4770k stock cooler performs well under extremely high temperatures.
4770k stock cooler performs well under extremely high temperatures.
Not much change expected. The device has been running for three years without any signs of wear. I expect it to last several more years after a Kaby-Lake/Z270 upgrade, which should provide a solid four or more years. I'm excited about the performance improvements from M.2 slots, USB 3.1, and Thunderbolt 3.
classna :
4.2 ghz at 1.3v safe for continuous use as long as temperatures stay under 85c load? Wouldn't that shorten the lifespan of your CPU?
I think 1.3v is near the highest practical Vcore setting.
My son is gaming on an overclocked machine that's seven years old... if you want his CPU to remain functional for a longer time, you might opt for 4.1Ghz at 1.25V.
Once the water cooler was restarted, the system at 4.1Ghz and 1.25V peaks reached about 70°C while maintaining an average of 65°C during the Intel Extreme stress test. I only ran it for 15 minutes, but I plan to extend it by another 2 hours. If it stays stable, should I keep using 4.1Ghz and end here?
When targeting 4.2ghz, you need to increase your vcore to 1.3v, though it's not something you're very confident about. I also attempted 1.28v but the system crashed after a short stress test.
classna :
When targeting 4.2ghz, I need to boost my vcore to 1.3v, but it feels a bit risky. I previously used 1.28v, though it failed after hours of stress testing. Have you adjusted any other voltages? As the core voltage rises, the VIN should also increase accordingly. For 4+Ghz, aim for at least 1.7, and around 1.8 for 4.3Ghz.
My motherboard's default vcore was 1.27 for my 4790K. With a Cryorig R1 cooler I'm now at 4.6 with 1.22 volts, cooling at 72C while running OCCT. It's like comparing Red Delicious to Granny Smith... The i7-4790k doesn't have the strange temperature and stability issues that the average i7-4770k does. Devil's Canyon is essentially a binned chip with improved thermal paste between the IC and the heat spreader. I'm still thinking about whether to open mine or just run delidded.
Eximo :
If I aim for 4.2ghz, I need to boost my vcore to 1.3v, but I’m not quite sure about it. I previously tried 1.28v, though it caused the system to crash after a short stress test. Have you adjusted any other voltages? As the core voltage increases, the VIN should also rise accordingly. For 4+Ghz, aim for at least 1.7, and around 1.8 for 4.3Ghz and beyond. I once set my VIN to 1.9v, but it didn’t help stabilize the system, so I’m back to the default 1.7ish. Currently, my setup runs stable at 4.1Ghz with 1.25v. I ran Realbench and IETU for two hours without exceeding 70°C, with a few spikes up to 72°C. I’ve since switched to adaptive vcore with turbo at 1.25v to take advantage of Hasewell’s power-saving features. I plan to try the VIN again and see if I can push it to 4.2 or even 3.