Overheating issue detected on motherboard 7700k paired with Gigabyte z270N-Wifi
Overheating issue detected on motherboard 7700k paired with Gigabyte z270N-Wifi
Hi guys,
I’ve already overclocked my PC to 4.7ghz @ 1.33v, but I’m still puzzled about why my CPU temperature is throttling. At idle it’s around 32°C, and under load it stays between 75-80°C. However, when Prime95 runs, the VRM temperature spikes to 110°C and drops the core frequency from 4700mhz to 800mhz, which makes the system freeze. It also happens in games where under load it causes heavy stuttering. There are no airflow blockages, and I’ve tested all LLC settings—currently auto mode is used because higher values make temperatures worse, even on my CPU. I’ve also disabled all overclocking, but the temperature still climbs to 110-111°C and throttles the CPU.
Here’s a screenshot of the temperature issue (VRM sensor reading at 5 ohms):
View: https://imgur.com/a/ceilJEq
Thanks!
In Prime95 turn off AVX and AVX2, then execute a small FFT stress test with default settings. This represents a full workload. If AVX is active, it simulates around 130% CPU usage and temperatures will rise significantly. With the cooler, you should still see performance in the low 70s during the test. It seems your overclocking might be too aggressive—check if your OC is optimized or if other parameters like ring, vid, or sa agent are set too high. The Vcore value isn't the only factor to fine-tune.
How long has it been since you last applied thermal grease to the CPU? What cooling technique are you employing at 4.7GHz? Which Prime 95 release are you currently running?
Remove the case cover and blow a small case fan across the mainboard's power regulator (VRM) circuitry... ; AIOs lack fans on the pumps, frequently cutting off airflow to the chipset. Some require it...
CPU temperatures remain stable even at full load, with idle temps between 30-35°C and a maximum of 80°C. The CPU is using a H105i Corsair cooler, while the rest of the system runs on air cooling with three fans front and three at the top. I reset the BIOS to clear all settings, but the voltage was increased to 1.3V to prevent hangs, though it still freezes intermittently.
I might need to test this out, using a thermaltake view71 case with default settings. I’m not seeing any problems in games when VRM temperatures are normal. Last night’s highest I reached was 80 degrees while playing Cod. It seems the system slows down significantly if I try overclocks or add any LLC adjustments. I can’t run Prime95 on stock either—it pushes temperatures up to 110.
In Prime95 turn off AVX and AVX2, then execute a small FFT stress test with default settings. This represents a full workload. If AVX is active, it simulates around 130% CPU usage and temperatures will rise significantly. With the cooler, you should still see performance under @ low 70s during the test. It seems your overclocking might be too aggressive—check if your settings are optimal or if other parameters like ring, vid, or sa agent are being set too high. The Vcore value isn't the only factor to fine-tune.