I think we discuss this topic in another topic before.Some fans said that you may get a higher maximum fps by using a higher speed duo core cpuBut the fps is more stable when using a quad core cpu with lower speed.XT Yu,Uk

I think we discuss this topic in another topic before.Some fans said that you may get a higher maximum fps by using a higher speed duo core cpuBut the fps is more stable when using a quad core cpu with lower speed.XT Yu,Uk

I think we discuss this topic in another topic before.Some fans said that you may get a higher maximum fps by using a higher speed duo core cpuBut the fps is more stable when using a quad core cpu with lower speed.XT Yu,Uk

Yu Uk - My recent side-to-side testing (yesterday) indicates otherwise. Quad core comes out on top in every scenario - even when the dual-core has a "higher" Ghz. Check my prior post - I took a pretty thorough look, used real computers and actual rigorous testing to arrive at this repeatable conclusion. I can comfortable state it now as a "fact": Quad Core over Dual Core for FSX.Happy flying!Cheers!

FSX does benefit by as many true cores as you can throw at it. It does not benefit much (if at all) from hyperthreading (too many 'collisions' I hear - data & instruction collisions, not airplanes!).So, as an example, on my i7 920, Performance will show 8 cores, only 4 are 'true', physical cores and FSX will use all 4 'true' (physical cores) to the best of its ability. The key here is to recall that "hyperthreading" is really a 'virtual core', not a physical one.Hope this helps clear up any confusion!...without creating more. Bottom line: more cores, i.e. Quad, or the upcoming Six core and in the future more cores (I believe FSX sp2 can explicitly schedule 32 cores with no user intervention or tweaking). Again, whole history FSX from beginning through to Acceleration - from the folks who wrote the program please reference http://blogs.msdn.com/ptaylor/ it is the definitive, authorative resource on FSX.Happy flying!Cheers!

This collision problem can be fixed by setting the affinity mask at 85 on the corei7 with hyperthreading enabled. Worked like a champ for me.

This collision problem can be fixed by setting the affinity mask at 85 on the corei7 with hyperthreading enabled. Worked like a champ for me.

Hmmm...never tried that - I'll certainly give it a shot and see what affect it has.Thanks, Scott!

Hmmm...never tried that - I'll certainly give it a shot and see what affect it has.Thanks, Scott!

Patrick, I would be curious to know how it works for you. With that affinity mask, it forces FSX to use the physical cores and you have the added benefit of not having to turn off hyperthreading. It is quite interesting to see in task manager. :)

DmitriyI also have the same CPU and motherboard and I run my computer totally stable at 3,8 GHz with a Zalman CPU cooler. The cooler is pretty big, but as far as I can tell it has received great reviews and I have no complaint:http://www.kitte.ax/zalman.jpgMy RAM memory is Corsair Dominator Intel Core i7 6GB Kit PC3-12800.I just made a few changes in the BIOS under AI Tweaker (you have to set AI Overclock Tuner to manual first):BLCK Frequency 190DRAM Frequency DDR3.1523CPU voltage 1.35QPI/DRAM Voltage 1.35DRAM Bus voltage 1.35That's it! I first ran the computer with my old Nvidia 8800GT video card and 500 W PSU but when I put in the Asus EAH5870 I would get into trouble so I bought a 850 W PSU instead and have no problem since that.

Heya Krister, My apologies to my earlier post a few weeks ago. I did some reading last night and tried some new overclocks in hopes to get my memory timings down and this overclock is the balz!To shed more light on a couple missing parameters, my exact settings are:Set Bios to XMP modeMulti = 20BCLK = 190Hyperthreading = OnTurbo = OnCPU Volt = 1.35Dram freq= 1523Dram Volt = 1.64Dram timing set automatically due to bios set to XMP mode (8-8-8-24)Staying in the mid 40c's with a ARCTIC COOLING Freezer 7. I have the same 3.8 on the cpu but turbo mode on and memory timings are much better and just as stable as can be after hours of testing with Prime95. Gave me a nice boost in FSX also (10+fps).Thanks and sorry again for my ignorance :)

Dan, that's cool! :( Actually I got a bit bewildered when you and Patrick warned me about using turbo mode! Turned out the BIOS I was using then didn't even have that option (which I thought every mobo for i7 did!)while the one (the latest) I use now does. Anyway, I am very much an OC novice - the sheer number of articles on how easy it is to have a stable and overclocked i7 920 simply convinced me. My overclock settings are copied from this article in case you are interested in their findings: http://www.xbitlabs.com/articles/cpu/displ...locking_11.htmlI do get much higher temps than you (I've seen 77C as the extreme) and usually around 50C - still far from the 100C which is the max limit according to the article: "Looks like 3.8GHz frequency is the maximum our test Core i7-920 processor can do, even though the temperature of the hottest CPU core during our stability tests reached only 86