The i5 2500K is the chip you want, not an i7. The i7s have Hyperthreading, which most games can't really use - it increases heat and limits your overclocking maximum. You can turn off HT to eliminate that but then you effectively have an i5 and could have saved $100.

Hi Ryan nice to meet you, i have an i7 it runs very well with the ngx ,rex and orbx together it looks fantastic except the fan on my computer comes on and goes on like the clappers how do you turn off Hyperthreading please?many thanksjames.

As this thread is in relation to computer specs perhaps somebody may be able to shed some light on the problem I'm having with the pc shutting down without warning when running FSX. I thought this was initially due to the PMDG NGX as it was after some updates when the problem first appeared to arise, although I have also recently upgraded the MOBO and CPU to the specs below.Tonight I uninstalled every bit of software I could, basically leaving the pc pretty much running Vista alone. When I re-installed FSX, (this time keeping it away from the Program Files folder, which I've meant to do for some time), when I run FSX, no PMDG NGX installed the some problem occurs within minutes, the pc simply shuts down.I have a 600w psu, which I'm leaning to the believe is my problem, as from my experience usually when the pc simply shuts down it's either heat or power related.Last week I installed a new Cooler Master Hyper 212 EVO cooler so I don't beleive heat is the issue so now I'm leaning to the psu being the problem.I suppose my question is if I purchase a new case and/or psu what are my best options for the psu rating?Any opinions appreciated.

FSX can not make a PC shut down on its own, no matter how badly it behaves. What it can do is cause an overclocked CPU to overheat, or cause the system to draw more power then the PSU can provide. Either of which will kill your system.That said, running @4.7G with a 570HD on 600W was probably being overly optimistic, don't you think?I suggest you get one of the software tools the overclockers use to test stability and use it to diagnose what is actually wrong with your machine.Edit: Quote from EVGA web page:

RequirementsMinimum of a 550 power supply

Doesn't leave much for the rest of your system.

It appears the psu was on the way out......Replaced it yesterday, and upgraded to a 720w. Running fine now......

Even 720w is giving yourself very little headroom considering your GPU and OC'ing.

Even 720w is giving yourself very little headroom considering your GPU and OC'ing.

I've turned down the OC to auto. It's running at about 3.5 at altitude.Thing is replacing the psu has fixed the problem, and both FSX and NGX are working terrific......Do appreciate your i/p.

I have a lowly AMD Phenom II X4 970 running at stock 3.5 GHz, 890GTX chipset, with an AMD 6790 GPU, 8 Gb of main memory and 1 Gb graphics memory and FSX runs great! With the PMDG NGX I get 40-60 FPS.FSX itself runs at 1600x1200x32.Those of you who are getting stutters in FSX during disk activity are either running anti-virus or have a cheap chipset that means disk I/O interrupts other processing.Buying the fastest *most expensive* Intel processor is not the way to do it. Anyone else notice that those with an Intel chip have to overclock to get reasonable performance?Realize that FSX is a dog of a program, so get rid of the perf killers like traffic and AutoGen. I've flown online many times with up to 15 people in a session, all flying high detailed models (I have the same aircraft so see them correctly) and no perf hit as a result. We had 3 NGX in a session recently and again no perf hit. IT's not the 3D processing or the sheer number of 3D objects that are the issue - it is the underlying code that drives them that is poorly coded and kills the sim.Best regards,Robin.