Edit: I found something interesting that I thought I should share. It indeed seems to be a power supply issue. I have a 300W power supply, and it does not seem to be enough to go as far as I want it to. Apparently, when I have 100% CPU usage (United Devices cracking away), the voltage is stagnant at 1.48 to 1.50, even if I set it to 1.55 V. However, if I shut off United Devices and have a lot of idle CPU cycles, the voltage increases to 1.52-1.55, and I get no random application crashes. I think that I will invest in a 400+W power supply and see if it makes my overclocking more successful. PS- Thanks to jiffylube1024 for his suggestions on the matter.
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What 33 Mhz more means that everything in your machine is running at spec except the CPU. At 133 MHz FSB, your PCI is a perfect 33 MHz (33.33333 really) and your AGP is 66 MHz. That's why the 1.6a is such a perfect chip, you can o/c it to 2.13 pretty much every time, and keep everything else in the system at the speeds they're supposed to run. >>
Agreed, however I go by stability. I forgot to mention that I tried to bump the voltage by .025 volts and boot at 133 again, but got more problems doing so. Three apps randomly crashed without warning.
<< As for not upping the voltage, and instead seeking better cooling to reach 2.13 GHz, well, you're probably not going to hit 2.13 with all the cooling in the world, you have to up the voltage to reach the speed, it's the low voltage that's keeping you back! A .05 voltage increase would probably be sufficient, you're going to have to do it one way or another. >>
I'm not convinced that all of the cooling in the world isn't going to make a difference, but I do agree with you that it's probably not an overheating issue. I might just try the .05 voltage increase, but I'll pay real careful attention, because random apps crashing = not good.
<< As for a .05 voltage increase significantly decreasing the life of your CPU, that's a crock, the CPU should run fine for years and years. >>
I don't really feel that way, but I just feel that if it is unnecessary, it should be avoided. The way I see it is, if I'm going to up the voltage, I might as well run everything above spec. Quite frankly, running things not at spec hasn't caused a single problem, whether it was 110, 115, 120, 125, or 130 MHz FSB. So I'm not worried about that. Voltage does concern me, but I agree that a .05 voltage increase won't (or, at least, shouldn't) harm the CPU.
But thank you for your feedback, it has encouraged me to try a few more combinations.