VoodooRufus
Weaksauce
- Joined
- May 23, 2017
- Messages
- 110
So I got new toys to play with. Gigabyte Aorus Master mainboard, Intel 8086k delidded Silicon Lottery CPU, using a Dark Rock Pro 4 heatsink.
I left everything on auto, set the CPU wattage limit to 250W, and then started jacking up the multiplier. The mainboard automatically ramped CPU voltage depending on the clock rate, pretty aggressively once I got past 4.6GHz. Did some 30-45 minute prime95 runs to test initial stability. I manually played with the fan settings to get a good balance of noise/airflow/temps. After 70C I have the CPU and chassis fans running 100%, which is still a low hum. Anything under 60C is nearly silent.
Anyway, on 5.0GHz I needed 1.32V in bios (LLC set to 6) to get it stable in a short term sense. I had it crash out a few threads after 6 hours. What puzzles me is that depending on the P95 task type, the CPU will either stay nice and happy around 65-70C and a calculated HWMonitor CPU wattage of 150W, or ramp up to 200W and 85-90C (ouch), like a switch. It will bounce between the two every 15 minutes or so. The clocks are not throttling, but the VID drops from 1.35V to 1.28V, while the Vcore maintains at 1.36V.
What's going on here with the temp and wattage switching?
I left everything on auto, set the CPU wattage limit to 250W, and then started jacking up the multiplier. The mainboard automatically ramped CPU voltage depending on the clock rate, pretty aggressively once I got past 4.6GHz. Did some 30-45 minute prime95 runs to test initial stability. I manually played with the fan settings to get a good balance of noise/airflow/temps. After 70C I have the CPU and chassis fans running 100%, which is still a low hum. Anything under 60C is nearly silent.
Anyway, on 5.0GHz I needed 1.32V in bios (LLC set to 6) to get it stable in a short term sense. I had it crash out a few threads after 6 hours. What puzzles me is that depending on the P95 task type, the CPU will either stay nice and happy around 65-70C and a calculated HWMonitor CPU wattage of 150W, or ramp up to 200W and 85-90C (ouch), like a switch. It will bounce between the two every 15 minutes or so. The clocks are not throttling, but the VID drops from 1.35V to 1.28V, while the Vcore maintains at 1.36V.
What's going on here with the temp and wattage switching?