Task manager shows it maintaining 3.5ghz or higher, then dropping to 2.5ghz ish and then coming back up again.How do you know it throttles?
It is a laptop.Specs?
Is this a new build (partial/whole)?
What does the performance limit section look like?Your CPU is most likely hitting some thermal/power limit and throttling back. Load up HWiNFO64 (sensors) and let it run in the background while you game. After you experience some performance dips, exit the game and look at the performance limit reasons section in HWiNFO64.
The events that seem to light up under performance limit are: Power, Reliability Voltage, Max Operating Voltage