OMG what a paranoid question! 1.475v is the base setting. Because board VRM's and power supplies are never perfect, you'll never see a system that actually supplies it. In fact, you'll see various new board supplying 1.42v to 1.52v STOCK!
These things live fine with up to 1.70v. I recommend 1.50v for stock speed use or 1.65v for overclocking, these voltage won't even make the CPU hot, let alone hot enough to fry. Oh, and Tualatins have both overheat and overcurrent protection, so their nearly indestructable anyway.
The fact you're running a CPU at 1.70v proves you have a VRM 8.4 regulator, which supports voltages as low as 1.30v. I tried various things with mine, I underclocked my 1.2 to 800MHz and 1.30v, then used a Pentium 1 cooler for passive cooling, just to see if it was possible. Then I put the factory cooler back on and found the limit of that CPU to be around 1500MHz, which was less than ideal given the odd bus speed. I sold that and bought a 1.1 chip and overclocked that to 133MHz bus, 1466MHz CPU clock, on the stock cooler, at 1.65v, it ran cool and provided many months of 100% stable operation. I've had several other CPU's for customers, and every 1100 Tualatin Celeron I've seen has been able to reach 1466MHz without stress.
I push the overclocking issue because it allows faster CPU to RAM transfers and offers a HUGE increase in performance on many applications, as compared to a stock Celeron 1400.
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