain ratio to
frequency handling: What I was asking was if there is any data showing a
reduction in latency when mixing two or more differently rated RAM sticks:
If, for example, a 533MHz stick is joined in circuit by a 667MHz stick and
the 667 stick works at 533; will this affect the rated latency of the 667
stick and will such a reduction or increase detrimentally affect the overall
latency of the two sticks working in tandem; perhaps leading to an overall
reduction to below the rated latency coefficient of either stick in
proportion to the reduced efficiency of the one stick along with any
possible effect upon the other; therfore reducing the overall performance of
the RAM as a whole?


.



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