Installing add-in cards—like capture cards—can limit PCI-e bandwidth to the GPU. Does the reduction of PCI-e bandwidth harm performance in content-creation?
PCI-Express has been the standard for connecting video cards and other expansion devices inside of computers for many years now, and several generations of the technology have now passed. With each of those generations, the amount of data that can be transferred over the PCIe connection has increased. How much impact does that have on modern video cards? Is there any benefit to running a PCIe 3.0 card in a 4.0 slot, or loss if using a 4.0 card in a 3.0 slot?
With video cards getting faster and display resolutions getting larger, it is time to revisit our PCI-E testing to see if there is finally a performance difference between using a GPU in x8 versus x16.
Many hardware sites have shown in the past that video cards do not show any performance decrease by running in x8 mode and cannot utilize the larger bandwidth provided by the latest Gen3 specification. However, video cards are getting faster and faster so we felt it this is still true. Also, with the gaining popularity of 4k displays, we also felt it was important to see if the PCI-E revision/speed would affect a video card’s performance at the much more demanding 4k resolution.