Sign in to follow this  
StewCal

To Overclock or Not to Overclock?

Recommended Posts

Just built a new computer with a 6700k processor which runs at 4.2 GHZ in turbo mode.  Of course my first inclination was to overclock the bejesus out of it.  In fact I didn't even try to run Prepar3d at the stock clock speed.  My previous system was a 2600K overclocked originally to 4.8 GHZ but reduced to 4.6 GHZ as the system aged which gave me descent performance so I figured I should be able to get 4.8 GHZ out of the new chip and I could fly to the moon!!  Well....I got the system to boot at 4.6 GHZ and boy did Prepar3d look good!  The problem however was that I could not complete a flight without having a CTD or some other well documented "issue with Prepar3d".  I immediately began bad mouthing Prepar3d (In my own head that is).  Why can't somebody just make a frickin, flight simulator that works ,*&^%&%$&^ etc etc.

 

To make a long story short......I reset my Bios setting to default and, pouting,  booted up Prepar3d.  Well...boy did Prepar3d look good!  And boy did Prepar3d perform well!  In fact, it blew away my old systems performance with much higher settings and no overclock.  And guess what?  I have not a single CDT or freeze or anything else.  Smoooth and stable and no headaches.  What more could I ask.

 

Now don't get me wrong, I still have that 4.4 or 4.5 bouncing around in my head but I'm trying to resist.  So my advice is if your having Prepar3d reliability issues try the stock CPU speed if you have one of the more recent chips or if you're trying to decide whether to upgrade your CPU know that you don't necessarily need to overclock to have a super stable setup if you do.

Share this post


Link to post
Help AVSIM continue to serve you!
Please donate today!

Not so fast, what works for you is not what would work for anybody else, there are too many variables when  comes to System/Sim/Addons etc. My advice is OC and see.

Share this post


Link to post

I have 6700k and I think that this CPU was born to be OC-ed. Just get your self a nice W/C system. Mine is running on 4.7 with HT Off. Have never been more happier than now. 

Share this post


Link to post

Much difference in a 4790k and a 6700k? Looking at upgrading from a 4690k.

Share this post


Link to post

I'm not necessarily saying not to overclock and I probably will continue to play around with it but it's nice to know that it's not 100% essential.  That being said, I'm sure that this is considerably more of a performance boost by overclocking a 2600 k running at 3.4 Ghz to 4.8GHZ than a 6700k running at 4.2 Ghz to the same 4.8 GHZ.

Share this post


Link to post

My advice: Moderate overclock.

 

Why:

I'm sure someone will post that moving from 4.2 to 4.8 only gives you X more frames. IMO, flying the sim requires every frame you can get for a more immersive experience. While it may be true that going from 48 to 51 FPS is  a waste, if you are like me simming complex aircraft in major airports, then the difference between 17 and 20 FPS, might make a difference. Additionally, your inner "OC the beejezus out of it" voice might be silenced once you obtain a sustainable, moderate, OC.

Share this post


Link to post

Being able to boot @4.8 is something completely different than running a stable 4.8 clock and I'll be quite suprised if you manage to get a stable 4.8 clock without pushing your vcore to the limits. 4.7 maybe, 4.6 probably, 4.5 definitely. I personally lucked out in the siliconelottery and can can only achieve 4.6 at v1.39, so I settled for 4.5@v1.34 HT On. I'm able to boot at 4,8 no problem but that means nothing and will only lead to CTD like the ones you had. Considering the fairly high stock speed, these 6700k doesnt really clock that well compared to the Skylake i5 which can achieve pretty much the same OC as their bigbrother 6700k eventhough its stock speed is a half ghz lower...

Share this post


Link to post

I don't need 50FPS. I need STABLE and STUTTER FREE 22-32FPS everywhere, from VFR field to FSDT KJFK with 100% AI. That's where OC with proper HT and AM settings does help a lot. 

Share this post


Link to post

Right now I am using a air cooler so I didn't dare going much above 1.35v for the core voltage.  I'm sure that is a big factor in my lack of success.  Like I said, I'm sure I'll fool around in the future but I don't feel that I have to rush out today and fork over the cash for water cooling.  In the interim I can  fly with better performance than with my old system.

Share this post


Link to post

Nice Anders, the answer is opinions are like belly buttons. Everyone has one.

 

My 6700K machine was built with overclocking in mind and it is very stable over many months at 4.7 GHz HT on but I run it HT off to be conservative with the heat.  This is not done for the big frame rate numbers, because I lock at 24 frames/sec. My goal is a consistently stable stutter free animation, which I have achieved for the most part.  Still tweaking to get rid of a few long frames in the FTX NA SCA region but that has nothing to do with this topic. So I''ve exposed my belly button and will move on.

  • Upvote 1

Share this post


Link to post

Nice Anders, the answer is opinions are like belly buttons. Everyone has one.

 

My 6700K machine was built with overclocking in mind and it is very stable over many months at 4.7 GHz HT on but I run it HT off to be conservative with the heat.  This is not done for the big frame rate numbers, because I lock at 24 frames/sec. My goal is a consistently stable stutter free animation, which I have achieved for the most part.  Still tweaking to get rid of a few long frames in the FTX NA SCA region but that has nothing to do with this topic. So I''ve exposed my belly button and will move on.

Hello, whats the meaning with HTA? Just about to overclock mine i7 6700k and reading up on the guides :)

Share this post


Link to post

Much difference in a 4790k and a 6700k? Looking at upgrading from a 4690k.

 

completely not worth it

Share this post


Link to post

completely not worth it

 

 

I wouldn't say "completely", but gains will be barely noticeable assuming the same clocks. Stability and reliability will be better on 6700k, I think.

 

I went from 2700k/4.4 to 6700k/4.7.  Earth vs. Heaven. 

Share this post


Link to post

I have the same processor with HT On and I'm not overclocking it so far. The issue is I'm getting over 35 fps, any scenery with airliners, so there is no reason to do that. Keeping the processor for a long life. I tried the overclock but only get and average of 5 more frames. Not really make a difference in smothness and performance.

Share this post


Link to post

yeah from a 2700 it would be worth it. but not sure how it could be better stability and reliability. my 4770k is rock solid at 4.8 max temperatures about 50.

Share this post


Link to post

I have the same processor with HT On and I'm not overclocking it so far. The issue is I'm getting over 35 fps, any scenery with airliners, so there is no reason to do that. Keeping the processor for a long life. I tried the overclock but only get and average of 5 more frames. Not really make a difference in smothness and performance.

 

 

Folk,

 

You're investing huge money into top-notch hardware and after all do not extract all the benefits from it. It's like skipping guaranteed dividends from preferred stock. Overclocking in 2016 is not longer a rocket-science. ASUS has a plenty of easy-to-read step-by-step tutorials how to OC properly and safely. You will not fry your CPU, worst case scenario - your PC would simply reboot. Hardware-wise, the only thing you need to seriously consider is a good cooling system to keep temperatures under control. 

Share this post


Link to post

Folk,

 

You're investing huge money into top-notch hardware and after all do not extract all the benefits from it. It's like skipping guaranteed dividends from preferred stock. Overclocking in 2016 is not longer a rocket-science. ASUS has a plenty of easy-to-read step-by-step tutorials how to OC properly and safely. You will not fry your CPU, worst case scenario - your PC would simply reboot. Hardware-wise, the only thing you need to seriously consider is a good cooling system to keep temperatures under control.

 

Thank you for the advice my friend. I will do it for sure. I'm using Corsair H110i for cooling so I think am ready to. But my Corsair 760T and that cooler are a little noisy while overclocked.

Share this post


Link to post

completely not worth it

I have a 4790K sitting side by side with a 6700K and I can say without flinching that there is a difference. Some is due to the architecture but most is due to the faster DDR4, which can run at 3400 MHz stock depending on brand and model. That is a pretty big difference. Reviews on line support my observation.

Share this post


Link to post

Watch out when overclocking a 14nm chip like the i6700k. They might degrade quicker if they are not thoughtfully overclocked.

 

Main benefit of i6700k is DDR4 and optimisations intel made to the CPU. Unfortunately for us simmers, the main reason that intel goes to smaller dies is a marketing one. They want more area set aside for the benefits of the internal GPU which there is a significant demand for even though us simmers don't need it we have to accept the wasted chip area for that {expletive} internal GPU.

 

"Carefully" means if you buy the chip and on day one notice that it is unstable at a higher overclock using the motherboards built in overclock settings, it probably means you have lucked out in the silicon lottery.

 

If you then decide to take matters into your own hands and put on a bigger heat sink or customize the overclock yourself overriding the motherboard oc settings, you might get the high overclock you are after, but find out less than a year later that your chip has degraded.

 

Heat is not the only indicator of long term reliability. Cool chips can still degrade on higher voltages. Degrade means they might still work but need higher and higher voltages and lower and lower multipliers to remain stable.

 

I have seen an i6700k go from a 4.7 OC to 3.5 GHZ max (1.2GHZ drop) in under a year even when it's temps were kept below 65C. The chip took a lot of manual tweaking to get it to 4.7OC. It didn't get their easily but did get there after a big struggle but then degraded quickly anyway.

 

Be wary about LLC settings. Overriding the motherboards selection of LLC can be risky because of voltage overshoot. The calibration is tighter but overshoot on the leading and lagging edges of the clock can mean that with high LLC vcore degradation is higher than you would think. I think LLC is best kept at the motherboards preferred settings in most cases.

 

If the chip get's the OC effortlessly using built in motherboard oc settings, and you keep temps reasonable, I'd say no probs go with the OC.

 

The difference between a 3.5GHz chip and a 4.7GHz chip in P3D is you run less traffic and will see an increase in occasional long frames.

 

Latest P3D 3.4.9 is doable on a 3.5GHz chip, because it is the most optimized version yet.

 

High end stable overclocks are still worth doing if it comes easily.

 

These comments are just my own opinions based on experiences I've seen.

Share this post


Link to post

My new system has a i6700k OCed 10% @ 4.4, just a hair over the turbo mode clock rate. It runs P3d 3.4 beautifully, even with the two "CPU killers" - building autogen maxed and AI Traffic set to 40% (My Traffic 6, with the Traffic Optimizer set @ 200 IFR AI aircraft in the user bubble). It matches up perfectly with the GTX 1080. The CPU cooler is  an Asetek 550LC dual 120mm (push/pull), so I'm sure that I could go at least to 4.6. My experience is that the performance gain is not all that noticeable with P3d.

 

On the other hand, if I opt for VR, the system might not be all that future-proof.

Share this post


Link to post

I have a 4790K sitting side by side with a 6700K and I can say without flinching that there is a difference. Some is due to the architecture but most is due to the faster DDR4, which can run at 3400 MHz stock depending on brand and model. That is a pretty big difference. Reviews on line support my observation.

 

if you say so! clock for clock, the difference in games will be negligible.

Share this post


Link to post

Kevin Humphryes, on 28 Sept 2016 - 10:33 AM, said:

Much difference in a 4790k and a 6700k? Looking at upgrading from a 4690k.

 

completely not worth it

 

 

 

So going from a i5 4690k to a 4790k would be a waste?

Share this post


Link to post

not really worth it either for fsx/p3d. but with hyperthreading you will certainly see gains in other areas. depends on the price you can get it for!

Share this post


Link to post

Still, I think it's pretty cool that we are at a point where not overclocking is an option.  Did a flight from KIAH to EDDF last night while I slept.  With my old system (granted it was a bit worn out) I'd have about a 50/50 chance that the flight would be paused and waiting for landing and not CTDed.

Share this post


Link to post

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