CPU temperature, Overclock (tips) thoughts etc.
CPU temperature, Overclock (tips) thoughts etc.
My current computer setup includes the following details:
- Motherboard: Asus Maximus X Hero 1151socket
- Graphics Card: GeForce GTX 1070 8GB Fabric OC
- CPU: Intel Core i7-8700K 3.7GHz ( @4.8GHz OC )
- CPU cooler: Corsair Hydro H115i PRO RGB
- Memory: Corsair Vengeance RGB DDR4 3600MHz ( @3733MHz OC ) 16 G
- Main hard drive: Samsung 970 PRO 512GB PCIe M.2 SSD
- Secondary hard drive: Corsair Performance Pro 240GB SSD
- PSU: Corsair HX750, 750W PSU Platinum
- OS: Windows 10 Pro 64bit
During this overclocking stage, my 8700k requires approximately 1.320V to achieve stability at P95 and OC levels, as well as in OC tests. I can also hit a 4.7GHz clock at 1.295V.
The Cinebench results are around 1530-1545 with a 4.8GHz clock, while at 4.7GHz I reach approximately 1497.
This difference is noticeable; is it excessive or problematic?
Regarding the 4.8GHz overclock, I experience temperatures between 75-81°C during stress tests lasting 4-10 hours. In normal gaming sessions, I rarely exceed 68-72°C, dropping to 50-64°C during gameplay.
I’m curious whether this is safe for continuous use, even though I typically run my PC for 6-12 hours daily.
I’ve tried overclocking beyond 8 hours and both setups remained stable with AVX=0, VCIOO=1.10, and VCSAA=1.15.
My RAM has a CL of 18.19.39 timings; I use the same settings on my 3733MHz chip and haven’t encountered any memory errors during extensive tests.
Additionally, to push for a 5GHz overclock, I’d need at least 1.35V, but I’ll cap it at 4.8 due to chip limitations.
If you ask me about your temperatures, they’re fine at 4.8GHZ, staying below 85 degrees and stable in a prime95 environment is a win. If your average game temps are under 70 degrees, I wouldn’t be too concerned. The extra 100MHz needs a bit more voltage, which some think could affect your CPU, but my quick research on Coffee Lake shows Intel suggests keeping it below 1.52 and most overclockers recommend under 1.40 or 1.45, so you’re in the safe zone. I’d probably even aim for 4.9 if I can maintain voltage under 1.40 and keep temps stable.
Not to worry.
Your temperatures are acceptable and your voltage is fine.
Your ability to handle OC depends mainly on the quality of the chip you get.
As of 3/22/2018
What percentage of I7-8700k chips can OC at an aggressive vcore near 1.4 or higher, with a delidded processor?
Results: 4.9 99%, 5.0 88%, 5.1 54%, 5.2 22%.
Remember the 1.4v is the upper limit, and a delidded chip will affect heat levels.
Your biggest constraint should be voltage.
Don’t exceed what you’re comfortable with.
Higher vcore raises temperatures.
85°C during a stress test is acceptable.
The chip may slow down or shut down if it senses dangerously high temps—around 100°C.
You might have more room, but do you really need it?
An I7-8700k is already powerful at stock settings.
How much above 4.8 do you truly require?
I’d prefer to leave it alone.
Not to worry.
Your temperatures are okay and your voltage is fine.
Your OC performance depends mainly on the luck of getting a solid chip.
As of 3/22/2018
What percentage of I7-8700k chips can OC
at an aggressive vcore near 1.4 or so and delidded
4.9 99%
5.0 88%
5.1 54%
5.2 22%
Keep in mind the 1.4v should be the upper limit, and a delidded processor will affect temps.
Your first constraint should be voltage.
Don’t exceed what you’re comfortable with.
Higher vcore raises temperatures.
85c during a stress test is acceptable.
The chip may slow down or shut off if it senses a high temperature.
Around 100c is typical.
I think you have a bit more room, but really do you need it?
An I7-8700k is already powerful at stock settings.
How much above 4.8 do you truly require?
I’d leave it alone.
This is the main point. I agree with all this, and when I suggested going further I wasn’t implying it would give a noticeable performance gain or anything like that. My usual approach is to push to the limit, but there’s no strong reason to do so especially with a 1070.
Not to worry, everything looks good. Your temperatures are stable and your voltage is within range. Your oc performance mainly depends on getting a solid chip. As of March 22, 2018, the percentage of I7-8700k chips that can handle an aggressive vcore near 1.4 with a delidded processor is around 99% for 4.9, 88% for 5.0, 54% for 5.1 and 22% for 5.2. Remember the 1.4v is the upper limit, and a delidded chip will affect temps more. Your main constraint should be voltage—stay within what you're comfortable with. Going higher increases heat, which can cause the processor to slow down or shut down if it reaches dangerous levels (about 100°C). You might have more headroom than expected, but really you don’t need it. The i7-8700k already performs well at stock settings. How much above 4.8 do you think you need? I’d rather leave it as is. This advice matches what I gave before. When I mentioned pushing it further, I wasn’t suggesting it would give a noticeable performance gain or FPS improvement. My preference is to stay within limits; there’s no strong reason to go beyond that with a 1070. I wish I could have had a 1080Ti or an RTX2080Ti, but the budget cuts me off.
8700k delivers running at 5.3 GHz using an AVX offset of 2 at 1.42 Vcore, 5.0 GHz with AVX offset 1 at 1.35 Vcore, and 5.0 GHz with no AVX offset at 1.23 under full load temperatures reaching 60°C.
I couldn't believe I received it from Amazon just three weeks ago, didn't think they were still producing quality items lol