ECC or non-ECC

  • Thread starter Thread starter bob
  • Start date Start date
Anyone know if this is ECC or non-ECC?

http://www.compusa.com/products/pro...37551&Pn=128MB_PC100_SDRAM_DIMM_Memory_Module

No one at CompUSA knew.
Click to expand...

ECC Ram is usually supereasy to spot, because, it either says ECC on
the label. Or it has a funky arrangment of chips (not always).

If it doesn't say ECC it's probably not. ECC costs more, which is
another hint. Same applies to things like registered or buffered, or
oddball ram.

PS: I suggest buying from a store that knows what exactly they're
selling.
 
[email protected] said:
ECC Ram is usually supereasy to spot, because, it either says ECC on
the label. Or it has a funky arrangment of chips (not always).

If it doesn't say ECC it's probably not. ECC costs more, which is
another hint. Same applies to things like registered or buffered, or
oddball ram.

PS: I suggest buying from a store that knows what exactly they're
selling.
Click to expand...

An example would be finding a DIMM with eight chips on either
side. That would be non-ECC. If the DIMM has nine chips on
either side, that would be ECC. (And not just any chips you
find, I'm talking about the ones that are identical to one
another.)

The ECC DIMM has a 72 bit wide interface, which is 9 chips of 8 bits
each. The non-ECC DIMM has a 64 bit wide interface, like
8 chips of 8 bits each.

(And there are too many different DIMM formulations, for me to
list all the combinations of ECC versus non-ECC. Yes, I'm
that lazy...)

BTW - I could not view the URL above, because it says
"Compusa is closed". Meaning they are working on their
server, I guess.

Here is a picture of a nine chip ECC PC133 DIMM.

http://www.upgradecomputermemory.co...rver-Memory/256MB-PC133-ECC-SDRAM-Memory.html

This one is non-ECC and the ninth chip is missing.

http://www.upgradecomputermemory.co...--Server-Memory/256MB-PC133-SDRAM-Memory.html

HTH,
Paul
 
An example would be finding a DIMM with eight chips on either
side. That would be non-ECC. If the DIMM has nine chips on
either side, that would be ECC. (And not just any chips you
find, I'm talking about the ones that are identical to one
another.)
Click to expand...

Their picture shows 9 but I think it only a generic picture,
as there is no mention of ECC and "Connect Computers" isn't
even a *stable* 3rd party brand, appears to be a CompUSA
put-whatever-we-have-at-the-moment,-in-the-box, brand.

BTW - I could not view the URL above, because it says
"Compusa is closed". Meaning they are working on their
server, I guess.
Click to expand...

IIRC they update their 'site around 4 AM every day. Not
100% sure about the "every" part, but at ~ 4, that'd be the
reason.
 
It has four chips on it. Is that non-ECC?
An example would be finding a DIMM with eight chips on either
side. That would be non-ECC. If the DIMM has nine chips on
either side, that would be ECC. (And not just any chips you
find, I'm talking about the ones that are identical to one
another.)

The ECC DIMM has a 72 bit wide interface, which is 9 chips of 8 bits
each. The non-ECC DIMM has a 64 bit wide interface, like
8 chips of 8 bits each.

(And there are too many different DIMM formulations, for me to
list all the combinations of ECC versus non-ECC. Yes, I'm
that lazy...)

BTW - I could not view the URL above, because it says
"Compusa is closed". Meaning they are working on their
server, I guess.

Here is a picture of a nine chip ECC PC133 DIMM.

http://www.upgradecomputermemory.co...rver-Memory/256MB-PC133-ECC-SDRAM-Memory.html

This one is non-ECC and the ninth chip is missing.

http://www.upgradecomputermemory.co...--Server-Memory/256MB-PC133-SDRAM-Memory.html

HTH,
Paul
Click to expand...
 
It has four chips on it. Is that non-ECC?
Click to expand...

I looked through the SDRAM products of one memory company, and
ECC only seemed to be done with nine chips per side. Their
non-ECC products did include a DIMM with four chips per side.
My guess would be non-ECC.

Paul
 
It has four chips on it. Is that non-ECC?
Click to expand...


Yes, and it's also higher density than many older boards
will support.

What chipset does the intended motherboard use?
 
Back
Top