Hello,

 

I have been tweaking FSX for quite a while now (or at least trying hah) and I've gotten some pretty good results (with various addons such as Orbx FTX Global, Vector, OpenLC, addon airports and also with the PMDG 777, Active Sky, ect) and it performes very satisfactory, but I have stumbled uppon an issue recently. I have a Intel Core I7 3930k @ 4.5 (used to be at 4.6, but went back to 4.5 so it stays cooler), stable. But I've been doing some testing and it seems that FSX never reaches my OC speed of 4.5 Ghz, but will instead only go up to 4.2Ghz. I measured this with CPU-Z. And yes, my cpu will run at 4.5, when playing other games, or running CPU intensive software and of course when running synthetic benchmarks like prime95. I would really like to take advantage of all of my horsepower, so getting FSX to run at my processor's OC speed is a priority!

 

Some background info:

 

- 3930k @ 4.5 (liquid cooled), 16GB Corsair Vengance @ 2133Mhz, ASUS GTX 680 DirectCU II, ASUS Rampage IV Formula, 240 GB Crucial SSD (for windows only, sadly :/), 2TB WD Caviar Black HDD, 1000W    PSU.

 

- I do have HT enabled as I found it makes no difference disabling it for FSX and I do have the correct affinity mask setting for a 6 core, 12 thread CPU (so with HT enabled), which is 1364, and also my FSX CFG is properly tweaked.

 

All help would be greatly appreciated )

 

Are you using manual or offset mode for v-core?

Manual mode for Vcore, oh and thank you so much for the reply, what a great community

No problem. There's always someone willing to help out around here. Whether we actually do or not is anyone's guess, but someone will always try. The reason I asked about manual vs. offset mode is the problem sounds like a power/speed management issue. I previously used offset because it would downclock the chip, idling as low as 1.6Ghz at .92 v-core, which was very nice for long term operation. The problem is that it wasn't consistent with the voltage it was supplying at sustained loads (like FSX) and I would catch the clock speeds dropping from my OC of 4.4, with v-core drops down to 1.25 (with my standard OC voltage being closer to 1.31). 

 

Since you are already on manual mode, I would check out Windows options related to power management. I don't believe the problem is within FSX since CPU power regulation is not its responsibility. AF mask can control which cores to use, but not how they operate. The Nick N guide is a very good place to start since he is educated about Windows and how to optimize it. Going through that guide will help to make sure the operating system is set up ideally for FSX.

 

It may also be a good idea to check your CPU speed and temperature over time via a logging file. I believe CoreTemp is able to do so for both clock speed and temperature, per core. Analyzing this kind of data would tell you exactly the speeds the chip is hitting in FSX over the length of a flight, and how the speeds and temps may be interacting.      

Thank you so much will read Nick's N guide.

 

One quick question though, does "procspeed" (in FSX CFG) got to do anything with this? 

 

Also I have done some monitoring myself and my CPU temps (when playing FSX) don't get higher then 60, which is still pretty high, but hey, what can I say, my chip hasn't exactly been "cherry picked" off the production line. Oh and when running apps like prime95 it wont go over 85 which again is very hot but at least it doesn't break limits. But anyways, I will test and confirm this via logging file as soon as I can.

I think you may find that Windows is managing your CPU speed, you'll need to have a look at the power plan that you have selected and specifically "Minimum Processor State" under "Processor Power Management"

 

Start > search for Power > select Power Options under Control Panel.

 

You will see what option you have enabled by the selected radio button, the default is "Balanced" which sets a minimum CPU speed at 5% and a maximum at 100% and leaves Windows to decide how much you need. You could change this setting to 100% and test to see if this does force your CPU to run at full speed if not then you will need to be looking more closely at your BIOS / overclock. If this does make a difference then consider installing Razer Cortex which detects when you are running games and automatically optimises your computer for performance including adjusting the power settings then puts them back when you've finished.

 

Hope that helps.

I do have it set to balanced, and now I have set it to high performance and the max CPU speed under "Processor Power Managment" is at 100%, but still no diffrence :/ 

 

I guess I'll just have to reset the BIOS to its defaults and see if that will work, gosh :/

Have you set the "Minimum Processor State" to 100% as this was what I was suggesting? This will stop Windows managing the CPU speed and force it to use 100% all the time, you should be able to confirm this after making the change (and possibly rebooting) with whatever software you use to monitor CPU speed.