Why 50 hz refresh rate and fxaa is enabeled whem fsaa is level 4, i think that does not work when fsaa is selected.
50hz refresh is the way RF2 interprets my Dell Monitors 60hz setting which is actually 59.973hz so windows (Win10-64b shows 60hz setting) passes it on as not a true 60hz. I have forced RF2 to set 60hz (didn't change my fps any), but every RF2 update usually changes it back to 50hz setting. I have checked the Actual frame rate in game and it shows 60fps max cannot do more with this monitor (it does not OC either) Video card is rendering more hence the 80fps+, but monitor will only do 60fps. See below from MS Support:
Certain monitors report a TV-compatibility timing of 59.94Hz. Therefore, Windows 7 and newer versions of Windows expose two frequencies, 59Hz and 60Hz, for every resolution that is supported at that timing. The 59Hz setting makes sure that a TV-compatible timing is always available for an application such as Windows Media Center. The 60Hz setting maintains compatibility for applications that expect 60Hz.
In Windows 7 and newer versions of Windows, when a user selects 60Hz, the OS stores a value of 59.94Hz. However, 59Hz is shown in the Screen refresh rate in Control Panel, even though the user selected 60Hz.
P.S.
A little history: Way back in the day when the CRT telly was a new and shiny thing, capacitors were expensive and voltage regulators were very expensive. Locking the field rate of the telly cameras to the mains frequency meant that ripple on the power supply due to poor regulation and undersized filter caps in the receiver would cause brightness variations, but that they would be more or less static over time, doing anything else caused very annoying rolling brightness on the display as the supply voltage and scan position beat together.
This of course gave rise to 60Hz frame rates in the US and 50Hz just about everywhere else.
Then colour arrived on the scene and we got another weird split, with the US slightly breaking things by going to 59.97Hz (Due to the way they decided to encode the croma subcarrier), while everyone else stayed on 50Hz.
When computer monitors moved from expensive vector displays to use what were basically repurposed TV technology 50 and 60Hz stuck around (only now we run them non interlaced as a frame rate rather then a field rate).
More than we ever wanted to know


