Disclaimer: You're probably not going to like what you're about to read. Sorry about that, but I do have to be honest.
From: RockAndRoll Michigan
I can't run two clients on my computer anymore since I upgraded to a 6200 OC.
I'm curious how a 6200, overclocked or not, can qualify as an upgrade from anything. Not only is the GeForce 6 series five years and five generations out of date, the 6200 was the lowest level discrete card in the series. In case you didn't realize, with most nVidia cards, the second digit is the most important one. Anything x2xx is going to be extremely low end.
Unless what you had previously was a nothing but a couple of monkeys with chisels and stone tablets drawing your graphics for your computer, it's hard to imagine UPGRADING to a 6200. It would be serious downgrade from almost any other card you could imagine that would be in operation today. Out of curiosity, what did you have before?
In any case, overclocking almost always results in stability problems, unless you have considerable expertise in tuning computers as a whole, in addition to tuning any individual components. In my experience, it's just not worth messing with. Even my friends who are even geekier than I am try to avoid it.
The first place I'd start in trying to get the card working properly would be downlclock it back to standard nVidia specs. Once you've got it working at normal speed, then and only then should you experiment with overclocking.
From: RockAndRoll Michigan
Every time I try to, I end up having to kill power to the computer. I get a blue screen of death caused by the video card driver going into an endless loop every single time.
What are you defining as an "endless loop"? What exactly is it doing? What does BSOD actually say?
From: RockAndRoll Michigan
Today I actually got a new tip from Microsoft that has never shown up before as a result of this error. Turn off all hardware acceleration completely on the video card, so I did that. Only now SL won't run at all with the hardware acceleration turned off. I have to have it turned on just to run ONE client.
My guess would be the message is referring to instability caused by the overclocking. Most likely it's telling you to turn off hardware acceleration because the rest of the system can't handle what the card is doing.
This of course presents a serious problem because almost no 3D engine, including SL's, will run without hardware acceleration. That's precisely the reason we all put video cards in our computers in the first place.
From: RockAndRoll Michigan
What can I do to make this POS work with SL the way it's supposed to?
Again, I'd start by downclocking it back to standard spec. Next, uninstall your drivers, run DriverCleaner, and then install the most current driver for the 6 series you can get. I believe all cards in the 6, 7, 8, 9, and 200 series use the same drivers these days, so it shouldn't be too difficult to find what you need.
Really, though, my strongest suggestion is just to ditch the thing. If you purchased it recently, return to wherever it came from. I wouldn't even have recommended that card while it was current. But while back then, it was simply low end, now it's low-end AND 5 years old, which makes it orders of magnitude worse. Frankly, it would be something of a small miracle for it to handle anything as intensive as SL. Replace it with something better. Get the highest second digit you possibly can.
I'm guessing it's an AGP card? That of course narrows your possibilities considerably. I notice all the nVidia AGP cards NewEgg currently has available are 5200's and 6200's, save for one 5500, and I certainly would not recommend going all the way back to the 5 series. So you might be stuck. In that case, it's probably time to start thinking about a new computer.
From: RockAndRoll Michigan
LL and Nvidia need to start talking to each other and get this fixed.
Acutally, LL and nVidia talk all the time, from what I've been told. They're in pretty regular communication, which is one reason SL works so much better on nVidia hardware than on ATI hardware. But without a really good, solid, magic wand, there's not a whole lot to be done to make a resource-intensive program in 2009 work well (if at all) on hadware that is from 2004. Even modern high end cards have difficulty handing SL. It's not really fair to blame either company when something so hopelessly out of date proves to be not up to the task.