Czy wolisz polską wersję strony elektroda?
Nie, dziękuję Przekieruj mnie tam
max. 128MB/bank, nie każda pamięć "dwustronna" ma 2 banki.
-Pytong- napisał:Dla chipset-ów bx-a nadaje się PC66 czy PC100 .. 133 nigdy nie zostałoby wykorzystane (co nie znaczy że PC133 nie bedą chodzić)
Cytat:Q: I don't quite understand which 256MB modules will run. Can you explain a bit more on those 16Mx8 etc. terms?
A: I'll try. There exist at least four different types of 256MB modules.
(1). Modules with 16 ram chips, each chip organized as 16Mx8. The 16Mx8 means each ram chip has 16 million addresses and the data width of a ram chip is 8 bit. Since the ram interface calls for 64 bit data width, 8 chips are needed to form one ram bank. But because there are 16 modules on the dimm, this means there have to be two banks. The 16Mx8 also means one chips has a capacity of 128mbit. These are the modules which work on boards based on the bx chipset.
(2). 16 ram chips per module, each chip organized as 32Mx4. Because one chip has only a data width of 4 bits, all 16 chips are needed to form one ram bank. Such modules are cheaper to produce (because of the lower pin count of each ram chip), but they won't work in bx-based boards and will likely cause problems in any other chipset too, IMHO you really shouldn't buy them. They are mostly used in cheap generic ram (an exception are registered ram modules, where such chips seem to be quite common and where they shouldn't cause any problems in a board with a chipset which supports them - but unfortunately the bx does not).
(3). 8 ram chips per module, each chip organized as 32Mx8. Newer quality Dimms feature such organization, but they will not work on bx-based boards. Each chip has 256mbit and all 8 chip form one bank - to the chipset this looks almost the same as (2).
(4). Intel lists another type in their newer chipsets datasheets: 8 ram chips per module, each chip organized as 16Mx16. These modules consist of 2 banks, each bank has 4 chips. They aren't widely used in normal 168-pin dimms in reality yet but might be more popular in the future (they have 4 chips per side), but are often found in so-dimms for notebooks (4 chips per side). Such modules won't work, they look quite similar from a chipset perspective to type (1), but they require the so-called "8k refresh" and the bx chipset only supports up to 4k refresh.
Expect more of the type (3) and probably (4) to show up in the future for sale. They will likely be cheaper than the type (1) , because they use fewer chips, and with newer process technologies (read: smaller structures) the ram chips itself shouldn't be a lot more expensive to manufacture.
