There are three possibilities for what the text meant depending on how poorly it was translated: 1) The warning was probably translated poorly and would more likely actually mean to tell you that your motherboard doesn't support 16 GB DIMMs or larger. If the exact phrase was (256M圆4) then it's referring to a 16 GB DIMM.
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If you do, however, you should now know how to tell exactly what it's telling you.
When it comes to PC memory, it's not common to see modules quoted that way outside of engineering related materials. If you want to use 4 ICs, you'll need 16 bit pages. If you want to use 16 ICs, you'll need 4 bit pages. Since a PC memory controller is designed to access ICs where the bus and page width are the same instead of the other unusual scenarios I explained above, that means you're going to be using 8 bit page devices. If you want to use 8 chips, they each need to have an 8 bit bus. You can do this in any number of ways like you might imagine.
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In the case of a common DDR2 DIMM, you have to make a module that matches up with the expected 64 bit bus. Banks are more or less transparent to you as a designer of something using a memory IC since the bank is normally determined by using a few of the most significant bits in the address lines, but they do exist as a physical structure inside the IC. It's not uncommon for say a 256Mx8 DRAM device to in actuality be something like 16M pages x 8 bits wide x 8 banks. If you see a third number, it's often how many banks are in the array.
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You get the idea.Ĭonsequently, when talking about a memory device, the big number is going to be how many pages there are (256M = 268,435,456 pages) and the small number is how many bits wide the page is (64 = 64 bits per page).
Some types of parallel memory might have an 8 bit bus but a 16 bit page where any read operation requires two clock cycles to see the entire page.
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Serial memory for instance has to shift the entire page out one bit at a time. This is often also the bus width of the IC, but it doesn't necessarily have to be. This is the smallest organizational unit in the memory array and usually indicates how the memory is physically structured. Other sizes are possible such as 32 bits, but they're less common. A page in memory is often 4 bits, 8 bits, or 16 bits wide. Memory ICs have two main attributes: Page size and page count. I work with raw memory chips in my projects, so I'm pretty confident when I tell you this:
Nobody has had it quite right yet, but a few have been close. So if this ram and any other 2GB ram, i mean the ones i could find specs for, is made from 256 X 64 chips what ram i suppose to plug on this board? If you have a look at Crucial DDR3 list most ram is made from 256 X 64 or less, only a few ram kit (of 8 or 16GB)are made from greater chips. I had a look around and i can't find any 2GB ram made up of greater chips. So this is a 2GB stick and 256 X 64 i suppose mean that on the DIMM there are 8 chips of 256 MB each which makes a total of 2048MB stick. "Component configuration - (For example: 64Meg x 64) Indicates the size of the memory chip components on the module". Never seen a ram stick with 64 chips on it. Sounds to me like you could buy any 2 GB or 4 GB stick and be safe? I think with 256 they mean megabytes and not megabits, if it is megabits then you need 64 chips to make a 2GB stick, 256 megabits = 32 Megabyte X 64 = 2048MB. 256 megabits = 32 Megabyte, so eight of those would make a 512 MB DIMM and sixteen would make a 1GB.