What is the voltage of the 8700k stock core?
What is the voltage of the 8700k stock core?
using prime95 26.6 shows normal temperatures. however, when i run it with avx and no offset under more than 1.3v, it quickly reaches mid to high 90c (one core even hits 100c). that's why i usually stop it immediately. when i try prime95 with avx at 4.8ghz around 1.25v, the temps stay near 85c.
I'd like to try a larger AVX offset during the overclock. Could you share the VCore readings and temperatures without using AVX for your testing?
Maybe not focusing on the main topic but as some individuals have begun discussing temperatures and overclocking, here are my thoughts.
I performed delid/relid on my i7-8700k. Switched to Coolaboratory Liquid Ultra paste and maintained the same components between the Arctic Freezer 240 and heatspreader.
My observations with prime95 (AVX) were:
@4.9GHz 1.30V 22C ambient: peak core temp reached 59°C (37°C difference – excellent) 9.2% boost over original specs
@5Ghz 1.36V 22.5°C ambient: peak core temp hit 68°C (45.5°C difference) 11% improvement compared to stock
I chose 4.9GHz because an additional 1.8% gain with a 9°C increase seemed unlikely to be worthwhile.
Delid/relid definitely worked well. My next target will be the i7-7700K, which is currently struggling with temperatures... Also, I acquired a superior thermal solution from Thermal Grizzly – Conductonaut.
If anyone is interested, I can offer delid/relid services at a fair price. Of course, it carries some risk since it’s not a fully automated process, but there are always potential issues involved.
It varies by motherboard, but my ASRock model uses the default 1.28V. I wouldn't exceed 1.3V for non-AVX tasks and 1.32V for AVX tasks. Some say voltage doesn't matter as long as temperatures stay low, but higher voltages speed up wear over time. Anything near 1.4V could be risky for continuous use.
I'm in the same ballpark as others with i7 8700K who have boosted them. I could push overclock further and likely hit 5.1 "if" I upgraded my case and added a dual or triple fan AIO CPU cooler.
My preference has always been the Noctua D15 Air Cooler for its quiet performance and efficiency. I use both fans—one at the end and one in the middle of the large D15 unit. I can also fit a compact 32GB Corsair 3000Mhz RAM.
Here are my details:
https://valid.x86.fr/g1a479
https://www.userbenchmark.com/UserRun/11941055
If I opted for a big CLC I would easily hit 51 but why do it? The boost speed setting is 4.5, I believe using the AI Tweaker in UEFI BIOS then adjusting the memory from 2800 to around 3000 and achieving a 4.9 (about 400Mhz increase) is sufficient for speed. I must admit the Noctua D15 is extremely quiet with dual fans between the heatsinks, doing an excellent job. I no longer need Closed Looped Coolers and have used them for 12 years.