dual channel memory

[Homer]

Ive got two different sticks of 256 ddr memory, they have
the same cl timings. Ive ordered a new abit ax8. how matched does
memory have to work for dual channel to function.
ive also got 2 matched sticks of 512 coming as well

regards
homer

 

[Nikonja]

Ive got two different sticks of 256 ddr memory, they have
the same cl timings. Ive ordered a new abit ax8. how matched does
memory have to work for dual channel to function.
ive also got 2 matched sticks of 512 coming as well

regards
homer

As far as I know they "have" to be exactly the same for DC to work!

 

[Philburg]

Same size, layout, speed, and probably manf. are necessary. But in theory
it might work anyways with different manfs., I've heard of it.

As far as I know there is no down side to trying and having it fail.
Install it in the proper slots, and watch your POST to see if it says dual
channel.

 

[Wes Newell]

As far as I know they "have" to be exactly the same for DC to work!

They just both have to function with the same timings. you can even
mismatch speeds, like PC3200 and PC2700 if you rum both at 166MHz, CL2.5,
etc., etc. the controller doesn't care who made it or what speed it is
other than this.

 

[Ed Light]

If they aren't matched you can try it and see what happens. I had two
Corsair Value Selects that actually had different chips on them and wouldn't
go dual channel.

I now have 2 Kingmax dual channel sets that all run together in dual
channel.
--
Ed Light

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[DevilsPGD]

In message <[email protected]> Wes

They just both have to function with the same timings. you can even
mismatch speeds, like PC3200 and PC2700 if you rum both at 166MHz, CL2.5,
etc., etc. the controller doesn't care who made it or what speed it is
other than this.

In theory, yes. In practice, matched pairs is sometimes required.

I have four pieces of RAMs, identical model numbers but different
batches, but if placed in the wrong configuration I get memtest86 errors
and general system instability.

 

[LinusIsDead]

In theory, yes. In practice, matched pairs is sometimes required.

Well you have to understand, for Wes it works like magic, the secret is
you have to use a (I hope it doesn't blow up) $12.00 PSU and run Linux.

;-)

 

[Wes Newell]

Well you have to understand, for Wes it works like magic, the secret is
you have to use a (I hope it doesn't blow up) $12.00 PSU and run Linux.

;-)

Nothing magical about. You just have to know wtf you're doing.
BTW, When I bought my cheap 600W PSU, it was $24, but that was 19 months
ago. And fyi it's still going strong being run 24/7 in the machine I'm
typing on (My server below). It's also the machine I'm using 30 year old
wheel bearing grease for thermal compound. But I only re[laced the real
stuff on Sept 1 this year. Still no problems with it either. It's not that
I'm a cheap SOB, it's just I don't like being played by marketing hype. I
don't drink bottled water either, unless it's the filtered water I put in
the bottle.

 

[Ed Light]

don't drink bottled water either, unless it's the filtered water I put in
the bottle.

Darn filters don't remove the flouride (if your town puts it in).

In fact Brita brags that theirs lets it through.


--
Ed Light

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MS Smiley :-\

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(e-mail address removed)
Thanks, robots.

Bring the Troops Home:
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[VanShania]

If you don' t use matched ram in dual channel, your computer will crash
frequently.

 

[DevilsPGD]

If you don' t use matched ram in dual channel, your computer will crash
frequently.

This depends on the RAM -- In theory, it shouldn't be required.

In practice, I've run into problems with RAM with identical specs, model
number, even model numbers on the chips -- They were manufactured at the
same plant about 30 weeks apart.

Swapping the physical order fixed up the problems (both actual, as seen
by Windows crashing and data corruption while Windows was running and
reproducible by memtest86+)

 

[Wes Newell]

If you don' t use matched ram in dual channel, your computer will crash
frequently.

Not if it's installed and configured by someone that knows what they're
doing.