2.6 Ghz P4, 512 MB RAM, Radeon 9800 Pro, 80 gig drive with 20 gigs of free space..
It was already worn out when I got it and I have worked it to death.
I am going to try to increase the RAM as much as I can, depending on price. Hopefully, that will make a noticible difference.
Hello Larry...
In some respects your system is better than mine, but ALL my sliders are at Max, ALL the Boxes ticked, etc, giving me fantastic Scenery all around me, (with Freeware add-on scenery and various effects), SMOOTH flights with max AI Traffic and fancy Clouds, and I have no need to upgrade my System for FS 2004*...
...it runs a treat!
...and no problems in Multiplayer!
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Home built.
Case: Horizontal Office Desktop...(easy to get at!).
Processor: (ancient!) Socket A Athlon XP Thoroughbred 2600+ (2.1 GHz). (Old faithful, runs HOT!)
Graphics: AGP. nVidia Ge-Force 78000 GS 265 MB. (The last, and fastest of the AGP series).
Memory: 2 GB. (Essential!)
Hard Drives: 256 GB + 80 GB. (Plenty of spare/free space for page swapping!).
CD.
DVD.
Floppy Drive. (Little darling!)
Sound: Creative Labs 1024 Sound Card, with Surround Speakers.
Power Supply: 700 Watt Storm. (Needed!)
External Zoom Broadband USB Modem. (NO ROUTER!).
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There you go!
Not fantastic, but it runs FS 2004 absolutely flat out...with NO overclocking or tweaking!.... [smiley=2vrolijk_08.gif]...!
I am a happy Bunny!..

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Paul...G-BPLF..FS 2004...and a real smoothy!... 8-)...!
*....you can see from my Specs, why I don't use my copy of FSX...

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.