Greetings!
I got a problem with my m18x. When I open any game that uses both of my gpu after 5-10 minutes the Frames Per Second drops from above 60 down to around 10 for a few seconds, then it can get ok for about a minute, then the story repeats again and again. If I ALT+Tab out of the game then eventually it will turn to normal FPS and it will repeat the cycle. And it doesn't matter what graphic settings I use, high, mid or low - always the same. I've checked my temperature while playing: 1st gpu is running about 72-75C, 2nd about 58-68C, CPU - 60-95C. All coolers are working properly, I even use a cooling stand. I have checked absolutely different games, from Battlefield 4 to pretty old stuff like Dragon Age 1 - all the same. But when i turn the sli mode off - it gets ok. And btw my CPU never gets 100% busy, only 10-25%, which is weird. Even if 95C+ still 10-25% busy. According to the diagram seems like the 1st core always perform about 100% while the rest cores stand pretty idle.
And another thing, my gpu gadget shows fan -1% on the 2nd gpu (100% on the 1st one) and I can't control this fan manualy through HWiNFO64 for example. But still, I've checked that both of them work
UPDATED: I think I have discovered that the fps goes down right after my second gpu hits 75C
Intel i7 2960xm 2.70
nvidia GTX 580m sli
16gb memory
the latest version of bios