Secure continuous overclocking and stable temperatures for the I7 4790K.
Secure continuous overclocking and stable temperatures for the I7 4790K.
i7 4790K paired with Phanteks PH-TC14PE.
Setting the voltage manually is a bit tricky, but I found it easier than I thought.
I've reached an overclock of 4.7 Ghz and it's stable after an hour with Prime95.
Temperature readings were: 78 #0, 80 #1, 80 #2, 72 #3.
Power usage came in at 122.29 watts, which is about 38% above the TDP of 88.
My concerns are:
- Is this a safe overclock for continuous use? I prefer not to deal with voltage offsets, but I need to know if this long-term setup could harm the chip.
- Is the PH-TC14PE functioning correctly? I expect temperatures to stay within normal ranges for Prime, ideally not exceeding 75-78°C.
Appreciate any advice!
In summary, keeping BIOS settings and temperature steady:
(1) Core temperature measurements match between Core Temp and HWMonitor.
(2) Vcore values between Core temp and CPU-Z differ from HWMonitor readings.
(3) Core temperature data from Real Temp, Core Temp, and HWMonitor align.
This suggests HWMonitor may be inaccurately reporting Vcore, raising doubts about the processor’s wattage being correctly sent through the motherboard’s I/O chip. In short, watts depend on volts multiplied by amps; if current isn’t measured or calculated properly, power readings could be off. This points toward the motherboard being the likely source of the issue.
If you achieve a score of 4.7 with a vcore of 1.2, you've won the bin lottery.
Most experts agree that vcore voltages above 1.30 aren't ideal for continuous operation.
I haven't found any official guidance from Intel about a safe vcore range.
Setting up speedstep (C1E) would help reduce the multiplier and voltage when the CPU is idle.
This topic is quite confusing, and the terminology varies across different motherboard BIOS versions.
I've stopped using prime95 as a stress tester because I can't remove it easily, and it bothers me.
I prefer OCCT, which seems more reflective of typical usage.
It will terminate the test at 85°C.
MisterSprinkles shared their observations and concerns about the system performance. They noted unusual behavior when operating at 122W with a voltage of 1.2V, suggesting possible issues with airflow or cooling efficiency. They mentioned a recent crash during Prime95 testing after taking a screenshot, which was stable otherwise. The user increased the Vcore to 1.225 and expected better airflow, but found discrepancies between HWMonitor, RealTemp, and CPU-Z readings. They highlighted a significant difference in reported Vcore values (1.248 vs 1.223) and expressed confusion over the high power consumption, especially with only a small voltage increase. They also offered to share BIOS settings if helpful.
jordan1794, Let's make sure we cover the essentials—what version of Prime95 are you using? Blend or Small FFT? What's your current temperature? Are you updating your BIOS? Have you checked this before? Intel Temperature Guide -
CompuTronix: jordan1794, Let's make sure we cover the essentials—what version of Prime95 are you using? Blend or Small FFT? What is your current ambient temperature? Are you updating the BIOS? Have you checked this before? Intel Temperature Guide - I’m quite familiar with that guide, probably read it multiple times (a bit worried about temperatures, you know!). I’m running the prime version mentioned, with small FFTs. The ambient temperature is roughly 22 to 24 degrees. We’re using the latest BIOS. But I’m not satisfied with how my BIOS managed my voltages when set to auto mode:
Thank you for the details.
The 122 watts figure seems elevated for a Vcore of 1.248. There might be several factors involved, but it seems to align with Vcore adjustments.
My i7 4770K is O/C'd to 4.7 at 1.280 volts (adaptive) with 114 watts at 76°C (22°C ambient) using Cooler Master TPC 812 (Dual 77 CFM fans) directly on the processor die.
Be aware that ambient temperature is a small factor. Higher ambient means greater resistance, which can raise wattage.
Check Core Temp to compare with readings from HWMonitor.
CompuTronix :
Thank you for the details.
A 122 watt rating seems elevated for a Vcore of 1.248. There might be several factors at play, but it seems to align with the Vcore value.
My O/C is 4.7 at 1.280 volts (adaptive) with 114 watts at 76°C (22°C ambient) on air using Cooler Master TPC 812 (Dual 77 CFM fans) directly on the processor die.
Check Core Temp to compare wattage with HWMonitor. Let's see the numbers.
In short, the results are essentially consistent.
In summary, maintaining the same BIOS settings and stable room temperature leads to consistent readings: (1) Core temperature and power consumption match between Core Temp and HWMonitor. (2) Vcore values align with Core temperature and CPU-Z, but differ from HWMonitor. (3) Core temp data from Real Temp, Core Temp, and HWMonitor coincide. This suggests HWMonitor may be inaccurate in reporting Vcore, raising doubts about the motherboard's wattage readings. Essentially, watts should equal volts multiplied by amps; if current measurement or calculation is off, power output could be wrong. This points toward the motherboard possibly being the source of the issue. In short, your temperatures and Vcore seem reasonable, so the wattage data likely needs correction. Just keep track of this and keep using your system.