Hi All,

 

I have a newly built system based on an Asus P8Z77 - V Pro & i5 3570K with a Asus GTX 660 TI

 

I had everything running on basic settings with a "Word Not Allowed" tweaked FSX. Once happy that all was stable I started to over clock. I am currently running the i5 @ 4.5GHZ with a CPU voltage of 1.275. I ran FSX for 4 hours last night and at the end checked the CPU temp which was around 34 degrees. I also put a Antec 920 water cooler in the build which is amazing. I was wondering how far can these i5 3570K actually be pushed, is it possible to hit 5 GHZ ? I am so impressed at how rock solid this thing is so far and FSX is Sweeeeeeet :rolleyes:

 

The 660 TI is also over clocked to 1268 MHZ using the Asus GPU Tweak software.

 

So far I have only installed FSX but up to now the PC hasn't even broken into a sweat !!

 

Richard

4.7 is about as high as most guys seem to be going, though it can be pushed further-- if heat, voltage and degradation aren't a concern. If you have not checked it out, this is a great site with alot of help:

 

http://www.overclock.net/

I'd say it depends on 3 things.

1. Your chip. How lucky you were in the chiplottery.

2. Your cooling.

3. How daring you are. If you don't care if you happen to toast your CPU.

Westman runs his Ivy @ 5.2 Ghz I think...

3. How daring you are. If you don't care if you happen to toast your CPU.

Westman runs his Ivy @ 5.2 Ghz I think...

 

Run it @5.4 but think it was better with 5.3 and less voltage to the cpu, instead a thigted the mem and raise the mem voltage to 1.72V 24/7

 

Run it @5.4 but think it was better with 5.3 and less voltage to the cpu, instead a thigted the mem and raise the mem voltage to 1.72V 24/7

Sorry Hasse. Thanks for putting me right It must feel a bit like an insult to hear someone suggest that you might be running your Ivy CPU @ only 5.2Ghz haha =)

So Richard, I think that's how far you could go =)

Wow 5.4 GHZ !! Thats freakin amazing,

 

Think I'll head to 4.7 GHZ and see where that takes me. I have only played FSX on this so far but with the Antec cooler I have seen nothing above 34 degrees

 

Richard

Richard, it's all about keeping temps down. Hesse is running on phase cooling which allows him to increase voltage considerably while keeping temps down. I'm running 5.0 Ghz on a Corsair H100 watercooler with a vcore of 1.47v, while being 24/7 stable with full load temps in the 60s.

 

IvyBridge tend to hit a thermal wall at around 4.8Ghz and if you want to go higher, you will most definitely need to consider delidding your CPU in order to replace the crappy TIM Intel uses on these CPUs, because past 4.8ghz, you will definitely need to give that puppy some juice!

The higher you go with the chip the more voltage it's gonna need, like a log-curve. Like you might need 1.45 for 4.8, but you might need 1.6 for 5.0 already or even more. High voltages kill CPUs - this can be said without hesitation. The question is only when. Is it going to live through your usage lifespan.

There are some good advices in my guide about overclocking, see that video and the link if you already didn't.

Run it @5.4 but think it was better with 5.3 and less voltage to the cpu, instead a thigted the mem and raise the mem voltage to 1.72V 24/7

 

 

You're gonna have fried computer parts for dinner next week. :Big Grin:

 

I heard for Ivy Bridge, a safe voltage is 1.3 or below (correct me if I'm wrong). Just put it a 1.3, and see how far it will go as long as your temps are lower than 75C. For Sandy Bridge I wouldn't go above 1.4. It's exactly what I did for my i5 2500K; I put it at 1.4, and it wouldn't go further than 4.7 GHz. 4.8 GHz needed 1.42V. Then I managed to lower it to 1.39, running stable for a year already. I'm probably gonna upgrade to Haswell when it comes out, should be a good upgrade, cuz the i5 2500K is slowly getting a little bit outdated. Extra cache and and extra clock-for-clock speed should help quite a bit I hope.

You're gonna have fried computer parts for dinner next week. :Big Grin:

 

I prefer high mem voltages before high CPU voltages , run the cpu at 1.475 @5.3 and 1.72v on the mems the last 3 months.

yesterday a start the PC 9clock and run it 17hours flying differnt legs and testing the new REX and run KOSTAS cloud test with 3monitor

setup 10-15 times to get it flyable in heavy clouds and test settings for P3D.

No issiues at all the system is in balance now.

 

Hasse

I prefer high mem voltages before high CPU voltages , run the cpu at 1.475 @5.3 and 1.72v on the mems the last 3 months.

yesterday a start the PC 9clock and run it 17hours flying differnt legs and testing the new REX and run KOSTAS cloud test with 3monitor

setup 10-15 times to get it flyable in heavy clouds and test settings for P3D.

No issiues at all the system is in balance now.

 

Hasse

 

I hope you know what you.re doing, but my guess is, that despite your PC is running fine NOW, it's not gonna last very long with those voltages.

I hope you know what you.re doing, but my guess is, that despite your PC is running fine NOW, it's not gonna last very long with those voltages.

 

I run the CPU with -35C 1.475v and thats not high , the mems easy make 1.75V 24/7 they performs better and better.

 

I shall migrate to Haswell dont care if it only live for a couple of years

Maybe this can shed some light on overclocking Ivy Bridge:

 

 

I don't know how much FSX benefits from all the other features of an Ivy Bridge processor, and I think FSX is more-or-less purely responsive to the clock itself, but this video claims that an Ivy Bridge running at around 4.5GHz will provide the same benefits in performance as a Sandy Bridge at a much lower clock.