When you say "little difference" what do you mean by that? What was the difference?

 

You should test under full load with a stress test and compare temps with HT on and off.

 

I would be surprised if the difference is much less than 10 degrees.

 

I have made a test with OCCT and CPUID monitor with HT enabled. Correct the temperatures reached a maximum of 88 C i.e very close to but still below

the max allowed 92C. Also when flightsimming the temperature goes up for longer flight. In short testflight the difference didn't show up.

When you say "little difference" what do you mean by that? What was the difference?

 

You should test under full load with a stress test and compare temps with HT on and off.

 

I would be surprised if the difference is much less than 10 degrees.

 

Running OCCT CPU Linpack at 4.3 the average difference is about five degrees, 78 vs 83.

This is with a H110 water cooler.

Maybe at a higher overclock the difference would be greater.

 

gb.

Right, would be higher with greater overclock. In addition, Haswell architecture may be differently compared to my Ivy Bridge.

Generally Windows does a god job of organising threads across logical processors (LPs). However, one thing to keep in mind with HT on, is that [depending on the system state] FSX can fail to distribute correctly across the LPs every time FSX is started. Checking with Task Manager -> performance, this can show up as two LPs on the same core maxed out - in the sim, manifests itself as periodic short hops or stutters. The FSX Affinity Mask setting can be used to help Windows separate out the threads across physical cores. An example with a 4/8 processor CPU set to HT ON; setting up the FSX AM to 85 = 01010101 (or 170 = 10101010) = helps Windows keep FSX threads to separate cores.