12th Gen Intel® Core™ CPUs provide up to 16 CPU PCIe 5.0 lanes and up to four CPU PCIe 4.0 lanes, while 11th Gen Intel® Core™ CPUs like the Intel® Core™ i9-11900K provide up to 20 CPU PCIe 4.0 lanes. ![]() They also feature both backward- and forward-compatibility: not only can you connect a PCIe 3.0 SSD to a PCIe 4.0 slot, you could also connect a PCIe 4.0 SSD into a 3.0 slot.Ī key advantage of 12th and 11th Gen Intel® Core™ CPUs is the addition of CPU PCIe lanes following the new standards. On the surface, newer PCIe slots look the same as 3.0. (The bit rate is measured in gigatransfers to show the theoretical max speed before encoding-realized speeds may be slower.) While PCIe 3.0 had a data transfer rate of 8 gigatransfers per second, PCIe 4.0 transfers data at 16 GT/s, and PCIe 5.0 at 32 GT/s. Modern PCIe m.2 SSDs use x4 lanes.Įach generation of PCIe is twice as fast as its predecessor. GPUs are usually installed in the top x16 slot, as it has the most bandwidth and, traditionally, the most direct connection to the CPU. More lanes mean more bandwidth, as well as a longer slot. On the motherboard, PCIe lanes appear in x1, x2, x4, x8, and x16 variations. ![]() PCIe (Peripheral Component Interconnect Express) is a high-bandwidth expansion bus commonly used to connect graphics cards and SSDs, as well as peripherals like capture cards and wireless cards. ![]() ![]() If you’ve built a PC before, you’ll recognize the PCIe slots running horizontally across your motherboard.
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