I told myself I wouldn't do it but yesterday afternoon I buckled and ordered Acceleration from Amazon. I reinstalled FSX last night and left it all ready for Acceleration.
The DVD arrived in the post this morning, and I installed it into FSX, applied a few tweaks from other forums, and I also installed all the mesh from my FS Genesis DVD collection. Here's my very subjective opinion after a few hours of messing around with it:
First of all my system isn't a super duper earth shattering setup of Skynet proportions. It's a one month old laptop, Intel Core 2 Duo T7500 (2.2Ghz), 2 GB RAM, with an ATI HD2600XT 26MB DX10 graphics card (running the latest Catalyst 7.10 drivers which have been received with much praise by FS users with ATI cards)... I have both FS9 and FSX running on a 120GB external HDD connected via USB and using NTFS file compression (so I can squeeze as much stuff as I can onto the little HDD). I'm running FSX at 1680x1050 resolution on a 20" laptop display, with 2x FSAA and 8x AF. My laptop is no slouch, but it can't run the latest and greatest stuff at maximum detail (mainly due to the graphics card being a middle of the road one) and it's definitely not in the same league as some of the quad core monsters running top of the line graphics cards that some people have.
First up, the DX10 "Preview". I enabled the DX10 mode on my system and the framerate was atrocious. Not only was it low, around 10fps, but was also fluctuating wildly and the sim was totally unflyable for me. I disabled the DX10 mode and tried again in DX9...
...MUCH better!
I have the LOD radius set to high, mesh complexity at 100%, 10m resolution mesh, 1m ground textures, and scenery complexity and autogen set to maximum. Aircraft detail is set to "Ultra High" but self shadows, bloom and complex animations are disabled. I have my FPS lock set at 30FPS (see note below). In the cockpit the framerate counter seems to fluctuate between 15 and 31fps, but the sim itself seems to be very smooth. On external views the framerate stays at 31fps, but the movement seems to stutter a little. What I've noticed is if I stop looking at the framerate counter and turn the bloody thing off I'm actually pretty happy with the performance now!
As for the content side of things, I've tried a few of the missions with the Merlin and they are quite fun, but the displays in the Merlin cockpit are impossible to read unless you zoom the view in quite a bit. I tried the Reno Air Race in the Mustang and that was quite good fun as well. I haven't tried any of the other missions yet, but I will at some point... they may not be realistic for the anally retentive types, but they are fun... and that is the point of all this, innit?
Having a look around the various forums, it seems Acceleration/SP2 has broken compatibility with all aircraft models that were developed with the FS9 SDK. Unless an aircraft was developed 100% from the ground up for FSX it will have problems. People are reporting problems with opaque cockpit transparancies, translucent panels, aircraft parts, etc. A lot of people also report problems with addon aircraft in DX10 mode like missing textures. I think Aces have really dropped the ball here, as most addon aircraft for FSX are actually ports of earlier FS9 models, and now they won't work properly... So what we have is a patch that has now broken compatibility with most addon aircraft out there at the moment! :roll:
FS9 will still remain my main sim, as it runs beautifully with the plethora of aircraft and sceneries I have installed. I think I'll use FSX as a diversion when I want to try something different. I've found myself quite enjoying virtual bush flying in Alaska and Canada, so I'll install the Scenery Tech Landclass and Ultimate Terrain X to get some very nice landscapes, and I'll also reinstall the Aerosoft Beaver X and hopefully I'll have my sim of choice for bush flying :flying:
So, the conclusion is FS9 is still the top dog as far as I'm concerned, there is no chance of it being superceded on my system for a long time yet. For me at least Acceleration has improved FSX to the point where I actually enjoy enough to keep it on my HDD
NOTE:
I found an interesting post on another forum about the interaction between the framerate lock, vertical sync and LCD displays. Basically, if you have an LCD display that has a refresh rate of 60Hz (and I believe most if not all of them do) then you should set the "Vertical Sync" to "Application Controlled" in your driver settings, and once in FS set the framerate lock to either 30, 60 or unlimited. Apparently an LCD monitor can only display a steady framerate that is a multiple of the refresh rate... I tried all three and found 30FPS lock gave the best results for me. Might just be a placebo though, it was just a subjective impression after a couple of short flights. Give it a try, it can't hurt your PC...