Yes, some motherboards offer M.2 slots designed to preserve bandwidth for your graphics card.
Yes, some motherboards offer M.2 slots designed to preserve bandwidth for your graphics card.
Hey there! I'm looking into my upcoming build and wondering about motherboards with M.2 slots that won't interfere with graphics card performance. From what I've heard, Linus mentioned they often share the same PCI lane and can limit each other's speeds. Is that accurate? Are there options that work around this issue? You might find clues in the label markings on the board itself. Thanks for your help!
Typically, most consumer CPUs offer ample PCI lanes to support a 16x graphics card and four M.2 slots. The specific model you intended to purchase is usually mentioned on the manufacturer’s site or in the user manual regarding the PCIe configuration.
They usually come with M.2 slots on most chipsets. Most boards include them, I believe.
It's a CPU matter that connects to the motherboard, as the board is designed for certain CPU brands—Intel or AMD. Consumer Intel chips offer 16 PCIe lanes for the CPU. AMD Ryzen chips provide 24 PCIe lanes. This means with Intel you can't pair a high GPU with many NVMe drives since there are only 16 lanes available. With AMD, the extra 8 lanes make it feasible.
Ryzen offers four extra direct CPU lanes over Intel, not eight. The schematic lists 24 lanes, which includes the four from the chipset. When comparing Intel platforms using the same method, the count would be 20 CPU lanes. Additionally, none of the consumer M.2 slots utilize the 16 graphics lanes; they are only accessible via the first two PCI-E x16 ports. Except for the initial M.2 slot on AMD systems, all M.2 connections are linked to the chipset, meaning NVMe drives won't affect graphics bandwidth.