Why does the "CPU usage" graph show 50%When the "CPU0" usage history" graph is at 99% or nearly flat lined way at the top of the graph?CPU1 runs about 10%It is like the scale is wrong for the history graph. You would think both graphs would show 50% about in the middle of the visible graph area. INTEL P4 HT

Read before write.FS does NOT support multiple cores.Allcott

Hi,I was wondering if there was a way to change the scale of the history graphs?My CPU0 is at the top of the graph ... what % of CPU0 is being utilized?I assumed the CPU graph (vertical on on the left side) that shows 50% was CPU0 & CPU1 combined usage?

The scale is, obviously, 0-100%. It's a relative scale, not empirical. Adjusting the scale is irrelevant!So, even more obviously, when one processor is working at 100% and the other is working at 0% the combined usage is 50%.Basic math, proving that you're only working on one core.Allcott

This seems to be a good point to ask a question that I have been wondering about. I have a Pent 4 3.0 MHZ processor. Which means, as I understand it, I have two 1.5 MHZ processors working together using HT.Does this mean I have what is called a duo core processor ?If Flight Sim doesn't support "multi cores" does this also mean I'm running flight sim basically on a single core 1.5 MHZ processor?At what point, MHZ wise, did Pentium go from a single processor to duo processors? If my cousin has a computer with a single core 1.8 MHZ processor, does his computer have more power to run flight sim than my Pent 4 3.0 MHZ using HT which boils down to a 1.5 MHZ running flight sim? thanks Daryll

Daryll,Your 3GHz processor with HT is a single core CPU that is running at 3GHz. HT is like a psuedo second core, but at some stage it has to feed its output back into the main core. Think of HT as a pre-processor, not a true second core.The Pentium went to dual core, when the Pentium Ds came out which are a true dual core processor. This was followed by the Core 2 Duo.Your 3GHz CPU has plenty more power for FS than your cousin's 1.8 single core P4. There is talk that FSX may be patched to take better advantage of dual core processors, but until then performance is mostly determined by the single core speed.Gary