Technical Help Needed: Adding Dual 6700XT to Ryzen 9 5950X on X570 Motherboard - Max PCIe Lane Confusion

2023-03-25 07:49:24 By : Ms. Jay Wong
planning to add two <a href='/6700xt/'>6700xt</a> to 5950 + x 570 mboard ... - AMD Community

If you are planning to add dual 6700xt to your Ryzen 9 5950x in X570 mboard, you might be confused about the maximum PCIe lane supported by the 5950. Let's dive into the technical details to help you understand if it's possible and what you need to keep in mind.

Firstly, let's understand what PCIe lanes are and how they work. A PCIe (Peripheral Component Interconnect Express) lane is a high-speed serial connection that links various computer components, such as graphics cards, network cards, and storage devices, to the motherboard. The more lanes a system has, the more devices it can accommodate, and the faster the data transfer rates.

The Ryzen 9 5950x supports up to 24 PCIe 4.0 lanes, which is plenty for most users. However, adding dual 6700xt graphics cards can require significant bandwidth and might need more PCIe lanes. The good news is that the X570 motherboards, which are compatible with the Ryzen 9 5950x, provide plenty of PCIe lanes to work with.

The X570 motherboards come with various configurations for PCIe lanes, depending on the motherboard manufacturer and model. Some X570 motherboards have up to 40 PCIe lanes, while others have around 24 lanes. Therefore, you should check your X570 motherboard's manual to determine how many PCIe lanes it has and how many are available for use based on the components you plan to install.

planning to add two 6700xt to 5950 + x 570 mboard ... - AMD Community

When you install two PCIe 4.0 graphics cards, each card will need x16 lanes, which adds up to 32 lanes in total. Nonetheless, most motherboards provide an x16 configuration for the graphics card in the primary PCIe slot and an x8 or x4 configuration for the secondary slot.

As such, when you install two graphics cards, you will most likely have one x16 slot, and the second slot will operate at x8 or lower, depending on the motherboard configuration. Keep in mind that if you use a lower lane configuration, you might experience reduced performance, although it might not always be significant.

To sum up, if you want to add dual 6700xt graphics cards to your Ryzen 9 5950x in X570 mboard, you need to ensure that your X570 motherboard can support it. Check your motherboard model's manual to see how many PCIe lanes it has, and ensure that your graphics cards fit within these specifications. Also, ensure that your chosen configuration does not impact system performance.

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