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I have actually requested from some memory manufacturers to clarify the memory chip architecture used on their modules within their module specifications so there can be no confusion.

So the designation 512M x 64 by itself is not really useful. Yes, I was going to add that the designation "512M x 64", for example could mean that the module uses either 512M (memory locations) memory chips, or 256M memory chips but in dual rank configuration (512M = 2 rank x 256M). Intel in publishing their memory compatibility list (which lists compatible memory up to 2 GB only), would have tested the memory that was available at the time of testing they may not have had 4 GB modules available at the time of testing. If there are specific 4 GB modules of interest, then advise their make and part numbers, and information on the chip density will be try to be found. Memory chip density is not related to whether the memory is buffered or not. Unfortunately, most memory manufacturers do not specify memory chip density on their modules so it becomes difficult to know whether the modules are likely to be compatible or not.

Generally, most older systems with older chipsets will not support modules that use 4 Gb (or higher) density memory chips, and in some cases modules with 2 Gb (or higher) density memory chips will not work either.ĭetails on memory density are available from a few memory manufacturers (via their websites). So you are wanting 2 x 4 GB modules that use 16 x 256 MB memory chip per module. The G43 chipset definitely supports up to 2 Gb (Giga- bit) capacity/density memory chips, but may not support higher density memory chips such as 4 Gb and higher.įor 4 GB (Giga Byte) memory modules, each module should have sixteen 2 Gb (= 256 MB) memory chips 8 bit data width, which is the most common data width for unbuffered memory. In this case be prepared to spend a bit more time/money in finding inter-module compatibility. Otherwise if trying individual modules (not from the same kit), then there is a possibility of incompatibility between the memory modules due to variance in module characteristics (each module has unique characteristics). With the chipset supporting at least up to 16 GB, but the BIOS supporting up to 8GB only, it is expected that the Intel DG43NB motherboard should, in theory, support up to 8 GB of system memory (using 2 x 4 GB DDR2 modules).įirst, if getting 4 GB modules for testing, preferably get both modules from the same dual channel kit to ensure that the modules are compatible with each other. Later versions of BIOS do not appear to have increased memory capacity further (to 16 GB).

However, from BIOS version 0060, the notation " Set SMBIOS type16 max memory capacity = 8GB." indicates that the system memory limit has been increased to 8 GB. Intel may have only had lower density memory chip modules available at the time of testing and of publishing the limitation of 4 GB for system memory. However, the system BIOS may limit the amount of memory that is accessible to the system.įrom the "official" specification at Intel here, it suggests a memory limit of 4 GB, but is "dependent on memory type" (probably memory chip density related). The integrated memory controller within this chipset supports at least 16GB. The Intel motherboard DG43NB uses the G43 chipset.