![]() For comparisons sake, current Xeon processors have a 40-bit address bus, which enables those chips to address 1TB of memory, or 2TB in a 2-processor setup based on a NUMA architecture. ![]() With a single byte being the smallest addressable unit, that means we can address 2 36 bytes, which happens to be a total of 64GB. ![]() The thing is, these Core i7 desktop processors actually have a 36-bit address bus. That was some Gigabyte mainboard if I remember correctly, but don’t quote me on this. And there were also people who said that it did work, but they only got 32GB shown in BIOS and within their operating system, Windows 7 in that case. Some others said they tried and got no POST at all (black screen on boot), some tried on my own mainboard (Edit: An ASUS P6t Deluxe) and succeeded while others claimed it’s impossible. Still, I found a very few people on the web who claimed that they tried 48GB and that they had it working just fine. Just not the full amount of 6×8=48GB, so you should only be able to plug in either 6×4GB or 3×8GB for a 24GB maximum. On the best of desktop mainboards there are 6 DIMM sockets for the triple-channel setup, and 8GB modules are actually possible. According to Intel specification, the IMC (internal memory controller) of the CPU will only support 24GB of memory, and the same is stated in X58 chipset specifications. Not Xeons on server chipset platforms, mind you, but regular Core i7 on X58. And that’s the memory limit of socket 1366 processors. There is something that got on my nerves just a tiny little bit.
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