AMD Athlon 64 X2 4600+ Windsor 2.4GHz 2 x 512KB L2 Cache Socket AM2 Processor - OEMhttp://www.newegg.com/Product/Product.asp?...N82E16819103750Currently Im running a AMD 939 3200 CPU and a Asus N6600 Vid Card wit 1 gig ram....Looking to run FSX with it....

Wrong socket my friend. You need a 939 processor if you don't want to have to change motherboards too. This is the one you want: http://www.newegg.com/Product/Product.asp?...N82E16819103627My estimate is you'll get roughly a 30% increase in low-end FPS in FSX, based on 20% from the core speed increase over your 3200 + 10% for dual core use (yes FSX does use the second core, just not as much as most would hope). Gary

There would definitely be an improvement in your processing power, however FSX will not take advantage of the 2nd processor (yet!)... maybe with DX10 and Vista?The 2x 512M cache, may be a little low - but shouldn't put you off ! Check out http://www.xbitlabs.com for some useful comparison tests with 'Intel' and 'AMD' processors before upgrading.I am running a Core 2 machine with 2x 1G L2 cache and quite happy with the machine's performance running FS to date. In fairness FSX compares favorably with previous MS sims, in that expected performance always sucks in major autogen areas :) The video card will most likely be your deciding factor overall.gl