I have a 940BE and I couldn't be happier with it. IMO, it's retarded to buy a CPU and overclock it right away. I prefer to get a good CPU that I don't need to overclock and I overclock it when it starts to become too slow for the newer programs (which it certainly hasn't yet). Crysis runs perfectly along with everything else I've ever tried using it for. If you have to OC a CPU as soon as you buy it like some people here apparently do (God only knows why), that means you should have bought a better CPU to begin with but were too cheap or too poor to do so. Honestly, I think you should just stick with what you have, keeping in mind that the 810 is not considered obsolete by any stretch when one considers that there are still dual and triple core CPUs being sold by AMD and the Athlon II AM3 series is still inferior to the Phenom II AM2+ series in terms of performance. You have a Deneb Quad-Core CPU for Christ's sake! There's nothing wrong with what you have and I am forced to wonder why you want to upgrade a CPU that you probably have barely had for a year. If your machine seems slow, do other things like increasing your RAM, switching to W7 x64, making sure that your registry is clean, etc. If none of those work, overclock your 810 to a speed that has been reported as low stable and inch your way up. At 3.0GHz, you'll be at the same speed of a 940 anyway and a 400MHz OC is by no means hard to do on a Deneb CPU. Here are some questions that should have been asked but haven't yet for some reason:
1.) What OS are you using?
(If you have "Beelzebub's Operating System of the Damned, aka Vista, that's your real problem! Also, you should use Windows 7 x64 if possible so you can use more RAM than 3.25GB)
2.) How much RAM do you have and what is the speed?
(530, 667, 800, 1000, 1066)
3.) What are your hard drive specs and is it properly defragged?
(RPM, seek time, brand, capacity) - Defragging should be done with piriform defraggler, windows defrag sucks
4.) Do you keep your registry and temp directories clean with CCleaner and RegScrubVistaXP? (Don't use those on Windows 7)
5.) Do you have a ton of programs loaded into memory that you never use?
6.) What GPU do you have?
All of these questions point directly to things that affect your system performance. They need to be addressed because if there's a problem with one of these, then your upgrade to a 940 might make little to no difference and that would truly suck.
The last and most important questions are:
7.) What exactly is your budget (and in what currency)?
8.) Why do you want to upgrade? Is your computer slow or are you just trying to keep up with the Joneses on tomshardware? If it's the latter, you're wasting your time. Answer me all the questions I asked and I'll be better able to give you an answer that will help rather than just guessing.