wasn't saying you had junk RAM, but also it'd help if you had a sig with your comp details.
Anywho, it doesn't matter what kind of RAM you have. You get so far you're going to have to adjust RAM timings and voltages...so until you're ready to do that, just focus on obtaining the fastest CPU clock speed you can achieve.
I'd suggest putting the FSB down at 200 and figuring out your max stable CPU speed first, and then if you wish to increase your RAM speed, total FSB and all that, then do that later when you can focus solely and making sure the RAM is stable.
Assuming your chip is stock speed of 2GHz (not saying it is, but since you have no sig this is an example)
Start off with like 12x166 = 1.992GHz and just keep raising the FSB by 5Mhz increments until you can get up to 200, then you'll have 200x12 = 2.4GHz but along the way you need to check with prime95 for stability and make sure you up the Vcore accordingly.
Usually prime95 is like this:
1. Takes a few mins then displays an error = Barely need some more Vcore for Stability
2. You get an error immediately = You need probably atleast .075 raise in Vcore
3. Prime95 freezes as the testing begins = You need quite a bit more Vcore for stability and to get prime95 error free
4. Crashes during windows boot = Obviously quite far away from the needed Vcore amount
5. Your computer doesn't post = either you've found the CPU's max in clock speed, or you have no where near enough Vcore to offer stability to the current speed.
Once you hit 12x200 = 2.4GHz then knock the multiplier up to 14 and change the FSB to 170 for 14x170 = 2.380GHz and repeat the process. So if 2.4GHz wasn't your ceiling you can safely keep testing for the highest clock speed. Of course hitting 200 will be impossible in this situation unless you have like insane water cooling, but that'd be 2.8GHz which I doubt you'll hit.
So that way you'll be able to find your top CPU clock speed and then after you know that adjust your FSB and multiplier accordingly. After you've done that you can try OCing your RAM by raising the FSB past 200 and adjusting the multiplier so that you keep the same CPU clock speed