Could exceeding 1.4v put your system at risk?
Could exceeding 1.4v put your system at risk?
I lost the silicone lottery and I’m aiming for a 5GHz on my 7700k.
I believe I should be able to reach 1.4 to 1.435, but I’m a bit unsure about going past 1.4.
My CPU is running with thermal grizzly conductonaut.
Between the IHS and AIO I use thermal grizzly kryonaut.
Here are my temperatures after running realbench for about 30 minutes to let the liquid heat up:
https://imgur.com/a/1CgY43x
The risk stems from too high a voltage.
1.4 would be my maximum.
Removing the voltage cap can manage heat at a fixed level, but you're more likely to hit safe limits before reaching thermal boundaries.
The processor may slow down or stop if it senses dangerously high temps—around 100c.
You often hear about impressive overclocking, but those with caution are quiet.
I believe your chip is average.
As of 6/9/17
What proportion can achieve an overclock at a reasonable 1.4v Vcore?
I7-7700K
4.9 83%
5.0 62%
5.1 29%
5.2 6%
I too missed the silicon lottery on my i5-3570k. It'll perform well at 4.3GHz with 1.08v. Going to 4.4GHz or above causes instability at any higher voltage, including up to 1.5v at any LLC level, RAM configuration, c-states, eco settings, or when all board currents are capped at 255. Will 1.4v affect its lifespan? Yes, it will significantly reduce its usability. Is it stable at 1.4v or above? Only the CPU knows for sure. The real issue isn't the temperatures, but the voltage within the cores damaging components and causing electrical leakage.
Your temperatures are within normal range, though that run operated at 1.2V and 4.5Ghz. You might be able to push beyond 1.4V up to around 1.45 for everyday use. The main concern is whether the 100MHz frequency adds value compared to the extra power usage and possibly shorter lifespan. Going above 1.4 could cause the chip to exceed 80% performance.
The risk stems from too high a voltage.
1.4 would be my maximum.
Removing the voltage regulator aids in managing heat at a specific level, yet you're more likely to hit safe limits before reaching thermal boundaries.
The processor may slow down or stop if it senses dangerously high temperatures—around 100c.
You often hear about impressive overclocking, but those with dogs are quiet.
I believe your chip is average.
As of 6/9/17
What percentage can achieve an overclock at a reasonable 1.4v Vcore?
I7-7700K
4.9 83%
5.0 62%
5.1 29%
5.2 6%
Did you use der8auer delid die mate 2 on Z270 Maximus Apex or high-end OC mobos? Did you follow the tutorial at https://youtu.be/DX24ocSJ4AI by der8auer? Were you considering purchasing https://www.ekwb.com/shop/ek-sf3d-inflection-point-evo? The more VRM phases a motherboard pack has, the better its ability to maintain stable voltages, which is why my success with 5GHz OC is only reinforced by good cooling and delid. I’m still trying to figure out how long a 1.4V supply at 5GHz will last—30 minutes seems too short, maybe you could share more useful tests like POV Ray or Cinebench?
A 30-minute session on an Aio is sufficient for cooling the coolant. Aircoolers require less than ten minutes, with most time dedicated to warming the case.
No. Although more common, silicon lottery issues persist in Intel CPUs, and a significant portion will remain unstable at 5.0GHz regardless of voltage or cooling methods. This instability stems from impurities within the silicon, affecting each batch differently based on cutting placement—whether near the edges or center. Cuts closer to the center tend to have lower impurity levels, as heavier elements like nickel and copper are pushed toward the periphery during manufacturing.
Power phase count offers some improvement, but only up to a point. Increasing phase counts can reduce the effects of voltage drop, though it won’t fully eliminate them. You’ll simply see more waves per period on the DC line. The greatest advantage comes when combined with a better PSU that provides cleaner, more stable power. Ideally, this involves high-quality Gold or Platinum PSUs. For most Bronze users, adding more than 12 phases has minimal impact.
Karadjgne shared some insights:
A 30-minute session on an Aio is suitable for cooling the coolant. Air coolers require less than 10 minutes, with most time dedicated to warming the case. That’s accurate!
He also mentioned that silicon purity remains a concern in Intel CPUs, especially at high frequencies like 5.0GHz. Impurities can vary between batches and even depend on where the wafer is cut. Cuts near the edges tend to have fewer impurities because heavier elements are pushed outward.
Would you like me to expand on that explanation?
this has more to do with design and production efficiency. for example, haswell-e processors are shipped either 6-core or 8-core, but are of the same physical design layout.
6-core variants are produced in the same physical layout but with 2 of the 8 cores disabled. thus, you'll see the 6-core chips run thermally better than the 8-cores because of the two "cold" inactive core on the chip.
this isn't just an intel thing, AMD is no exception.
dederedmi5plus :
Karadjgne :
30mins on an Aio is about right to acclimate the coolant. Aircoolers need less than 10mins and most of that is just for case heating purposes.
True!
Karadjgne :
And no. While more likely, silicon lottery is still rampant in Intel cpu's and there will still be a good sized percentage that will simply not be stable at 5.0GHz no matter what voltage or cooling. It's due to impurities in the silicon itself and will not only change from batch to batch but even placement of the cutting, whether it's towards/at the edge or center. Center cuts show a considerably lower rate of impurities as the manufacturing process tends to push most of the heavier impurities like nickel, copper, etc towards the edge.
Care to elaborate that?
■ I alway thought core count is the limiting factor of clock rate ( more core = less MHz, less core = more MHz), if 4 cores can hit 5GHz then why 6 windows parked 10 cores i9 7900X can't hit with the same cooler? or
■ is intel use different TIM for each? why 8086K such differ from 8700K, 8700 and 8600K?
Karadjgne :
Power phase count helps, but only to a certain extent. Higher phase counts tend to lessen the impact of vdroop, but won't eliminate it altogether, you'll just end up with a larger amount of waves per period on the DC line. The largest benefit to higher phases comes when paired with a better psu that already has a somewhat cleaner, more stable output. Basically the better Gold and Platinum psus. For most Bronze users, higher phase counts beyond 12 or so really don't do much at all.
PSU supply the CPU with 12V EPS 8 pin > the mobo's PWM switch that 12V to user's selected value, AFAIK on consumer PSU no +12V rail was reported drop below 25% by online reviewers, would the +12V voltage drop will still be over the 1.4V vcore ripple threshold,