When playing league of legends I commonly like to google for statistics, such as [this article](http://gaming.stackexchange.com/questions/181424/how-long-can-a-champion-be-in-stasis) and as such, I play on borderless mode so I can make use of my three screens.  Commonly I can be found playing a game on the central screen, watching a movie ([netflix](www.netflix.com)) on my right screen and either posting on here, or doing other cool things on the left screen.

However, recently I have found that I am getting problems with my FPS dropping to around 15fps while playing all of my games on borderless mode.  These games range from [watch dogs](http://watchdogs.ubi.com/watchdogs/en-gb/home/), to [league of legends](http://euw.leagueoflegends.com/), even to [portal 2](http://www.thinkwithportals.com/).  I am concerned that this was not happening before, and is just happening now.  Is there anything I can do to solve the problem?  I don't' have any problems in proper full screen mode, but it makes going between screens more tricky.

I have a [Nvidia GeForce GTX 690](http://www.geforce.co.uk/hardware/desktop-gpus/geforce-gtx-690) and I am using three screens running on 1920x1080 resolution.  I play all the games at max settings which can be done easily with my [Intel Core i7-3630QM](http://ark.intel.com/products/71459/Intel-Core-i7-3630QM-Processor-6M-Cache-up-to-3_40-GHz) processor.  Any other technical details can easily be added, if needs be put the other stuff I need to put here in a comment.

Thanks in advance,

Popey