Recommended Posts

So I recently built a whole new Computer with i7-4790k and GTX960 and installed my copy of P3D plus several addons on it when then I noticed it framewise just didn't run as fast as I've seen on several YouTubers with almost the same specs. I figured that might be because they have overclocked to something like 4,6GHz to even 4,80GHz. I am really not liking the idea of overclocking my CPU mainly because my super cheap chassis wasn't made for that purpose yet I tried overclocking to 4,6GHz and to my surprise I got 2x more fps than before. I reduced the frequency to 4,5GHz and saw maybe 1-2 frames less but still very solid. Now I have it to 4,4GHz set and I see practically the same performance as before with 4,5GHz. I understand that with TurboBoost when all 4 cores are active it will go to only 4,2GHz (i think-not sure) but still that shouldn't have like half of the performance. Is it maybe something with P3D that fails with Intel TurboBoost?

Share this post


Link to post
Share on other sites
Help AVSIM continue to serve you!
Please donate today!

If your frame rates doubled from 4.4Ghz (stock turbo for an i7-4790K) to 4.6Ghz then something else got changed as well.

 

Cheers!
 

Luke

Share this post


Link to post
Share on other sites

GSX Activation Services detected a new hardware config after doing the overclock which was weird even with 4,4GHz set.

The only thing I did was sliding the CPU Clock Ratio from auto to 46 which gave me 4,6GHz.

Like stated before I have slided it to 44 which runs now at 4,4GHz and even with that I am getting two times as much FPS as if I left it in Default. Don't get me wrong. TurboBoost did work, but for somereason when "overclocking" to 4,4GHz on BIOS it gives much better perfomance. But it runs a little hotter (around 70°C max) now and I fear I still might dammage my system here.

Share this post


Link to post
Share on other sites

Devil's Canyon is a mini reactor and for the safety of your wallet you should install some aftermarket cooler if you don't have it yet.

I run mine at 4.7 / Cache 45 and I'm getting 65-68 celcius under full load.

Share this post


Link to post
Share on other sites

GSX Activation Services detected a new hardware config after doing the overclock which was weird even with 4,4GHz set.

The only thing I did was sliding the CPU Clock Ratio from auto to 46 which gave me 4,6GHz.

Like stated before I have slided it to 44 which runs now at 4,4GHz and even with that I am getting two times as much FPS as if I left it in Default. Don't get me wrong. TurboBoost did work, but for somereason when "overclocking" to 4,4GHz on BIOS it gives much better perfomance. But it runs a little hotter (around 70°C max) now and I fear I still might dammage my system here.

As Luke said, some other variable must have been at play. Overclocking is linear, if you overclock by 10% you get roughly a 10% increase in frame rate. I'd be grateful and not worry about why. Just guessing, probably talking nonsense, but it may have been some kind of bottleneck phenomenon at work.

 

As for temps, 70 degrees under load [as long as that's core temp not CPU temp] isn't a big deal and won't fry your CPU, 80 is generally regarded as the max to shoot for under load. However, as the other lads said, a better cooler would be a great idea in order to keep the heat down. Don't know if you are in your summer or winter, but if in winter, then the temp will be higher in summer.

 

You say you have a 212 Evo, not a bad cooler for the money, but far from the best. The reason your temp is higher than it would otherwise be, is that you allowed the motherboards auto rules to set the CPU voltage. To do that, without any kind of stress tests, it has to set a higher generic voltage to accommodate as many CPU's as possible, wherever they fall in the silicone lottery.

 

 

But as I said, 70 degrees as measured by something like CoreTemp, or RealTemp is not a huge deal.

 

Some temp measuring utilities measure CPU temp,so be careful because CPU temp is higher than core temp. Core temp is measured from sensors within the CPU die. CPU temp is measured from a sensor just under the IHS, thus it's higher.

 

There's also something called PECI, which often foxes people. It reads backwards, it counts down to zero, zero being TJ.Max.

Share this post


Link to post
Share on other sites

Thank you all for your tips! So I experimented a little more and found out that P3D runs actually much smoother if I disable TurboBoost. With TurboBoost on my CPU ran at first core at 4.4GHz. Second one went to 4.3GHz and third and forth went to 4.2GHz. Appearnetly P3D didn't like that the cores ran a different clock speeds  :pardon:

Then I put the multiplier to 4,40GHz so all cores run at 4,40GHz at the same time without playing with voltage settings, I kept it to auto. I ran a stresstest using LinX and watched how the temps reached almost over 100°C in RealTemp. I immediatly stopped the stresstest and started reducing the voltage until I reached 1.12V. I ran multiple stresstests and couldn't really find any errors at that voltage, also the temps are much better now going to 86°C at max.

 

Now I finally see something worthy for the price I've spent!

Share this post


Link to post
Share on other sites

Something to know about turbo bins.  This is the stock behavior for a 4790K:

3 or 4 cores running, max turbo 4.2 Ghz

2 cores running, max turbo 4.3 Ghz

1 core running, max turbo 4.4 Ghz

 

Essential this means an out of box 4790K is really a 4.2Ghz part, unless one disables turbo in the bios.  Plus, this is what intel considers rock solid safe.  If you extrapolate this a bit, it means that each core is easily capable of 4.4 Ghz , though enhanced cooling and perhaps an extra bit of voltage is necessary to maintain stability to push all four cores at this speed.

Share this post


Link to post
Share on other sites

4.6 Ghz seems to be the sweetspot on my Ivy Bridge.  Add volts but not too many to achieve a stable OC. 

 

Regards

jja

Share this post


Link to post
Share on other sites

4.6 Ghz seems to be the sweetspot on my Ivy Bridge.  Add volts but not too many to achieve a stable OC. 

 

Regards

jja

 

jja

 

Do you have any liquid cooling at 4.6? I'm running my 4790K at 4.4ghz which is stable on large cpu fan and ancillary case fans but don't want to go any higher without liquid, I don't know how far I can go just on fan cooling.

Share this post


Link to post
Share on other sites

4,60GHz would be a dream. But with 4,40GHz I am already archiving my goal. P3D with all the addons (REX SC - ORBX FTX Global - ASN - AS A320 - almost all addon airports I own) run now at butter smooth 30fps. Sometimes higher sometimes lower but 30fps is now average. So I'm fine if I can get 4,40GHz running.

 

I've followed this guide here too: http://lifehacker.com/a-beginners-introduction-to-overclocking-your-intel-pr-5580998

I cannot go more than 4,40GHz though. 4,50GHz requires me to have higher voltage to even boot into Windows without immediate crashing. One step higher and the temps rise over 90°C so that's a no go to me.

1.120V is running quite stable on my mashine at 4,40GHz. I did at least 5 stress tests on it spread through the whole day and not yet encountered any crashes, bsods or errors from LinX. From what I've read so far, the lower the Vcore voltage the better.

 

Please let me know if I still missed out something. I just recently built up this mashine and I really don't want to dammage my system here.

Share this post


Link to post
Share on other sites

I wouldn't worry about the Vc too much.  Is all in the temps.

 

jja

Share this post


Link to post
Share on other sites

jja

 

Do you have any liquid cooling at 4.6? I'm running my 4790K at 4.4ghz which is stable on large cpu fan and ancillary case fans but don't want to go any higher without liquid, I don't know how far I can go just on fan cooling.

You've never heard of the Noctua NH-D15 then?

 

Trust me, the best air coolers are perfectly capable of competing with closed loop water coolers.

 

Check this out...

 

Kraken X61 closed loop cooler overclocked 67.33 degrees.

Noctua NH-D15 air cooler overclocked 69.33 degrees.

 

Barely anything in it.

 

Noise levels...

 

Kraken X61 29 decibels.

NH-D15 24 decibels. Much quieter.

 

http://www.tweaktown.com/reviews/7301/noctua-nh-d15s-style-cpu-cooler-review/index6.html

 

My new Skylake build will be cooled by the NH-D15S and yes, overclocked too.

My current Ivy Bridge system is cooled by an NH-D14, and yes overclocked too.

Share this post


Link to post
Share on other sites

My system will be a skylake 6700K when I get my next pay packet, already have my NH-D15 waiting :)

Share this post


Link to post
Share on other sites

You've never heard of the Noctua NH-D15 then?

 

Trust me, the best air coolers are perfectly capable of competing with closed loop water coolers.

 

Check this out...

 

Kraken X61 closed loop cooler overclocked 67.33 degrees.

Noctua NH-D15 air cooler overclocked 69.33 degrees.

 

Barely anything in it.

 

Noise levels...

 

Kraken X61 29 decibels.

NH-D15 24 decibels. Much quieter.

 

http://www.tweaktown.com/reviews/7301/noctua-nh-d15s-style-cpu-cooler-review/index6.html

 

My new Skylake build will be cooled by the NH-D15S and yes, overclocked too.

My current Ivy Bridge system is cooled by an NH-D14, and yes overclocked too.

 

Agreed. I used to have a Cooler Master Hyper 212 Evo on my 2500k, and it would reach 73 degrees C at 4.2ghz.... I now have a Noctua NH-D14, and it allowed me to move the OC up to 4.5ghz while rarely seeing over 60 degrees C

Share this post


Link to post
Share on other sites

My personal option is that Skylake is a better overclocker than Haswell , opposite to others first findings.

Have two very good Haswell chips a 4770k and 4670 not find any better 4690k or 4690k.

I always save The best cpu.s for later use

 

MoBo . The fastest one for sim with single Gpu is the Asus Maximus VIII Impact

Its 100mhz faster than Hero VIII on CPU and 300mhz on the mems.

Share this post


Link to post
Share on other sites

Agreed. I used to have a Cooler Master Hyper 212 Evo on my 2500k, and it would reach 73 degrees C at 4.2ghz.... I now have a Noctua NH-D14, and it allowed me to move the OC up to 4.5ghz while rarely seeing over 60 degrees C

 

I opted for the NH-D15S this time. Better RAM clearance, clears the PCIe slot better and just one fan. Incidentally, one fan only increses temp by two degrees.

 

All this time we've been running with two fans on our D14/D15's, unnecessarily. makes sense if you think about it. Two fans doesn't increase the velocity of the air that passes through the heat sink, it just increases static pressure slightly.

My personal option is that Skylake is a better overclocker than Haswell , opposite to others first findings.

What sort of frequencies are you getting with Skylake Westman? And voltages?

Share this post


Link to post
Share on other sites

Appolgies to my bad eng, hope that you understand my point.

Iam a Overclocker with lot of Hadware,the best Haswell a have is a binned 4770k To find this tested a lot of 4770k 40-50 CPUs and 15 4790k.

Its 5ghz stable at 1.32v

My plan was to run this on my sim Pc but i find that a medium good 6700k was a lot faster.

 

I test my 6700k chips fast take 10minutes , first a test the minimum boot voltage to win7 start at 1.475v

If no boot no more test then decrease vcore in steps 0.025v hope for less than 1.3v

After that a run CB15 with 1.45v to see if it can do 4.9 then 5ghz at same vcore then decrease it 0.025v steps , Done now a have a clue what type of chip a have.

The tests is on a H110 at ambient temp 22-23c

 

Today a have 3pcs 6700k tested 12 this is the best ones

1. 5ghz 1.30v win7 1.40v CB15

2. 5ghz 1.35v win7 1.42v CB15

3. 5ghz 1.375v Win7 1.45v CB15

 

Retired the Hero VIII from bench have a Extreme VIII and Impact VIII for that.

 

My sim spec is nr3 6700k H110cooled , Hero VIII , mem gskill Ripjaws V 3200 @ 3600 cl16 1.42v

SSD samsung .

I run the CPU @ 4.9ghz 1.4v and uncore @ 4.8 with HT enabled i see temps 57-62C in fsx

Or with HT disabled @ 5ghz with same voltages and slightly lower temps 55-60C

 

This outpeform a Golden 4770k @5ghz 1.35v 2800mhz cl10 mems and the cracy thing Its runs cooler,

The 4770k is 63-68c @1.35v and Its Delidded.

a 6700k @ 1.4v not delidded runs cooler it was a suprize ( can be the less voltage regulators inside the CPU on Skylake )

 

nr 1-2 is delidded now, but the tests Done undelidded.

Share this post


Link to post
Share on other sites

Appolgies to my bad eng, hope that you understand my point.

Iam a Overclocker with lot of Hadware,the best Haswell a have is a binned 4770k To find this tested a lot of 4770k 40-50 CPUs and 15 4790k.

Its 5ghz stable at 1.32v

My plan was to run this on my sim Pc but i find that a medium good 6700k was a lot faster.

 

I test my 6700k chips fast take 10minutes , first a test the minimum boot voltage to win7 start at 1.475v

If no boot no more test then decrease vcore in steps 0.025v hope for less than 1.3v

After that a run CB15 with 1.45v to see if it can do 4.9 then 5ghz at same vcore then decrease it 0.025v steps , Done now a have a clue what type of chip a have.

The tests is on a H110 at ambient temp 22-23c

 

Today a have 3pcs 6700k tested 12 this is the best ones

1. 5ghz 1.30v win7 1.40v CB15

2. 5ghz 1.35v win7 1.42v CB15

3. 5ghz 1.375v Win7 1.45v CB15

 

Retired the Hero VIII from bench have a Extreme VIII and Impact VIII for that.

 

My sim spec is nr3 6700k H110cooled , Hero VIII , mem gskill Ripjaws V 3200 @ 3600 cl16 1.42v

SSD samsung .

I run the CPU @ 4.9ghz 1.4v and uncore @ 4.8 with HT enabled i see temps 57-62C in fsx

Or with HT disabled @ 5ghz with same voltages and slightly lower temps 55-60C

 

This outpeform a Golden 4770k @5ghz 1.35v 2800mhz cl10 mems and the cracy thing Its runs cooler,

The 4770k is 63-68c @1.35v and Its Delidded.

a 6700k @ 1.4v not delidded runs cooler it was a suprize ( can be the less voltage regulators inside the CPU on Skylake )

 

nr 1-2 is delidded now, but the tests Done undelidded.

 

What's your processor cache on the 4770/4790 @ 5Ghz?

Share this post


Link to post
Share on other sites

With AIO cooler 4500-4600 , normal 400-500mhz lovar than CPU speed on Haswell

Compared to 100 lower on Skylake

Share this post


Link to post
Share on other sites

With AIO cooler 4500-4600 , normal 400-500mhz lovar than CPU speed on Haswell

Compared to 100 lower on Skylake

 

That's nice. Best I managed to achieve on 4790K is 4.7 - 1.326 / 4.5 cache - 1.30. FSX temps 55-60

Anything with 4.8 and up I need to go past 1.35 and I just don't feel like going there :D

Share this post


Link to post
Share on other sites

A couple of things that need attention when talking about overclocking are:

* Airflow through the chassi

* Ambient temperature

 

If you don't have a good exchange of air in your chassi, a good and expensive cooling unit won't be able to perform right, so this is very important.

A positive air pressure (more air blowing in than out, so to speak) also helps with keeping dust away.

 

And of course the ambient temperature of the room that the computer is in plays a role. This is usually not a problem, but the cooler the better of course.

 

I had the almost now legendary Thermalright Extreme 120 aircooler for many years and it performed very well, but not as good as my current custom loop water cooling setup.

 

Building your own custom loop is a lot of fun and the performance can be excellent if you do your research and choose good components.

I cool both my CPU and GPU with a single loop, using two radiators (one 120mm and one 240mm).

The CPU (i5 2500K) at 4.5Ghz goues just above 50C under full load and the GPU (GTX 970 4GB) just above 40C at full load.

The GPU also overclocks to 1500Mhz Core, 8000Mhz Memory, perfectly stable.

Share this post


Link to post
Share on other sites

The 4770k is 63-68c @1.35v and Its Delidded.

a 6700k @ 1.4v not delidded runs cooler it was a suprize ( can be the less voltage regulators inside the CPU on Skylake )

 

nr 1-2 is delidded now, but the tests Done undelidded.

I hear what you say regarding the voltage regulators, but Do you think Intel may have done a better job with the Die/IHS interface Westman?

 

 

If you don't have a good exchange of air in your chassi, a good and expensive cooling unit won't be able to perform right, so this is very important.

A positive air pressure (more air blowing in than out, so to speak) also helps with keeping dust away.

 

This is something I've recently converted to. In the past I always favoured negative or balanced airflow. However, I must admit, I'm leaning toward a slight positive pressure these days. In fact my new enclosure is configured that way. Lian Li PC-X510. Three fans in two fans out. Having said that and something many forget when considering airflow, the graphics card also exhausts, as does the PSU, as I have it ingesting air from inside the enclosure. Easy enough for me to reduce the rpm of the uppermost rear fan though to make sure I have a positive pressure enclosure.

 

I've not configured one of my builds that way before, so the results will be interesting. However, I did some experiments a while ago and found no difference in temps between negative or positive pressure. Less dust ingress is of course my prime motivator.

  • Upvote 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this