Celeron 300A question ?

[minoukat]

Does the Celeron 300A, or any other Mandocino (or how it's spelled) have a thermal sensor on-die ?

[D2DM]

No.
Mendocino cores don't have that.

[minoukat]

and what's the main differences between the Mendocino and the Coppermine celerons ?

[D2DM]

well..

The differences:
Mendocino: 0.25micron, L2 latency 5, Celeron only (meaning 128kb L2 only), up to 533mhz and always 66mhz fsb stock.

Coppermine: 0.18micron, lower latency for P3 class coppermines (P3 meaning 256kb L2) The P3 have higher L2 associativity too btw.
, supports SSE instruction set, 533mhz and higher, 100 and 133mhz fsb stock.


Things that may differ but I'm not sure about:
Possibly a broader L2 datapath for the coppermine core (Coppermine = 256bits wide)
Possibly a lower latency for Celeron coppermines...
(P3 coppermines is definately lower.. Celerons not sure)

---------
hehe fast reply. :)

[minoukat]

Thanks ! :D

[Monaco]

Um-

I have a 300A running right now. It does in fact have a thermal sensor. I believe it was Covington-type Celerons lacked the sensor, but I can't recall for sure.

The real difference between Mendos and Coppers= SSE registers, and packaging. But moslty the packaging. Tons of other things like voltage, die process, FSB, etc, but in terms of performance it is the same exact chip at different clock speeds. Same latency, same associativity, all that.

Excluding the new MMX/SSE registers and clock speeds, a P3 1000 is fundamentally identical to a P55C 166mhz Pentium Pro. Scary, huh? :D

take a look at Intel document 246358-019, the Celeron datasheet, for a second opinion.

[D2DM]

Seems you're right Monster..

btw it's http://www.intel.com/design/celeron/datashts/243658.htm
Switched the 36.


But can it be read out with motherboardmonitor?
My p2b + P2-350 and bh6 + C450a refuse..

Maybe a thermal diode on mendocino is something different than the diode (sensor?) on cumine..

[Monaco]

Switched the 36.

Oops! Good spot there dude.

MBM can only read a specific group of hardware monitoring ICs on you motherboard- if you have a monitor IC that MBM hasn't heard of, it won't be able to read it.

Also- some cheap motherboards lack the sensor IC entirely. There ain't no chip to read the temp off the CPU and report it to Windows, so it looks as if there is no thermal monitoring. Try a different temp monitoring program, that might work.

Same diode and same diode output pins are read for both chip types. Just in a different place on the packaging.