4,2Ghz voltage help please
4,2Ghz voltage help please
Hi
I updated my i5 4690K about a year ago using a great YouTube tutorial from stock 3.5 to 4.0, and it’s still running smoothly.
At that time, in the BIOS I could pick 4.2, which was the maximum, but I chose 4.0 to match what the video showed.
Now I have projects like project cars that would benefit from a bit more power, so I adjusted the multiplier to 4.2 and checked if it would handle the same voltages as before.
The PC is functioning well—no blue screens or crashes—but my CPU temperatures have dropped since the OC, which shouldn’t cause more heat.
For instance, when running dirt rally on a normal 4GHz OC, she stays between 45-50°C all day. At 4.2 she never exceeds 38°C, and the rear case exhaust air feels much cooler than before.
Performance hasn’t improved noticeably, though I’ve noticed occasional stuttering.
Should I consider raising the Vcore voltage now that I’m at 4.2GHz? Or would it be better to revert to 4.1GHz and test?
My original Vcore was 1.019, which rose to 1.119 after upgrading to 4GHz. My CPU input voltage is fixed at 1.750V.
Thanks for any advice, and have a happy Christmas to everyone!
Mark.
It's possible your temperatures dropped because your fan is running a little faster now with the higher clock rate. Essentially it passed a threshold. It is odd to see your temp drops 7c. The only other thing I can think of, and I could be very wrong here as my knowledge of electrical engineering is very limited, is that your particular CPU didn't need 1.2v for this clock rate so decreasing the time the voltage sat at 1.2v waiting for the next clock cycle dropped the temps.
There is no reason to increase the voltage if your CPU is stable in this new config. You only add voltage when you can not run stable at a higher clock speed. In fact, by following the guide on youtube it's possible you have been running at excess voltage for your...
It's possible your temperatures dropped because your fan is running a little faster now with the higher clock rate. Essentially it passed a threshold. It is odd to see your temp drops 7c. The only other thing I can think of, and I could be very wrong here as my knowledge of electrical engineering is very limited, is that your particular CPU didn't need 1.2v for this clock rate so decreasing the time the voltage sat at 1.2v waiting for the next clock cycle dropped the temps.
There is no reason to increase the voltage if your CPU is stable in this new config. You only add voltage when you can not run stable at a higher clock speed. In fact, by following the guide on youtube it's possible you have been running at excess voltage for your particular CPU/PSU/Mobo combination. Every chip is different. Perhaps 1.2v is enough for you to reach 4.8Ghz while for him it's what it takes for 4.0Ghz. You may even be able to push it further or back off the voltage a little in your current config. Or just leave it and be happy.
timeconsumer :
It's possible your temperatures dropped because your fan is running a little faster now with the higher clock rate. Essentially it passed a threshold. It is odd to see your temp drops 7c. The only other thing I can think of, and I could be very wrong here as my knowledge of electrical engineering is very limited, is that your particular CPU didn't need 1.2v for this clock rate so decreasing the time the voltage sat at 1.2v waiting for the next clock cycle dropped the temps.
There is no reason to increase the voltage if your CPU is stable in this new config. You only add voltage when you can not run stable at a higher clock speed. In fact, by following the guide on youtube it's possible you have been running at excess voltage for your particular CPU/PSU/Mobo combination. Every chip is different. Perhaps 1.2v is enough for you to reach 4.8Ghz while for him it's what it takes for 4.0Ghz. You may even be able to push it further or back off the voltage a little in your current config. Or just leave it and be happy.
Thank you so much for the reply and the info i am very greatfull.
My fans (noctua's all round total of 5) are set with the asrock fan control software so if anything they are running slower because the temps are lower and i have i think its called an Evo 12 CPU cooler on the i5.
i have been running my rig for two hours solid this evening with a mix of simulators and video coding and its never missed a beat and only seen it reach 40c once for a very short time with the GPU running 55 to 60c not a problem.
makes sense what you say about maybe my i5 has not been needing 1.119v all this time and now its happy with the extra 0.2Ghz at the same voltage.
if it helps here is the video i originally used its the same MB and CPU exactly thats why i used his settings and found it easy as it was my 1st time OC'ing steps.
https://www.youtube.com/watch?v=7cOBaW_9U3A
just out of interest tomorrow i will roll back the multiplier to 4Ghz as it was and watch the temps see if it gains that extra heat back again then put it back to 4.2Ghz .
i am thinking of treating myself to a stronger GPU in the January sales , i see you are the GPU master is there a sweet combo you have found with an i5 4690K that works well together for max performance on simulators.
thanks again you have helped loads there.
Mark.
timeconsumer :
Which simulators are you using? And what is the exact resolution of your monitor? What is your budget like?
To be honest, I really enjoy anything that involves driving or racing—so my favorites include farm sims, FSX, Assetto Corsa, project cars, GTA5, train sim, Eurotruck2, and dirt rally games.
My monitor is an Acer 27-inch model with a 1920x1080p resolution running at 60Mhz.
Since I’m in the UK, I’m targeting models around £250 (sorry if you’re confused about pounds—just let me know if you recommend a GPU).
Thanks.
With the budget and the 600w PSU, I would choose a GTX 970 here:
http://uk.pcpartpicker.com/part/evga-vid...4gp42974kr
It works excellently at 1080p and will fit nicely with your CPU.
timeconsumer :
With the budget and the 600w PSU, I would choose a GTX 970 here:
http://uk.pcpartpicker.com/part/evga-vid...4gp42974kr
It works excellently at 1080p and fits perfectly with your CPU.
This card has always been on my list, so glad you chose it too. I’ll definitely be searching for one next month during sales.
Thanks again for your help tonight and have a wonderful Christmas.
timeconsumer :
I’m glad to assist!
I decided to revert my CPU back to 4GHz from 4.2 to see if the increased heat output we discussed yesterday would return. Luckily, the temperatures stayed within normal ranges, and after some consideration, I think I understand what’s going on.
Just before that, I adjusted the CPU speed from 4 to 4.2 and noticed the fan header on my motherboard felt a bit loose. I gave it a gentle push clockwise, then carefully turned it back counterclockwise to restore its position. This small movement might have helped, and since temperatures dropped to around 8 to 10°C afterward, it seems to be working better.
After that, I increased the CPU speed to 4.4 just for testing, keeping the same voltage and settings. The system started up and ran smoothly.
I then began testing with Project Cars, raced for about 20 minutes at a steady speed of 80 to 120fps—no issues there. Suddenly, the PC crashed.
Do you think it’s worth trying a slight voltage increase? Or is 4.4 GHz too far from here?
At this point, I’m considering 4.4GHz at 1.119V. Based on my research, I believe going up to 1.2V would be safe.
What are your thoughts?