cases where two cards are not identical, the faster card – or the card with more memory - will run at the speed of the slower card or disable its additional memory. (Note that while the FAQ still claims different memory size support, the support has been removed since revision 100.xx of Nvidia's Forceware driver suite.) SLI does not always give a performance benefit – in some extreme cases, it can lower the frame rate due to the particulars of an application's coding. This is also true for AMD's CrossFire, as the problem is inherent in multi-GPU systems. This is often witnessed when running an application at low resolutions. Vsync + Triple buffering is not supported in some cases in SLI AFR mode. Users having a Hybrid SLI setup must manually change modes between HybridPower and GeForce Boost, while automatically changing mode will not be available until future updates become available. Hybrid SLI currently supports only single link DVI at 1920×1200 screen resolution. When using SLI with AFR, the subjective framerate can often be lower than the framerate reported by benchmarking applications, and may even be poorer than the framerate of its single-GPU equivalent. This phenomenon is known as micro stuttering and also applies to CrossFire since it is inherent to multi-GPU configurations. With the new RTX 20xx series of graphics cards as launched in 2018 the interconnect is no longer SLI HB. These newer cards are using NVLink as its communication base and require either a 3 slot long or 4 slot long NVLink bridge - reasoned partially by thermal considerations and by socket availability. As of now only two GPU cards can be connected with NVLink; three-way, four-way and quad are not possible using NVLink bridges even if NVLink by principle is a very versatile interface. As of the GeForce RTX 3000-series, SLI has been effectively replaced with NVLink. Eventually, for the 40 series; this port was also dropped, officially marking the end of the era of multi-GPU solutions in the consumer field. See also Scan-Line Interleave by 3Dfx AMD CrossFireX – AMD's competing solution MultiChrome Micro stuttering Conventional PCI Intel Xe Link NVLink Bridge - newer technology for connecting pairs of GeForce RTX 20 series cards, based on NVLink interface. Multi-chip module (MCM) References External links Nvidia products Graphics cards