I'm getting about 10 fps at Uk2000 Heathrow with 50% traffic in the PMDG  747. But my CPU usage is about 40%. How can i get FSX to use more to increase the fps? I have an i7 920 stock speed.

Uk2000's Heathrow is very hard on fps. Using similar settings I'd see maybe the high teens at a push. As you have UT2, check to see if you have 'animated jet bridges' selected in the control panel. If its checked, deselect it. That should boost your fps a little. Other than that, I'm afraid it's a case of lowering settings, which is a shame because the uk2000 Heathrow is Great.

 

Best wishes,

Jess B

I've been wondering about this question myself:

 

low CPU-load, low memory utilization, all texures loaded and still the fps are low.

 

I'm curious, too!

Sorry if I sound stupid but isn't that normal in multi core? I have a core2duo which is always ~52% used. That's one core at 100% for FSX and the other at 4% for everything else. 

 

London area is already quite a drag in terms of CPU, I can only imagine with UK2000 and 50% traffic in such a busy area.

 

It's a completely different reality since my system sucks but I have two different config profiles, one for flying in London (with one or two notches lower autogen, scenery, airport and car traffic) and another one for flying anywhere else in the world. It takes me 2 seconds to swap between them by loading it via FSX menu so I'm happy with this "solution".

Sorry if I sound stupid but isn't that normal in multi core? I have a core2duo which is always ~52% used. That's one core at 100% for FSX and the other at 4% for everything else. 

 

(...)

 

 

True: With HT 4 "cores" show up, but only 2 of them are real. So the max utilization with HT is 50%, plus the effect from the HT (I've witnessed 60% in total and slightly more than that).

 

So a utilization constantly below 50% still makes me wonder why ...

I've noticed this too quite often. I've come to the conclusion that FSX doesn't spread the cpu load well enough. FPS is low because the FPS happens to be most reliant on the 1 or 2 cores that are at 100%, even if the other cores are at 25%.

 

As has been said many times before we need a 8GHz cpu for FSX.

Screenshot of my task manager, looks like its only using the 3rd core?

 

task manager by GodAtum, on Flickr

I'd expect the same pattern for #1/#2 as for the other "pairs". That "double" looks a bit awry.

 

Did you specifically assign cores to processes?

Edited April 22, 201313 yr by olli4740

I find uk2000 Heathrow to be frame rate friendlier than the default Eggl. Great scenery, I guess that 747 uses a lot of computing power.

I'd expect the same pattern for #1/#2 as for the other "pairs". That "double" looks a bit awry.

 

Did you specifically assign cores to processes?

 

Nope I havent assigned any options.

Currently flying myself: That utilization pattern changes with flight situation.

 

- sometimes there's an equal distribution over all my "real" cores.

- sometimes 1 core is continously at max, with the other ones fluctuating, but the other three developing a common pattern

You need to state what your affinity mask is set to in your FSX.cfg file. A snap of task Manager doesn't tell us a thing!

As Jim said, affinity mask is important to set properly. I see your Core 2 is almost at 100%, sounds like your affinity mask is not right. Another thing you can adjust is fiber frame fraction time, I believe a lower number than default, like .10 or .20 will help bring more workload to the graphics card.

You need to state what your affinity mask is set to in your FSX.cfg file. A snap of task Manager doesn't tell us a thing!

 

Its AffinityMask=84 and FIBER_FRAME_TIME_FRACTION=0.33

Try ffft of 0.20 or 0.15