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Originally Posted by daweinah With the increase vid card clocks, ATItool finds artifacts, but I don't notice any while gaming - should I lower the clock to make ATItool happy, or leave it since I can't tell? I don't want to endanger my card.

Try running a third party tool like 3DMark05 and check for artifacts.

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Originally Posted by daweinah -What is the memory divider thing, is that where I set how fast I want the RAM to run? (DDR400, DDR433, etc)

Your memory divider is the speed of your ram compared to that of your FSB.
For example if your FSB is running at 200 MHz and your RAM is running at 150 MHz then the divider (also known as FSB:RAM ratio would be 4:3). Yes this is where you can set the ram speed relatively to that of the FSB.

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Originally Posted by daweinah -The FSB is supposed to match the RAM clock right? I have DDR400, so what happens when I go over 200?

Your have DDR ram (Double Data Rate) which means your ram transmits datal on both edges of the signal. So if your ram speed is 400 MHz it means it's originally working at 400/2 = 200 MHz.
When you go over 200 MHz you are exceeding your ram's capacities.

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Originally Posted by daweinah -Why did my RAM timings go down the toilet? I just noticed that Everest says my Memory Bus is 238.6MHz and lists my ram as DDR477.. is this the max speed the ram can go, since its trying to catch up to the 250 FSB? Should I drop the FSB to 238 and increase the mult to 11?

As I said before you have DDR ram so when the original speed is 238.6 MHz it means your ram is transmitting data at 238.6 MHz x 2 - 477.2 MHz (thus the numbers you see above).
While on Intel based systems it's always best to have FSB speed match RAM speed (FSB:RAM = 1:1) this is not entirely true on AMD based systems.
On AMD systems it's better to keep your ram running on tight timings even if that means you have to set a divider because ram cannot keep up with the ever increasing FSB speed.

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Originally Posted by daweinah -Under Chipset Properties, it shows the Memory Timings at 3-4-4-9, but under SPD Memory Modules, it shows 3-3-3-8 @ 200Mhz; why is it different?

I assume it's because you took your ram higher than 200 MHz and thus it had to relax the timings to be able to run at higher clock speeds.
Try upping the voltage supplied to your ram modules a notch and see if you can run them at 3-3-3-8 with speeds such as 240 MHz.

 

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Originally Posted by daweinah So I'm definitely over 200 MHz, are there any warning signs I should watch out for, or a way to test the RAM's capability to handle a 250MHz FSB?

Use programs like Memtest86 and Prime95 to thoroughly test your new ram speeds/timings for stability.

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Originally Posted by daweinah If the original speed is DDR477, why was it manufacture rated DDR400? And why are my stock timings so much looser than they are supposed to be?

You misunderstood me here. Your DDR400 ram has an original factory speed of 200 MHz. What I meant was you were running it at 238 MHz originally.
Your stock timings are always looser than what they can really be. That is because in order for manufacturers to give you a warranty on a product and make sure it will run almost flawlessly they have to keep it within something like 80% of its full capacity.

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Originally Posted by daweinah Should I reset the CPU and GPU back to stock speeds, set the ram to DDR400 1T/2-3-3-6 like its rated for, and start OCing the CPU and GPU from there? What happens when the computer doesn't like the settings I put?

You should test each component (CPU, RAM, mobo) alone to determine its maximum overclockability.
I mean when you need to test your mobo what you should do is drastically loosen ram timings and drop your cpu multiplier to the lowest available. That way, when you reach an oc`ing limit you'll know the only culprit is the mobo.
Same goes for ram testing alone and the cpu as well.
When the computer doesn't like the settings you put then you most likely have to reset the bios.
This can be done in two ways:
1) Your mobo manufacturer gives you the choice to just shut down your machine (both frontal computer on/off and rear psu switch) and wait for a few seconds then turn it back on and everything will be reset.
2) You will have to:

a) shut down your machine.
b) remove your bios battery.
c) move the bios reset jumper from position 1-2 to position 2-3 and leave it there for 10 seconds.
d) move the bios jumper to position 1-2 again.
e) put the bios battery back on.
f) turn your pc on and everything will be reset.