[HELP] FPS Fluctuating Intel HD 4000

Hey Guys,

Got a nice new Ultrabook about 2 weeks ago Acer Aspire S3-391 with an i5 3317U (HD 4000 GPU) trouble I am having is in any game no matter how complex I get weird FPS drops. It would be smooth then drop every second, like 40FPS drop to 20FPS then back up every second without fail even with lowest graphics details set etc.

Can anyone explain this to me please?

I am running Windows 8 Pro x64 but had same problem on Windows 7 x64, tried various drivers and obvious fixes. The only thing I see connected with this issue is the Turbo Boost, looking at the monitor it shoots up and down in the same rate as in game, could this be the issue?

Thanks.

Found this tool 'ThrottleStop' seems to have solved the issue by turning Turbo Boost off and keep the multiplier instead. Get it here: http://www.xtremesystems.org/forums/showthread.php?227689-ThrottleStop-Performance-Adjustment-Tool-for-Core-2-Core-i-CPUs

Thanks. :)

you should also enable software vertex proccessing in the intel graphics properties

Don't have that option on my laptop.