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I saw this and it got me excited for the possibility of having 16GB ram in a mini-ITX system.

Then I realized it is server memory.

I'd have to opt for this instead. More than twice as expensive.

Why? I was under the impression that Registered memory is more expensive to produce. They are able to cram 18 memory chips onto that module where normal ones only have 8 chips. I suspect that under the Adata heatspreaders they only have 16 chips. Are there strange economic factors at play here?

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closed as not a real question by Journeyman Geek, Simon, Brad Patton, Dave M, 8088 Apr 25 '13 at 16:17

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

You have to add more capacity to store the ECC checksums and registered chips are less produced/more expensive. The real reason, I guess, is that server people want reliablity more than anything and is less sensitive to price... – Oct 9 '11 at 22:33
Oops I just realized I typed the title question wrong. Fixing now. – Steven Lu Oct 9 '11 at 22:42
up vote 3 down vote accepted

Yes, it's due to basic economic principles in effect.

Supply and Demand: The demand for such large RAM capacities on a single stick is mainly for servers at this time, and the amount manufactured (supply) will be higher. So, both Supply and Demand are higher for 8 GiB ECC RAM sticks than they are for non-ECC, making them substantially lower in price.

Supply and Demand

There is probably a little bit of Economies of Scale going on as well, making the increased manufacturing of 8 GiB ECC sticks cheaper, even though they include more RAM chips, but S&D will be the main factor.

Ecomomies of Scale

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Okay. Does this mean that basically it makes more sense for a manufacturer (for whatever reasons) to sell their unregistered desktop 8GB DIMMs at $200 each today, even if it only costs them $60 to produce them? It just seems to me that the demand would go up if they lowered the price.... – Steven Lu Oct 9 '11 at 23:37
@Steven: No. You need to read up on S&D. Because Demand is low at this time they cannot manufacture higher Quantities to increase supply without making a loss. Competition is another factor which determines Supply. Prices are not set arbitrarily, but determined to maximise Profit taking competition into account. – paradroid Oct 9 '11 at 23:46
Okay, so the defining aspect of the situation is the low demand for desktop ram. Yes I am satisfied with that. – Steven Lu Oct 9 '11 at 23:46
@Steven: Not just Demand. Supply as well. Think about the reasons why DDR2 RAM is now more expensive than DDR3. – paradroid Oct 9 '11 at 23:47

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