Max Voltages for a i7-5820k?

[MitchJRyan]

Hey guys, currently i have stable overclock of 4.3 GHz on my i7-5820k with 1.299v on the core and 1.95v set as my VCCIN. If i raise the multiplier anymore the system will crash while stress testing. I have an MSI X99S Sli Plus and would love to get 4.4-4.5GHz. Im not really a fan of trying to change the BCLK. Is there anyway i could safely raise those voltages to maintain a stable oc at 4.4Ghz because i hear that 1.3 is supposed to be the max then there are other people saying 1.32 or 1.35 is the max you can do. There are people saying you can set the VCCIN as high as 2.225v! If them voltages are safe for 24/7 could please let me know.

Another thing is the ring voltage and ring multiplier. What should this be set to and what does it really do in terms of performance? Thnx in advance for the helpp guys! if you have any questions regarding any specs or anything else like that i will answer them ASAP!

 

[1LiquidPC]

I have to run 1.325V for my Vcore to be stabilize at 4.4Ghz, 1.3 isn't enough. Tried 4.5Ghz as well, but 1.325 isn't enough for me. Also, personally wouldn't go any higher than your 1.95 on VCCIN. Mine's on AUTO and it floats from 1.90 to ~ 1.92. What's considered "safe" is probably a matter of opinion, though I've heard the "1.3V" myself. Also, are you using Adaptive or Manual voltage? I was originally using adaptive, until I discovered the voltage "spikes" in certain games, benchmarks, and even web browsing. I had my voltage at 1.325, but it would spike up to about 1.41 on occasion from these scenarios. I recorded this using HWmonitor Pro, the trial version anyways. Other voltages stayed the same. This only applies to adaptive, which is why I'm now on Manual(which I've always used in previous builds anyways). I wasn't sure which is safer, to run on 1.325 all the time, or spike to 1.41, as far as CPU health is concerned. I stuck with my usual method as it's worked fine for me. CPU's that I "retired" from OCing for other systems are still running fine again at stock. For Ring bus speed, the main performance difference is going to be in benchmarks, not much of an effect on real-world applications and games from my understanding. However, I cranked mine up a bit regardless. Again, I've heard you want it to be within 500Mhz or so of your CPU speed, but not sure if there's any truth to this or if it's bad not to. I'm running at 4Ghz (also using 100 CPU strap) using a 40X multiplier at 1.25V. Stock is 3Ghz around 1.05v I believe.

 

[MitchJRyan]

Thanks LiquidPC, will there be any long term damage from turning the vcore up to 1.325 like you have?? And if so what will it do to the CPU. Also i believe i have manual voltage as it stays at a constant 1.299 in CPUID. Currently i have 3.7 on ring @ 1.199V i believe ill check when i get home to double check. If it is ill raise it to 1.25 and try around 3.9-4GHz tonight. So i shouldnt go over my 1.95 VCCIN?

Thanks again, Mitch

 

[1LiquidPC]

I can't say for sure if there is any long term damage. That's the way it goes w/ OC'ing. It may shorten the lifespan of the CPU some, but there are way to many factors to be sure(heat, voltage, how long per day PC is used, ect.) There is no specific voltage "cutoff", where if your below it you won't cause any long term damage, and above you will. Typically, damage wise, there are two things that can happen, though one is pretty much asking for it. This would be the "suicide runs" than people do, and don't care about how much voltage they put into a CPU, they just want the highest benchmark scores you can get. Doing this however, can basically kill a CPU in a short time where it's no longer functional, and the PC won't work without a replacement. The second thing that can happen, is overtime it's possible to degrade the chip. What this means for example, is say you get the chip to work at 4.5Ghz and it's stable/runs fine at a specific voltage. What can happen as time goes on(again no way to tell how long, if at all), is that the chip will no longer be stable at 4.5, you would either need more voltage or slow it down to 4.4, 4.3 and so on to regain stability. It may get to the point that it's not stable anymore at stock speed, which would also require a replacement CPU. Also, you may or may not get to 4Ghz on your Ring speed, even at the same or higher voltage (1.25v) The ASUS board I'm using has the OC Socket, which is said to be able to get a higher overclock on the Uncore than other motherboards, though how much truth there is to that I can't say, just from the reviews I've read. To summarize, only you can decide what voltages your comfortable with. I'm just saying I'm not comfortable going higher than the voltages I mentioned above in my previous post.

 

[MitchJRyan]

Alright i have come to the conclusion that the only other way to get higher than 4.3GHz is to increase the BCLK. Because even at 1.35 VCore it will only last a few seconds on any stress test then will BSOD. What should i set the BCLK to? i Currently have it at 101.05 (wanted 101 and added .05 automatically) pushing my uncore up to 3738MHz, my ram up to 2425 (2400 from XMP 2.0 and 25 more from BCLK change) and my CPU up to 4345MHz. I dont want to push anything to far as this PC needs to last me a few years. So do i need to turn XMP off so i dont blow the ram or will it be fine if i push it past its XMP speeds of 2400? Also big thanks to 1LiquidPC for the quick responses and the help so far.

 

[1LiquidPC]

Your RAM can most likely go much higher. These early DDR4 modules are very OC friendly/underclocked from the manufacturer. Depending on how lucky you are you might be able to go to 2666 safely at stock voltage(1.2v). I wouldn't be concerned with damaging the RAM. For your BCLK, you might be able to go to 103 -105, after that you're probably going to run into stability problems.