Maximum safe voltage for i7 6800k

[Velocity_]

Whats the max safe voltage to run through my i7 6800k? I currently have it clocked at 4.2 GHz at 1.35 volts stable, but is this voltage too high for long term use?

[PCGuy_5960]

1.35V is fine. Just don't go higher.

[Simon771]

1,35V should be still okay

What are your temps under full load?

 

I wouldn't go anything over 1,4V for daily use.

 

Does your CPU realy need 1,35V to achive 4,2GHz OC?

[hconverse02]

Just now, Simon771 said:

1,35V should be still okay

What are your temps under full load?

 

I wouldn't go anything over 1,4V for daily use.

 

Does your CPU realy need 1,35V to achive 4,2GHz OC?

Looks like he didn't win the silicon lottery.

[Velocity_]

1 minute ago, Simon771 said:

1,35V should be still okay

What are your temps under full load?

 

I wouldn't go anything over 1,4V for daily use.

 

Does your CPU realy need 1,35V to achive 4,2GHz OC?

58C under full load for 30 minutes. and the overclock failed in 5 minutes at 1.3 volts

[Velocity_]

1 minute ago, hconverse02 said:

Looks like he didn't win the silicon lottery.

I lost it for my GPU too

[hconverse02]

1 minute ago, Velocity_ said:

I lost it for my GPU too

Thats unfortunate.

[Simon771]

4 minutes ago, hconverse02 said:

Looks like he didn't win the silicon lottery.

Yeah seems so. But I saw quiete a few people getting 4,2GHz at 1,25V.

3 minutes ago, Velocity_ said:

58C under full load for 30 minutes. and the overclock failed in 5 minutes at 1.3 volts

Well temp seems more than fine, so I would stay with this OC.

You might be able to get 4,3GHz at 1,4V, but not sure if that extra 100MHz is worth it.

[hconverse02]

6 minutes ago, Velocity_ said:

58C under full load for 30 minutes. and the overclock failed in 5 minutes at 1.3 volts

Your temps are actually really good. I'd suggest pushing the oc further

[PCGuy_5960]

6 minutes ago, Velocity_ said:

I lost it for my GPU too

If you can (and want) return it and get a 5820K, you will be able to get 4.6GHz with the same voltage

[knightslugger]

I've experianced this same "WTF this should clock higher with less" feeling as you with regards to my 6700k. turns out the LLC set to auto was feeding the CPU unbelievable amounts of voltage and the only way to get temps down was to reduce the multi to no higher than 42x... which is BS.

 

Then i posted up, someone commented on the voltage, and i started putting two and two together.

 

VID is what the CPU wants, VCORE is what the CPU gets. VCORE is what you should look at when the CPU is under load as it relates to VID. if you see a big dip in VCORE voltage compared to what you manually input, say input 1.300 and it droops to 1.270), you need more line load calibration so that it stays around that 1.300 mark when the CPU is under load. if left to auto, VCORE is going to go NUTS with voltage and overvolt the HELL out of it.

[Velocity_]

1 minute ago, PCGuy_5960 said:

If you can (and want) return it and get a 5820K, you will be able to get 4.6GHz with the same voltage

Tempting but I'd rather not have my pc unusable for 1-2 weeks 

[PCGuy_5960]

1 minute ago, Velocity_ said:

Tempting but I'd rather not have my pc unusable for 1-2 weeks 

That's up to you...

[Velocity_]

2 minutes ago, knightslugger said:

I've experianced this same "WTF this should clock higher with less" feeling as you with regards to my 6700k. turns out the LLC set to auto was feeding the CPU unbelievable amounts of voltage and the only way to get temps down was to reduce the multi to no higher than 42x... which is BS.

 

Then i posted up, someone commented on the voltage, and i started putting two and two together.

 

VID is what the CPU wants, VCORE is what the CPU gets. VCORE is what you should look at when the CPU is under load as it relates to VID. if you see a big dip in VCORE voltage compared to what you manually input, say input 1.300 and it droops to 1.270), you need more line load calibration so that it stays around that 1.300 mark when the CPU is under load. if left to auto, VCORE is going to go NUTS with voltage and overvolt the HELL out of it.

My temps aren't an issue and my voltage is staying at stable 1.35, but I'll still check my bios to see if this is on auto

[Velocity_]

1 hour ago, Simon771 said:

Yeah seems so. But I saw quiete a few people getting 4,2GHz at 1,25V.

Well temp seems more than fine, so I would stay with this OC.

You might be able to get 4,3GHz at 1,4V, but not sure if that extra 100MHz is worth it.

This overclock you sugested is running stable at 61C, I might keep it (I couldn't get 4.4 at 1.4) so it wouldn't be safe to push the voltage further?

[Simon771]

4 minutes ago, Velocity_ said:

This overclock you sugested is running stable at 61C, I might keep it (I couldn't get 4.4 at 1.4) so it wouldn't be safe to push the voltage further?

I wouldn't go to more than 1,4V. Now just try and see what frequency you can get from 1,4V

[Paradine Sage]

Safe voltage levels are a hazy area of moderate dispute in the OC community.

 

CPU's at stock settings are generally going to last 10 to 15 years reliably (and may often last longer). Most people who are even contemplating OCing tend to be on sub five year upgrade cycles. What this means is that settings that slash a chips life expectancy in half are in many cases near totally irrelevant.

 

In addition, no one really knows exactly how much a given voltage reduces life expectancy for a given line of chips. Broadwell-E launched in 2016, meaning that all we would be able to say is "these voltages and temperatures cause failure inside a year". There is also near zero information on even that as few people are willing to take a large number of several hundred dollar chips and then stress test them to the point of failure. Are you willing to put your 6800K under 100% load at 1.5 volts keeping the temp at ~70c for a year or so to see what happens? How about the same thing but ramping load up and down randomly every few seconds? 

 

Generally, for a 24/7 OC where temps aren't a concern, try to stay closer to 1.35 than 1.4 but honestly even at 1.4 you probably aren't going to see noticeable degradation in the time span of your usage of the CPU.

[brighttail]

With the x99 chips 1.32 to 1.33 is about where increasing the volts starts dramatically increasing the temps.  I have a 5930k and got to 4.4Ghz at 1.33.  If you can get where you are at with 1.35 you should be okay.  If you don't need it at that level all the time you can swap to Adaptive mode and give it a + of .01 and you'll find yourself in good shape. 

[Majsterek]

My temps are around 70 C at 1.35 V 

[Mac-Joe]

Heys Guys,

 

OVERCLOCKING the i7-6800k to 4.200 GHz... ran handbrake for about 2 hour.... seems stable!

Hardware. ASUS Rampage V Edition 10, i7-6800k, 64 Gb-Ram DDR4-3000.CPU Core Voltage set to 1.275 Volts and CPU Cache Voltage to 1.275 Volts

The temperatures rises with custom water cooling loop to about 74 degrees celcius which does not seem right for me... it should be max about 65 degrees celcius.

 

I think I need THREADRIPPER.... LOL

 

Joe