Nvidia G-Sync

The module carries all the functional parts. It is based around an Altera Arria V GX family FPGA featuring 156K logic elements, 396 DSP blocks and 67 LVDS channels. It's produced on the TSMC 28LP process and paired with three DDR3L DRAM chips to attain a certain bandwidth, for an aggregate 768 MB capacity. The employed FPGA also features a LVDS interface to drive the monitor panel. It's meant to replace common scalers and be easily integrated by monitor manufacturers, who only have to take care of the power delivery circuit board and input connections.

• GPU: G-Sync features require an Nvidia GeForce GTX 650 Ti Boost GPU or higher.
• Driver: R340.52 or higher.
• Operating System: Windows 7, 8, 8.1 and 10. Linux, FreeBSD, Solaris.[5]
• System Requirement: Must support DisplayPort 1.2 directly from the GPU.[6]

G-Sync faces some criticism due to its proprietary nature, and the fact that it's still being promoted when free alternatives exist, such as the VESA standard Adaptive-Sync which is an optional feature of DisplayPort version 1.2a.[7] While AMD's FreeSync relies on the above-mentioned optional component of DisplayPort 1.2a, G-Sync requires an Nvidia-made module in place of the usual scaler in the display in order for it to function properly with select Nvidia GeForce graphics cards, such as the ones from the Kepler microarchitecture (GTX 650 Ti Boost and later).

[8]

Nvidia announced that G-Sync will be available to notebook manufacturers and that in this case, it would not require a special module since the GPU is directly connected to the display without a scaler in between. According to Nvidia, fine tuning is still possible given the fact that all notebooks of the same model will have the same LCD panel, variable overdrive will be calculated by a shader running on the GPU, and a form of frame collision avoidance will also be implemented.[4]

At CES 2018 Nvidia announced a line of large gaming monitors built by HP, Asus and Acer with 65-inch panels, 4K, HDR, as well as G-Sync support. The inclusion of G-Sync modules make the monitors among the first TV-sized displays to feature variable refresh-rates.[10]

At CES 2019 Nvidia announced that they will support variable refresh rate monitors with FreeSync technology under a new standard named G-Sync Compatible. All monitors under this new standard have been tested by Nvidia to meet their baseline requirements for variable refresh rate and will enable G-Sync automatically when used with an Nvidia GPU.[11] However, users with any Freesync monitor, including those that are not officially certified may choose to enable the G-Sync option in the Nvidia Control Panel.[12]

• Variable refresh rate
• FreeSync
• Refresh rate

• Nvidia G-Sync overview