![]() Pigtail PCIe CablesĪ PCIe pigtail connector is a split cable that connects to the power supply unit on one end and then separates into two equal connectors.įor instance, the cable above is an 8-pin pigtail cable. ![]() These may need an adapter since many PSUs lack the 12-pin output connector.Įach cable with 12 pin connector can provide from 500-600 watts of power depending upon the wire gauge of the line. This is used by some of the newer cards, like the lineup from NVIDIA’s RTX 3000 series. This one is more modular and can be used on both 8-pin and 6-pin cards (as seen in the guide above). The other comes as a 6-pin module with an extra 2-pin attachment. You can get one that has a single 8-pin connector in one terminal. With eight pins, you can run more intensive cards that draw more power from the system. It can supply up to 150W from the 12V rail on the PSU to the graphics card. The 8-Pin connector is typically found on cards with high power requirements. So if your graphics card has power requirements of anywhere greater than 75 watts to 150 Watts max, you will likely need one 6-pin PCIe cable.įor graphics that consume 150 watts of power, 75 watts will come from the PCIe x16 slot and another 75 from the 6-pin cable. This is the most common connector used by many low to mid-range cards. The 6-Pin connector can provide up to 75 watts of power. Hence the additional two pins will be useless in this case and will not be utilized. ![]() Instead, it requires two separate 6-pin PCIe cables. However, my graphics card does not have a dedicated slot for an 8-pin cable. A 6+2 pin cable can power an 8-pin slot on a graphics card. However, when inspecting my power supply, I see that it has 2 x 6+2 PCIe Cable connectors: This image shows 2 x 6+2 pin cables.Ī 6+2 Pin PCIe cable has a single sizeable 6-pin connector and an additional 2-pin split if you need more power. The graphics card above requires 2 x 6 pins. Visual Guide for PCIe Cables and Connectors This image shows a graphics card with 2 x 6 Pin Slots. The rest of the standard expansion cards, like a video capture, network adapter, sound card, USB hub, etc., do not require a PCIe cable. If you have two NVIDIA RTX NVIDIA 3090 installed, you will need 6 x 8-pin cables. Starting from mid to high and extreme range, you may find cards that need as low as a single six-pin PCIe cable to 3 x 8-pin lines on the likes of NVIDIA RTX 3090. This weak graphics card receives its power supply from the PCIe slot itself. The number of PCIe cables you need primarily depends on the type and amount of installed graphics cards.įor instance, some graphics cards, like the NVIDIA GT 710, do not require a PCIe cable. They are used by demanding graphics cards. ![]() What are PCIe cables? PCIe cables are separate power cables from the Power Supply Unit. Adding More PCIe Cables and PCIe Cable Adapters.Cables and Graphics Card Maximum Power Consumption.Let us explore this topic a bit further below. Then, you must provide it with 2 x 8 Pin PCIe cables from the Power Supply Unit. Suppose your graphics card has 2 x 8 PIN requirements. The answer to this question is a resounding YES! It would need all the pins connected for the graphics card to work. You also often hear people ask if all the pins on the graphics cards need to be connected. Often you will hear complaints regarding graphics cards not working or not even initializing. Instead, they come packaged with power supply units. PCIe power cables do not come packaged with graphics cards. However, some features, particularly the graphics cards, need much more power than your average add-in cards, like network adapters, SATA expansion or video capture cards, etc.Īs such, you need to calculate how many PCIe cables you need before purchasing the correct power supply unit. Usually, their power for smaller and weaker cards comes from the PCIe slot itself. PCIe components need to be powered, just like any other component on the motherboard. Depending on your GPU, this could mean a single 6-pin line to 3 x 8-pin cables on powerful cards like the NVIDIA RTX 3090. Having as many PCIe cables as your graphics card needs would be best.
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