DX4 overdrive?

Nop, 0,6um 3.3V i believe.

All Intel 486DX4 Overdrive CPU's had a 16KB L1 cache.
However, where the standard 486DX4 CPU's were 3.3V, the Overdrive DX4 CPU's were designed to be fitted to older 486 motherboards that only supported 5V CPU's.

or a you could use a converter with a voltage regulator like a evergreen or a tc to use any 3V cpu for a non intel flavour 5x86 amd or cyrix

OK 😄.

So, this overdrive have an integrated VRM under the heatsink?
this model i presume:
http://www.cpu-world.com/CPUs/80486u/Intel-DX4ODPR100.html

thk.