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CPU gets locked at 800MHz?

When using Sony Vegas pro 13, cpu goes at 4.0-4.1 GHz and when I leave it, it goes down and locks at 800MHz while the video render is at 80%. Temps go max to 71C when it's at 4GHz - no trottle.

What can i do to re-activate the 4GHz without restarting my pc. I turned all power saving options off.

Intel Core i9-9900K | Asrock Phantom Gaming miniITX Z390 | 32GB GSkill Trident Z DDR4@3600MHz C17 | EVGA RTX 3090 FTW3 Watercooled | Samsung 970 EVO 1TB M.2 SSD | Crucial MX500 2TB SSD | Seasonic Focus Plus Gold 1000W | anidees AI Crystal Cube White V2 | Corsair M95 | Corsair K50 | Beyerdynamic DT770 Pros 250Ohm

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Get throttle stop, it can stop all kinds of throttling except thermal ones, look it up, you could even lock your cpu into full turbo boost, its probably got something to do with clock modulation which stops your cpu for like a millisecond, kind of how the pentuim 4 thermal throttled

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