Identifying the Samsung ram module help .

[dusko0216]

Ok guys,I need some help in identifying if my ram module is with high density chips or not.

The ram module is Samsung 4GB M395T5160QZ4-CF7

Other markings are 2Rx8 PC2-6400U-666-12-E3

M is for memory module
3 is DIMM type
95 is x72 240pin Fully Buffered DIMM
T is DDR2 SDRAM (1.8V VDD)
51 is depth 512M
6 is 8 Banks & SSTL-1.8V
0 is bit organization x4
Q is component revision 17th Gen.
Z is FBGA (lead free)
4 is PCB revision 4th Rev.


On ebay it is advertised as high density ram and only compatible with AMD processors.

It has 16 chips on one side and 16 on the other side.

If it is with high desity chips ,then there would be a lot less chips on the module as high density chips need less space on the module.

Some sites labeled this as server ram.

I am using it with Amd processor

Will this work with Intel processors.

Any help is appreciated.

 

[brispuss]

The Samsung memory part number M395T5160QZ4-CF7 is fully buffered, and will only work with motherboards that supported fully buffered memory. Most standard desktop motherboards do not support fully buffered memory.

This module uses memory chips at the equivalent of 2048 Mb (~ 2 Gb) density due to dual ranking. Actually the module uses 32 x 1 Gb x 4 memory chips. The interpretation of whether this is high or low density memory is subjective, there is no official standard defining what memory is or isn't high density. However, the 2 Gb memory chips would be considered of higher density than many other chips.

This memory should work on both AMD and Intel CPU based systems.

It is noted, however, that the label which partly reads "2Rx8 PC2-6400U-666-12-E3" suggests that this module is un-buffered due to the "U" in the label. This contradicts the first part of the label (M395T5160QZ4-CF7) which according to published specifications is a fully buffered module. In which case the label should have an "F" replacing the "U". The F indicates fully buffered memory.

Also, photos of the module seen so far don't seem to show the buffer interface chip on the module, which suggests that the module may be an un-buffered type despite the label "M395T5160QZ4-CF7" which suggests a fully buffered module?

Contradictions galore!

EDIT: It appears there is something wrong with the labelling. What is the link to the eBay auction, please?

 

[dusko0216]

Here is the link

http://www.ebay.com/itm/351285558888?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT


Once the seller sold me Samsung M378T5263AZ3-CF7 , which by the numbers and letters is un-buffered type .

They must be labeling it wrong.

 

[brispuss]

Thanks for the link.

The eBay seller states in their auction that the memory is unbranded/generic type so there is no specific part number mentioned. And the photos are just for illustration purposes only, therefore the photos may not be of the actual memory for auction.

From the photos of the Samsung memory shown in the auction, the labelling is wrong (details as per my previous post). The memory modules shown appear to be either standard un-buffered (label for a start should read . . 6400U . .), or ECC un-buffered type (label should be . . .6400E . .).
Either the manufacturer has mis-labelled the modules, or someone may have "Photoshopped" the original photos to some illogical part number combination for whatever reason(s).

Regardless, the seller has stated the modules are supposed to be generic/unbranded. If so, this is risky, since the quality and reliability of the modules are questionable. It is usually preferable to buy known brand modules where quality and reliability are usually much higher than generic modules.

If the modules are actually Samsung M378T5263AZ3-CF7, then the modules are un-buffered, and should work in all systems that are compatible with the 2Gb memory chip density used in the modules.

If getting the auction modules (Samsung brand or not), and they use 2 Gb density memory chips, check that the system supports 2 Gb density memory chips. Most systems do support this 2 Gb memory chip density. But note that some older systems only support up to 1 Gb memory chip density.

 

[dusko0216]

I got an answer from the seller.

" this memory is made by the ecc registered ram chips, that's why it is so cheap and can only compatible with the AMD motherboards. but it is NOT server memory. we test it on the pc computer. we sell it so many times. "

 

[brispuss]

This reply from the seller is not really helpful, as there seem to be discrepancies in the details.

If the modules use ECC and registered chips, then the modules can ONLY be used in motherboards that support registered memory. Registered memory will NOT work in motherboards that do not have support for registered memory.

Most desktop motherboards do not support registered memory.

Registered memory (together with ECC function) are usually used in servers. And this memory is usually more expensive than standard un-buffered memory due to extra chips being used on the registered (+ ECC) modules.

Most memory should work on either AMD or Intel based systems, provided the chip densities (amongst other factors) are compatible with the memory controller.

Quite often low grade memory chips ("seconds") are used on "cheap" memory. And in some cases, different memory chip brands and/or models are used on the same module! This is generally not good as module reliability is highly questionable.

It is suggested that another source of memory be looked into, as there are inconsistencies in details for the memory from this particular eBay seller. It is uncertain as to what type of memory would actually be received if ordered from this eBay seller. And the reliability of the memory is also of concern.