8700K on auto voltage
8700K on auto voltage
Hi everyone,
I recently purchased an 8700k with a performance range from 3.7 up to 4.7 turbo across all cores. My goal is to push the overclock to 4.7 GHz on every core.
My approach is to turn off turbo and MCE, set all cores to sync, and raise the multiplier to 47.
I previously upgraded from a 6700k by using the same base and reaching its maximum turbo (4.2 GHz per core). I achieved this by leaving auto Vcore on.
Now I’m wondering: with the 8700k’s six cores, will auto Vcore still be enough to keep all cores running at full speed? If not, what voltage and liquid cooling solution would you suggest?
Before suggesting a target of 5 GHz, I want to clarify that I prefer using auto Vcore because I’m less confident with manual settings. I usually just lock my CPU to its maximum turbo, which seems sufficient for me.
Additionally, I’m using a Corsair Spec 01 case, which has a 150 mm cooler height limit and a 240 mm water AIO is a bit tricky to fit. I don’t want to risk overvolting the CPU, which could stress my H7 Quad Lumi (though I know it’s not ideal). I really like this case and wouldn’t want to change it unless absolutely necessary.
Thank you for reading my question.
I wouldn't exceed more than 1.38 for longevity, though it might be useful to compare others' approaches. Each chip behaves differently, but LLC handles voltage spikes well under heavy loads, keeping it at 5 with a 1.22v setting when all cores are maxed. If it drops to 1.15 at level 1, it would crash. For my setup, I'd aim for 1.25v and push LLC to its limit (possibly 5 on your board). Keep an eye on voltages and temperatures, run stress tests, and adjust the voltage if crashes occur. If stability is achieved, gradually lower it.
I discovered that Auto Vcore (with MCE) was significantly overshooting (8700k). I adjusted the voltage for 6 cores at 4.7Ghz to 1.22V, with LLC at 5 and auto set to 1.35V, which caused noticeable droop.
I discovered Auto Vcore (with MCE enabled) was significantly overshooting, around 8700k. I adjusted my settings to 6 cores at 4.7Ghz with 1.22V and LLC at 5, while the auto voltage was around 1.35V with LLC at 1, which caused noticeable droop.
Hi Snipergod87,
Thanks for the help.
I’m aware each chip behaves differently, but I’d like to know a good starting voltage. Also, besides LCC, do I need to configure anything else?
Additionally, could you estimate the maximum stable voltage I should apply to achieve a reliable 47 multiplier? I’m considering a cooler with 160 tdp and good airflow, and I don’t mind temperatures near 90°C during stress tests like Prime95, since performance will be lower in real games.
I wouldn't exceed 1.38 for longevity myself, though I might look at others' experiences—each chip behaves differently. LLC handles voltage under heavy loads, keeping it at 5 when all cores are maxed, which is ideal. If set to level 1, it would drop to around 1.15 and cause crashes. For stability, I'd aim for 1.25v with the board at full capacity, watch voltages and temperatures, run stress tests, and adjust voltage if needed. Crash scenarios should prompt a higher voltage setting. On my setup using a low-end Cryorig cooler, under heavy loads (in Prime95) I’d see temps in the 90s after half an hour, but not enough to trigger throttling. In real use, it doesn’t get heavily stressed for long periods. If you need to tweak UnCore speed, do so once a stable operating point is reached—small adjustments help identify what works best.
I wouldn't exceed much beyond 1.38 for longevity, though I'd like to compare with others—each chip behaves differently. LLC handles the voltage under heavy loads, keeping it at 5 when all cores are maxed, whereas setting it to 1 would drop it to around 1.15 and cause crashes. For my setup, I’d aim for 1.25v and keep LLC fully boosted (possibly 5 on your board). Keep an eye on voltages and temperatures, run stress tests, and if it fails, increase the voltage. If it stays stable, you can lower it. I’m testing on a low-end Cryorig cooler; under heavy loads in Prime95 I expect temps in the 90s after half an hour, but not enough to cause throttling. In real use, it doesn’t get heavily stressed for long. If you need to tweak the UnCore speed, do so once stability is confirmed—small adjustments help pinpoint what works best. Thanks for your clear guidance and patience with my beginner questions! 😛
I own the Cryorig H7 (standard non-RGB version). If Intel hadn't applied poor thermal paste between the CPU die and the IHS, temperatures might have been 15-25 degrees lower. I deliberately reduced the voltage as much as possible during stress tests to minimize heat generation and decrease the risk of thermal throttling.