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Old 09-06-2012, 01:14 AM   #1
Optomus
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Question Could somebody explain me the High and Low Density RAM concept ?

First of all thanks for creating such a wonderful website and forum.

I have searched all over the internet but couldn't find any satisfying answer to the following questions.

1. What does term density means when it comes to RAM , does it means size ( in MB ) of a single DRAM chip present on the module, or something else ?

2.What the difference between High and Low density RAM.

Plz if somebody could explain this topic in detail ?

Thanks
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Old 09-06-2012, 07:42 AM   #2
Gabriel Torres
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This refers to the amount of cells inside the memory chip, which, at the end, corresponds to the total memory capacity of a single chip.
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Old 09-06-2012, 10:40 AM   #3
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Thanks ! Gabriel.

So what's the difference between a Low and High density RAM ?
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Old 09-07-2012, 06:34 AM   #4
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One has a low-cell count, the other one has a high-cell count. Problem is, what was "high" ten years ago is probably "low" for today's standard.
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Old 05-05-2013, 01:20 PM   #5
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Fist of all, these "high" and "low" are important for old DDR = DDR1 only.
They are important because most of the DDR controllers don't recognize "High Density" RAM.

Then how is it happened that we have lots of "High Density" RAM on the second-hand (like eBay) market?

Almost nobody needs old servers. So second-hand market has lots of specific server memory, which can be inserted into regular workstations, but will not work there... That old DDR1 server memory can be easily Re-Programmed into "High-Density" memory which can be recognized and operated by some (about 9% of them) memory controllers - mostly with AMD CPUs.

That's how we got lots of "High-Density" cheap DDR1 modules on second-hand market.

It could be very reliable good memory, but the problem is the people who Re-Program these memory modules. They also change timing in order to sell slow memory as fast one....

As soon as you catch them, they start screaming that you are an idiot who knows nothing and that your motherboard is not compatible with High Density DDR.

Your motherboard can be compatible or not compatible with High Density DDR, but it will definitely not work with badly counterfeited memory modules with horribly overclocked CAS (and other timing)...

These eBay suppliers are dirty people. They are dare even to call "brand new" scratched DDR modules without any brand sticker on them - only their own home-made stickers are there.

Unfortunately eBay administration doesn't care at all; eBay doesn't want to help cheated customers and often violate their own buyers protection...

That is the complete story about "High" and "Low" density RAM.
Once again, it is relevant for old DDR only.

Last edited by BigPuppy; 05-05-2013 at 01:30 PM.
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