35 minutes ago, WestEnd said:

I downloaded the manual and read the section about cables. It doesn't seem to say anything about displayport in terms of working with 60hz but not 30hz. At least not that I can see.

I changed back to 30Hz in Windows display settings. I am sure 30Hz is working with the current cable as Windows denotes that it is, the screen went blank for a second, the colours changed a bit, and P3D seemed smoother afterwards.

I simply went off the official documentation on their website. Here it is for convenience...

HDMI IN 1/2 : 3840 x 2160 @ 30 Hz

HDMI IN 3/4 : 3840 x 2160 @ 60 Hz

DP IN (USB-C IN) : 3840 x 2160 @ 60 Hz

6 minutes ago, Ray Proudfoot said:

I simply went off the official documentation on their website. Here it is for convenience...

HDMI IN 1/2 : 3840 x 2160 @ 30 Hz

HDMI IN 3/4 : 3840 x 2160 @ 60 Hz

DP IN (USB-C IN) : 3840 x 2160 @ 60 Hz

I'm not the most knowledgeable about things like this, but here are my current display settings. There was a noticable difference when I changed back to 30Hz.

4 minutes ago, WestEnd said:

I'm not the most knowledgeable about things like this, but here are my current display settings. There was a noticable difference when I changed back to 30Hz.

You’re clearly running at 30Hz which makes the documentation suspect.

What does a “noticeable difference” mean?

Incidentally, you can use Print Screen to grab the contents of the display and save it as a jpg rather than taking photos.

2 minutes ago, Ray Proudfoot said:

You’re clearly running at 30Hz which makes the documentation suspect.

What does a “noticeable difference” mean?

Incidentally, you can use Print Screen to grab the contents of the display and save it as a jpg rather than taking photos.

Haha. Thanks for the tip about screen grabbing. As I said, I'm not that knowledgeable about things like this. 🙂

The difference was that as soon as I clicked to change to 30Hz the screen went blank for a second or so. When the picture returned the colour temperature was less warm. I then reloaded P3D where I had just done 2 circuits of an airport with 60hz resolution so I could see any before and after difference. I did the same circuit again with no change in settings except the change to 30Hz, and P3D was noticeably smoother.

@WestEnd, check Nvidia Control Panel for the colour selection. It’s possibly being changed there because of the frequency change.

Yes, 30Hz will be considerably smoother since you’re asking the CPU / GPU to only update the screen 30 times a second rather than 60 which will be impossible in heavy areas resulting in stutters with the CPU core0 working flat out.

That’s why monitors capable of 30Hz are the most suitable for flight sim.

23 hours ago, WestEnd said:

I just checked, my account is an administrator account, but the below image is whet I get when I click on that link.

Just to let you know, the reason for this is that the Web server is using a deprecated version of the TLS protocol (HTTPS) which is no longer supported by any current browser, so a secure connection cannot be negotiated. @Ray Proudfoot I'd be interested to know which browser you are using and the version? LG should really get round to updating its servers!

If you change 'https://' to 'http://' in the URL, dropping down to a non-secure connection, it will work, but you will probably get a warning about possible malware. You can safely ignore it on this occasion.

 

8 minutes ago, neilhewitt said:

 @Ray Proudfoot I'd be interested to know which browser you are using and the version? LG should really get round to updating its servers!

Two different ones. Mozilla Firefox on a W10 laptop. V89.0.2

Safari on iPad v12.5.4. Sorry, can’t find the version of Safari but it’s up to date.

Thanks for throwing a light on the problem.

Hi guys,

As a follow up question, how much is generally regarded as safe to overclock the CPU?

I've been faffing about looking at the BIOS in my PC, and I think I see the setting to change. I made a change just as an experiment which I can change back, and when I reboot my PC I see in task manager - performance that the CPU speed has increased from 4.68 to 4.97GHz.

Is there a rule of thumb as to what is likely to be a good number, or should I download a program that monitors the temperature of the CPU if I keep it overclocked? If it is then running below a certain temperature is that ok?

Thanks again for any informed help.

Edited July 21, 20214 yr by WestEnd

42 minutes ago, WestEnd said:

Hi guys,

As a follow up question, how much is generally regarded as safe to overclock the CPU?

I've been faffing about looking at the BIOS in my PC, and I think I see the setting to change. I made a change just as an experiment which I can change back, and when I reboot my PC I see in task manager - performance that the CPU speed has increased from 4.68 to 4.97GHz.

Is there a rule of thumb as to what is likely to be a good number, or should I download a program that monitors the temperature of the CPU if I keep it overclocked? If it is then running below a certain temperature is that ok?

Thanks again for any informed help.

Depends on the silicon lottery and how good your cooling is.  I can get 5Ghz out of my 10850K at 1.34v but it takes 1.4 to get it stable under load at 5.2Ghz.

Some will say 1.4v is too high, some won't. It all depends on how much you feel the need to push it and your hardware.  I'm not convinced any more than 5Gz is absolutely necessary in most use cases.

 

2 hours ago, WestEnd said:

Hi guys,

As a follow up question, how much is generally regarded as safe to overclock the CPU?

I've been faffing about looking at the BIOS in my PC, and I think I see the setting to change. I made a change just as an experiment which I can change back, and when I reboot my PC I see in task manager - performance that the CPU speed has increased from 4.68 to 4.97GHz.

Is there a rule of thumb as to what is likely to be a good number, or should I download a program that monitors the temperature of the CPU if I keep it overclocked? If it is then running below a certain temperature is that ok?

Thanks again for any informed help.

Unless you want to get into the minutiae of tweaking every possible parameter to squeeze the maximum stable overclock out of your CPU, I'd stick with the AI tuner, and just see how high you can go before it's unstable. You'll know it's reached a limit when it crashes immediately or doesn't even boot (your motherboard will pick this up and reset the overclock eventually, don't worry - worst case you have to default your BIOS back). Then start adjusting down until it boots reliably, and then run P3D to generate a load; it'll almost certainly crash quite a bit more under load until you dial down to a stable level. Kevin mentioned adjusting the CPU voltage - you can do that, even with the AI tuner, as an override, but that's a level of tweaking you probably don't want to get into. Anything beyond 5.2 GHz stable is gravy, but most chips should go to 5GHz with the right cooling. I clocked my main sim PC down a little to 4.7 to keep things cooler, but my image generator PC (this is a multi-channel sim) is cranked as high as it will go stably, which it 5.1 GHz.

Your overclock will depend on lots of things, but particularly the motherboard, the cooling (water will always do better than air cooling, for example), and then the chip itself. Some chips just don't overclock well because they were marginal, some go above and beyond. The higher your overclock, the hotter things will run, so adequate cooling is a must. If things get too hot the CPU will start to throttle the speed down to keep cool, and if it gets too hot eventually it'll just cut out and reset. It's almost impossible to damage the CPU with an overclock unless you have no cooling at all 🙂

Personally I don't bother monitoring the CPU temp in everyday use. When I set up a config I get Aida64 and run a stress test to see where the temps go, and if there's no thermal throttling under load, I'm good to go. I don't honestly care if my CPU is running at 85-90C all the time, as long as it's not throttling. The obsessive need to get lower temps is just like the obsessive need to get a faster overclock; it generates marginal returns and does nothing to help you enjoy your simming!

Also, make sure your RAM can handle the speed you're trying to run it at. If your RAM speed and CPU / bus speed are linked (there's a setting in the BIOS to turn this on / off) then you may end up trying to drive the RAM faster than it can go, which can cause instability and crashes. Generally speaking, the rated RAM speed is as far as you'll get it reliably. But if your RAM is relatively slow, your CPU will be waiting for memory access and this will remove some of the advantage of the overclock. Again, the AI tuner normally copes with this for you.

There's lots and lots of good content about all this stuff on YouTube. I highly recommend watching a few explanatory videos. 

Thanks for the replies guys. I have to admit I don't understand the majority of the points though.

I'll think I'll run things with what I've done, having bumped it from 4.68 to 4.97GHz, and if it get's unstable and crashes then reset the BIOS and just leave it the way it shipped.

19 minutes ago, WestEnd said:

Thanks for the replies guys. I have to admit I don't understand the majority of the points though.

Hence the recommendation to watch some tutorials. They will explain in detail what everything is and means. Overclocking is definitely on the more technical end of the spectrum.

To be honest, I personally believe that in the modern simming world you really do need to be moderately knowledgeable about PCs, Windows, hardware etc. This is not simple or straightforward software, and they way we tend to use it - with lots of add-on programs - just makes it more complex. It's no wonder some people get so frustrated. I've been battling with an unstable sim all afternoon and I'm about ready to smash my keyboard and throw in the towel. And I've been building computers and writing software for them since the 80s!