![]() ![]() Since your PCI-e x16 slot is wired to 4 PCI-e lanes, your SSD will have all four lanes that it needs for full speed. If the SSD you mention in your original post says that it requires a x4 connection, that is because it can communicate using up to 4 PCI-e lanes. A x16 slot wired as a PCI-e x4 has 4 PCI-e lanes wired to it and is electrically equivalent to a x4 slot, but can physically accept x16 cards.Ī x16 card in a x16 slot that is wired as a x4 slot will operate in x4 mode.Ī x4 card in a x16 slot that is wired as a x4 slot will operate in x4 mode. ![]() A full x16 slot has 16 PCI-e lanes wired to the slot. It sounds like you misunderstand how PCI-e works.Įach slot is wired with a given number of lanes. A single x16 add-in board slot on a motherboard that is wired as a x4 has 4 PCI-e lanes wired electrically to the slot. A single, fully wired x16 add-in board slot on a motherboard has 16 PCI-e lanes electrically wired to it. I was talking about PCI-e lanes, which are the electrical connections used to carry traffic between the devices on current generation motherboards. Unable to conduct similar tests on AMD hardware.I wasn't talking about 4 PCI-e lanes either. After internal verification, company representativesĬonfirmed that they did not. We asked AMD if it had any API or function that allowed for similar To be unreliable and thus not used internally". Response confirmed that the FB metric measures graphics memoryīandwidth usage, but Nvidia dismissed the BUS metric as "considered We asked Nvidia to shed some light on the inner workings of NVAPI. Which you can trace in EVGA PrecisionX and MSI Afterburner, is called The bus interface ("BUS") metric refers to utilization of the PCIe controller, again, as a percentage.Only see the dial move if you're encoding video through ShadowPlay or We're not as interested in the video engine ("VID") it's not generally used in gaming, and registers a flat 0% typically.Used by the controller, which is not otherwise available as a ![]() If that's correct, it would measure actual bandwidth being It appears, rather, to be the memory controller's utilization Utilization (the percentage of memory used). From the name, you'd expect it to measure graphics memory
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