Is this a safe/reasonable overclock for i7 2600k? 4.4Ghz 1.32 Vcore with Prime95

Vizzini89

Commendable
Feb 7, 2017
3
0
1,510
Hi everyone, I am in the process of performing my first overclock. Trying to achieve a stable/safe overclock for my i7 2600k.

My Specs:
Processor: i7 2600k
CPU Fan: Hyper 212 Evo
Mobo: AsRock z77 extreme4
Memory: 16Gb Crucial Ballistix DDR3 1600
GPU: GTX 1080 FTW
PSU: Corsair RM850x

My target is to reach 4.4GHz. I used this video guide as an initial setup point for my OC. Currently I have turbo voltage at +0.004v(lowest setting) and offset at -0.010v. When running prime 95 my vCore mainly stays around 1.312v but will hit 1.328v occasionally. My temps max at about 70c (prime95 running for an hr now), but from my observation they will stay at this temp for 2-3 minutes and then drop to around 62c. So they seem to be running mainly around 62c with an occasional temperature spike. Do these results seem safe? Should I be able to run 4.4 at lower voltage? I know I still have a while to go for ensuring stability with prime95 but thought I would ask questions in case voltage was too high.

Also, I have recently read that the current Nvidia driver (378.49) has resulted in some instability in some OCd systems. That is the current driver I have installed, would it be best for me to install on a previous driver version and try to achieve a stable overclock on that?

Is this a good overclock? If not, any suggested change in settings?
 
Solution
The Tcase temperature is measured at the heat spreader and the Tjunction temperature is measured at the CPU core(s). In HWMonitor, this is the 'package' temperature and it's the one that you need to keep an eye on. Where are you getting your temperature readings from?

The problem with the video you've seen is that the uploader hasn't adjusted VCORE. The overclock works, yes, but the CPU is spewing out more heat than it needs to as a result. The uploader hasn't taken the time to fully explain everything, which is why tutorials like these are best avoided. The best way to overclock is to manually adjust VCORE so you can have a stable overclock whilst keeping the temperature as low as possible. Your mileage may vary but my 2500K can...

chef7734

Distinguished
Mar 3, 2009
856
0
19,010
I would say that temps of 70c are a bit high. I would start to look at a aio liquid cooling option if you are planning on running overclocked. Ideally maxing out in the 50's c area is where you want to be at under prime 95 load. I really would not want to be in the upper 60s or even in the 70s at all.
 

Plutonium239

Reputable
Dec 10, 2015
3
0
4,510
70C on an 2600k in prime 95 for one hour is perfectly fine. I personally, like to keep my 2600k around Intel’s recommended Tcase temperature of 73 C. In addition, don’t forget the 2600k has a Tjmax temperature at I believe 98 C. If your CPU temperatures are in the low 70s on a stress test after one hour the probability of your CPU getting anywhere near 98 C is extremely unlikely. Moreover, it sounds like you are using this system for gaming, which you will see even lower temperatures on you CPU. In less your case has poor air circulation. If you know this is your stable overclock at that multiplier and voltage I would recommend keeping it there. One thing to keep in mind, you may need to decrease your overclock in the summer months.
 
The Tcase temperature is measured at the heat spreader and the Tjunction temperature is measured at the CPU core(s). In HWMonitor, this is the 'package' temperature and it's the one that you need to keep an eye on. Where are you getting your temperature readings from?

The problem with the video you've seen is that the uploader hasn't adjusted VCORE. The overclock works, yes, but the CPU is spewing out more heat than it needs to as a result. The uploader hasn't taken the time to fully explain everything, which is why tutorials like these are best avoided. The best way to overclock is to manually adjust VCORE so you can have a stable overclock whilst keeping the temperature as low as possible. Your mileage may vary but my 2500K can overclock to 4.4Ghz with 1.25 VCORE, so 1.32 seems hugely excessive.
 
Solution