Hej Folks, at first i´ve to apologize for my bad english, i´m from germany, and i´ve never been that much into english at school - my grammar should not be the finest

I´ve got a very frustrating problem, played Cortex Command on 1280x720 with 0.16 Delta Time on my Old PC smoothly (about 100+fps) ( Core 2 Duo 8300 at 3 Ghz, 4 Gb of Ram, GTX 260)
now i installed the latest build and tried it with all my favorite mods on my new pc (which has definitly more processing power) and it runs much slower - same delta time, same resolution - about 30fps.

My new pc´s specs:
Core i7 2600k @ 3,4 Ghz (Not much overlocking there, but every single core of it should be definitly faster than the Core2Duo)
12 Gigs of DDR3 Ram
GTX570 1,5Gb
SSD 250GB Intel510

I tried some solutions:
turning off all CPU power-saving features like speedstep,eist etc. - does not fix the problem
Running it in window mode - does not fix the problem
running it with higher delta time - 0.02 to 0.04 does not fix the problem either
runnig it in real time/timescaling off - does not fix the problem
runnig it without mods in a clean install - does not fix the problem
the only two thing that fixes the problem for a few seconds:
a. switching to the desktop while playing in fullscreen, than switching back from the desktop - now the game runs smoothly with about 200fps+
b. set the game to run just on one core
but these "fixes" last just for a few seconds in game - then it gets slower till it´s back at 30fps. This happens even on blank maps with just one or two actors.

Hope someone can help me fix that problem.
I don´t know if it matters - but my TFT-Screen runs at 120hz, maybe the game got a problem with that?

I'm not sure whether your deltatime was a typo or not (I hope it was) because a deltatime of .16 would give you about 6.25 fps, the default is 0.0166667 which is 60 fps. I have the same processor, same card but with 1.25GB RAM, 8GB RAM instead of 12 and it runs fine for me. From what I heard, this shouldn't be happening since Cortex Command really likes i7 processors.

jep, it was a typo, i meant to write 0.016
Very weird problem, when i am staring the game in window-mode the problem occurs after about 5-10 minutes, not at the beginning or after a few seconds...

i fixed the problem - in a very untypical way - maybe it doesnt have anything to do with it, but after updating my logitech mouse drivers (have a g400) the game runs just fine. Dont know why.