DDR2 ECC Ram not fitting?

[Jewsus]

Hello Guys

Can somebody please tell me why the kingston KTM5780 (DDR2 ECC 4Gb) ram stick does not fit in this motherboard witch supports ddr2 ecc ram?

Maybea im just blind but i have no clue

Thanks for answers! :)

[Electronics Wizardy]

It looks you have a fully buffered ddr2 dimm. They are different from normal ddr2 ecc, and won't fit in the same slot. You need to get normal ddr2 ecc, not the fully buffered ram.

[Kilrah]

You got an F module (fully buffered), different type.

 

https://en.wikipedia.org/wiki/DDR2_SDRAM#Chips_and_modules

 

Quote

1. Optionally implement ECC, which is an extra data byte lane used for correcting minor errors and detecting major errors for better reliability. Modules with ECC are identified by an additional ECC in their designation. PC2-4200 ECC is a PC2-4200 module with ECC. An additional P can be added at the end of the designation, P standing for parity (ex : PC2-5300P).
2. Be "registered" ("buffered"), which improves signal integrity (and hence potentially clock rates and physical slot capacity) by electrically buffering the signals at a cost of an extra clock of increased latency. Those modules are identified by an additional R in their designation, whereas non-registered (a.k.a. "unbuffered") RAM may be identified by an additional U in the designation. PC2-4200R is a registered PC2-4200 module, PC2-4200R ECC is the same module but with additional ECC.
3. Be aware fully buffered modules, which are designated by F or FB do not have the same notch position as other classes. Fully buffered modules cannot be used with motherboards that are made for registered modules, and the different notch position physically prevents their insertion.

 

[Jewsus]

oh man, i didnt know that there are different types -.-

 

do you have any recomandations for ramsticks witch would fit? its a dual cpu motherboard.

[Kilrah]

Well, any of the types that are mentioned as compatible in your motherboard's manual...