single rank & double rank ????

[akamarinos1442169139]

στο συστημα μου εχω 2 stick geil ultra-x 512MB εκαστο και θελω να βαλω ακομα 2 stick των 512

παρακατω παραθετω πινακα απο το manual της mobo μου

το γνωριζω πως πρεπει να πεσω σε 2Τ

αλλα δεν θα ηθελα να βαλω και διαιρετη

το single rank και double rank που αναφερει ο πινακας τι ειναι??

single sided και double sided αντιστοιχα?

δηλαδη stickaκια που εχουν τα chip απο την μια μερια ή και απο τις δυο??

[Stelaras]

Το rank δεν εχει σχεση με τα sides . Το rank ειναι τα banks του dimm. Μπορει να βρεις ενα double sided , αλλα single rank.

Ο μονος τροπος να μαθεις το rank ενος dimm , ειναι να επικοινωνησεις με την κατασκευαστρια εταιρια. Καθε μητρικη , οπως καταλαβες απο το pdf , εχει ενα μεγιστο αριθμο ranks που μπορει να διαβασει.

Επισης , οσο περισσοτερα ranks εχεις εγκατεστημενα , τοσο γρηγοροτερες επιδωσεις εχεις.

Για το τι ακριβως ειναι bank & rank , θελει λιγο αναλυση . Ισως με λιγο googlαρισμα να το βρεις εαν σε ενδιαφερει.

[deadlock7]

Kαι για να συμπληρώσω κάνω copy-paste κάποιες πληροφορίες.

What is a Memory "Rank"?

The term "rank" was created by JEDEC, the memory industry's standards group.

The concept of Memory Rank applies to all memory module form factors, including desktop DIMMs, notebook SODIMMs, workstation and server Registered DIMMs; in general, though, it is only critical on server platforms due to their higher memory capacity. A Memory Rank is a block or area of data that is created using some or all the memory chips on a memory module.

A rank must be 64-bits of data wide; on memory modules which support Error Correction Code (ECC), the 64-bit wide data area requires an 8-bit wide ECC area for a total width of 72-bits. Depending on how memory modules are engineered, they can contain one, two, or four areas of 64-bit wide data areas (or 72-bit wide areas, where 72 bits = 64 data bits and 8 ECC bits).

Why is the total number of Memory Ranks important?

New servers (Intel E7520/7320 based server) limit the number of Memory Ranks of PC2700, PC3200, or PC2-3200 memory. That means that the combined number of Memory Ranks for all the memory modules must not exceed the specified maximum number of ranks. If the number of Memory Ranks exceeds the specified maximum ranks, the server may not boot or may not operate reliably.

How many ranks do typical module types have?

* Single-sided modules are always single-rank.

* Doubled-sided unbuffered DIMMs and SODIMMs are always dual-rank.

Registered DIMMs, used for servers and workstations, vary from a single-rank to up to four ranks, as illustrated in the chart below:

Ranks=Number of 64-bit wide data areas

In the first example, a single-sided module is always single-rank.

A doubled-sided Registered DIMM can be:

* Single-sided, with all the memory chips on both sides representing a single 64-bit wide + 8 bit ECC area, or

* Dual-rank (with one rank per side), or

* Quad-rank (with 2 ranks per side for a total of 4 ranks)