Molex Mini-Fit Jr – Know your Power, and Don’t Get Confused – “PCIe” and “Xilinx Not PCIe” Power Connector

Molex Mini-Fit Jr – Know your Power, and Don’t Get Confused – “PCIe” and “Xilinx Not PCIe” Power Connector Our Mission: If It Is Packets, We Make It Go Faster – today more on PCIe, this time, Powering PCIe Cards with FPGAs… And with packets we mean: Networking using TCP/UDP/IP over 10G/25G/50G/100G Ethernet; PCI Express (PCIe), CXL, OpenCAPI; data storage using SATA, SAS, USB, NVMe; video image processing using HDMI, DisplayPort, SDI, FPD-III. To move packets you need power, but how much can you draw from an interface? PCI Express Cards Consumption Limit PCIe has been around for a long time, since 2003, and many people know the maximum power draw of 75W per PCIe slot, but is it that simple? The short answer is no, but let’s have a look into the spec. It states that all cards can consume up to 3A on the 3.3 V power rail with the following restrictions applying: x1 cards: 0,5A on 12V, but overall consumption limit is 10W x4 – x16 cards: 2,1A on 12V, but overall consumption limit is 25W  But where does the 75W come from? Well, exceptions apply: High power devices can draw more power after the initialization and configuration: x1 cards can consume 25W  x16 cards can consume 75W Using
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