no swf player will work GeForce GTX 750

I am using -> Gentoo Linux localhost 3.18.11-gentoo #4 SMP Tue Apr 28 05:36:21 EDT 2015 x86_64 Intel® Core™ i7-4790 CPU @ 3.60GHz GenuineIntel GNU/Linux, with a -> VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX 750] (rev a2) and the driver used was installed via -> sh /usr/portage/distfiles/

Video is nice and crisp and clean but I cannot get Flash or any of the open source derivative to play more that a second or two before it crashes and I have to restart the browser to catch 2 seconds again.

Adobe-Flash, Gnash and Lightspark all behave in the same manner. I can get them to install/load error free, but no more than 2 seconds of video.