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advice needed, R: memory sticks

 
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Uncle Vinnie
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PostPosted: Mon May 07, 2007 3:38 pm    Post subject: advice needed, R: memory sticks Reply with quote
RE: HP a1310n / (ASUS Amberine M 1.03), XP Home.

I have 4 sticks of memory (in these slots):

2x512's that came with the PC (0,1)
1x1024 (2)
1x512 (3)

None, as far as I know, are rated 'dual channel' - maybe the original 512's,
but they were in slots 0 and 1, and all 4 slots are black.

Question, looking at the above mix, what do you suggest would be the most
optimal arrangement, slots 0-3?

I know mix/match is never the absolute optimal, but I might as well make the
most of it...

Thank you!


--
B'rgds,

Vinnie
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Paul
Guest
PostPosted: Sat May 12, 2007 12:44 am    Post subject: Re: advice needed, R: memory sticks Reply with quote
Uncle Vinnie wrote:
Quote:
Hi, Paul.. first I want to thank you for the detailed explanation.. and at
the same time apologize for taking this long to get back to you.. Part of
it is that I'm up to my neck in alligators, backburnering my personal
stuff... the other part is that I wanted to absorb your info.

I ran CPU_id and it tells me this is a rev E4 board.

Now, for the rest... In simple terms, it seems to me that slots 1/2 should
'balance' with 3/4 and that in order to do this, either dump a 512, or look
into the other options...

Another 1meg board, comparable to what I have, makes sense...I wonder what
would happen if I balanced things with a 1G in slots 1 and 3, and a 512 in
slots 2/4? Interesting..

But here is a 'dumb' question - are you saying that my system is better off
without that 512? In other words, 2x512s' and 1g is better than 2x512's and
1G/512? Better in terms of speed, and memory?

Curious about that! That would be interesting.. please let me know, thank
you!


2x512 + 1g

(1) Gives dual channel mode, a plus.
(2) Still runs at Command Rate 2T, due to the 2x512 in one channel

2x512 + 1G/512

(1) Runs in single channel mode, a bit slower.
(2) Still runs at Command Rate 2T, as both channels have double loads.

So the first config is slightly faster, and you can easily test that
for yourself, with a benchmark.

Paul
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Uncle Vinnie
Guest
PostPosted: Sat May 12, 2007 1:19 pm    Post subject: Re: advice needed, R: memory sticks Reply with quote
Paul wrote:
Quote:
Uncle Vinnie wrote:
Hi, Paul.. first I want to thank you for the detailed explanation..
and at the same time apologize for taking this long to get back to
you.. Part of it is that I'm up to my neck in alligators,
backburnering my personal stuff... the other part is that I wanted
to absorb your info. I ran CPU_id and it tells me this is a rev E4 board.

Now, for the rest... In simple terms, it seems to me that slots 1/2
should 'balance' with 3/4 and that in order to do this, either dump
a 512, or look into the other options...

Another 1meg board, comparable to what I have, makes sense...I
wonder what would happen if I balanced things with a 1G in slots 1
and 3, and a 512 in slots 2/4? Interesting..

But here is a 'dumb' question - are you saying that my system is
better off without that 512? In other words, 2x512s' and 1g is
better than 2x512's and 1G/512? Better in terms of speed, and
memory? Curious about that! That would be interesting.. please let me
know,
thank you!


2x512 + 1g

(1) Gives dual channel mode, a plus.
(2) Still runs at Command Rate 2T, due to the 2x512 in one channel

2x512 + 1G/512

(1) Runs in single channel mode, a bit slower.
(2) Still runs at Command Rate 2T, as both channels have double
loads.
So the first config is slightly faster, and you can easily test that
for yourself, with a benchmark.

Paul

Paul, I tested.. with and without the extra 512.. here's what I got...
With 512/512 - 1G/512: single channel, 2T, 49.266 (pi)

Removing the 512 - (512/512 - 1G/empty): single channel, 2T, 47.281.

Difference in speed... I will take your advice - there is a slight speed
advantage... I will find the matching 1G to what I have.. and re-test...
again, following your advice!

Thank you again!

--
B'rgds,

Vinnie
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