Yes, we fully support buffers.
Yes, we fully support buffers.
Hi, I'm trying to grasp how Full Buffer memory works in RAM. I know it's similar to ECC, but the details are a bit unclear. In the AMD Ryzen 3000 and 2000 series, the motherboards don't support ECC or buffered memory. However, the 5000 series does offer ECC support and mentions dual-channel architecture. It seems the CPU must support ECC, but the motherboard's role is unclear. Regarding buffered memory, it's not always the same as ECC—maybe there are different types. To find out if your system supports full buffer memory, you'd need to check the motherboard documentation or specifications. Let me know if you need further clarification!
AM4 and AM5 only work with UNBUFFERED/UNREGISTERED DDR4/DDR5 without ECC. AM4 means just DDR4, AM5 only DDR5 with ECC, which adds extra RAM chips for error correction. These are supported by AMD, but the motherboard must enable it. Registered or FB sticks are meant for servers or high-end systems like the latest Threadripper, and won't fit Ryzen processors.
It mainly depends on the socket or the CPU itself. For Full Buffer support, it must be compatible with both the CPU and the motherboard. You can check compatibility by looking at the specifications of your motherboard or consulting the manufacturer's documentation.
It varies based on the memory controller and the CPU socket. There seems to be no significant pinout variation between unbuffered and buffered RAM modules, though I can't confirm this completely. Supposing it's accurate, fully buffered RAM sticks wouldn't require additional sockets with extra pins or contacts. These modules include an additional chip that handles signal processing, distinguishing them from standard unbuffered ones, especially when compared to ECC variants. There are also Load Reduced RAM sticks that use a chip between the controller and memory chips. According to Wikipedia, ECC sticks have an extra identical chip for parity storage, which is integrated into the design. The DDR slots are built with connections for this chip, and most makers connect traces from these to the CPU socket pins. This setup is essential because using such space on the motherboard isn't wasted. The controller will select the memory chip automatically, and BIOS commands can enable its use. Intel artificially restricts ECC to server chips, while AMD supports it on "Pro" processors, though they don't guarantee functionality without proper support.
Yes, the support for FB in the socket is mainly determined by the socket itself. The motherboard doesn't require additional components, while CPU support can be achieved using FB or without FB rams.
Typically, a CPU socket is built for specific components, and processors follow suit. When a new feature requires pins or contacts not present in the socket, manufacturers update it. For instance, AM4 is meant for DDR4 only, lacking any extra pins for DDR5, which would create confusion. Buyers might end up with mismatched boards—some DDR4, some DDR5—but not both at once. AMD’s AM5 only accommodates DDR5, while Pro processors support Unbuffered DDR4 with ECC options. Ryzen models without a Pro label work with either Unbuffered DDR4 or ECC, but ECC is officially backed by AMD. Threadripper’s first-gen only supports Unbuffered DDR4 with ECC, and later generations added more capacities and variants like Registered and Load Reduced DDR4. Only the supported type of memory fits the motherboard, and additional features won’t function properly.