Power consumption of 486 DX vs DX2

[Robert Perlstein]

I want to replace the 33 Mhz 486DX in my lap top with a 66Mhz 486
DX2. The lap top is a 5V based machine.

How much more heat and power does a 5V 66Mhz DX2 486 generate as
compared to the 5V 33Mhz 486 DX?

Heat and power consumption are important in this lap to
application. I'd like to eek a bit more performance out of my lap
top computer hence my wanting to upgrade the processor.

I can't fit a 5V to 3V conversion socket in this lap top- there
isn't room.

Any thoughts?

Many thanks.

--
"Knowing's easy.. people do that adnauseum. I just sort of hope."
-Bob Perlstein

[Aaron Ford]

I don't have the data books for those two cpus, are you sure that both
processors are PIN compatible and especially input & output timing
compatible? And if not, is there a configuration option on your laptops
mother board to select between them? If the answer is no or if you're
not sure, I wouldn't recommend trying it.

[Bill Rothanburg]

In message <4oom1d$q55$1...@mhadf.production.compuserve.com> - Robert Perlstein
<75347...@CompuServe.COM>1 Jun 1996 05:55:57 GMT writes:
:>
:>I want to replace the 33 Mhz 486DX in my lap top with a 66Mhz 486

:>DX2. The lap top is a 5V based machine.
:>
:>How much more heat and power does a 5V 66Mhz DX2 486 generate as
:>compared to the 5V 33Mhz 486 DX?
:>
:>Heat and power consumption are important in this lap to
:>application. I'd like to eek a bit more performance out of my lap
:>top computer hence my wanting to upgrade the processor.
:>
:>I can't fit a 5V to 3V conversion socket in this lap top- there
:>isn't room.

:>
:>
Robert,
In general, the 486DX-33 will draw less power than a 486DX2-66. However,
the actual power consumption will vary from part to part. I've had 486DX-33
CPUs that would only work reliably with a cooling fan. I had a 486DX2-66 that
was comfortable to touch with only a heatsink.

The good news - the typical 486DX2-66 Intel sells today probably draws less
power than the typical 486DX-33 available when your notebook was new.

The bad news - the 486DX-33 was probably selected for low power consumption.

Bill

[Sam Goldwasser]

The PGA versions are pin compatible. Whether that is what his laptop
has is another story. The newer ones no doubt use surface mount parts
to save space and cost.

Swapping a PGA type DX33 for a DX2-66 is just a part replacement - not even
any jumpers to change. It runs 2X internally but 1X to the bus.

--- sam