It doesn't seem to react to cable jiggling, but when I touch the caps, the squeal changes.

I'm confused about the whole 68040 clocking scheme. The upgrade card I purchased claims to have a 66/33mhz 68040 on it. A lot of the 040 Mac descriptions over at everymac.com say:

1. This model is sometimes designated as having a 66 MHz processor,

since the clock input runs at 66 MHz. However, the processor itself

is not "clock doubled", so technically it is only a 33 MHz processor.

Click to expand...

How does the processor not run at 66mhz if it's clock signal is 66mhz? When the first 486DX2's came out, it was truly a clock doubled processor, so how does the 68040 compare? Is my upgrade board a true 66mhz chip, (2x as fast as the LC580) or not?