Qooling quiz

MrSeanKon · 1 Jun 2007 at 09:10

First system's data:
Frequency1=2.9GHz, Vcore1=1.45Volts and temperature at full load 43C.
For frequency2=3GHz, Vcore2=1.53Volts the temperature is 47C.

Second system (similarly):
Frequency1=2.5GHz, Vcore1=1.4Volts, temperature1=36C.
Frequency2=2.7GHz, Vcore2=1.6Volts, temperature2=42C.

Which system has better cooling?

V|per · 1 Jun 2007 at 12:21

neither, mine does

(and without actually working anything out, they look to have pretty similar cooling, although i'd say the 2nd one has the best..)

MrSeanKon · 1 Jun 2007 at 12:36

You are right but I would like to know your thoughts.
Why you chose the second system? :rolleyes:

BEn_2600+ · 1 Jun 2007 at 12:44

Because it loads at 42 with 1.6v where as system 1 loads at 47 with 1.53v, the extra 300mhz wont make that much diff to the temps.

w3bbo · 1 Jun 2007 at 13:18

Unless they are both tested in the same room at the same time (same ambient temp) then comparison between the two is pointless.

MikeHunt79 · 1 Jun 2007 at 13:51

First one as it's the only one with full load?

MrSeanKon · 28 Jun 2007 at 13:02

We assume that both systems are at full load and same ambient temperature.
But this (the ambient temperature) does not matter in internals.

Raikiri · 28 Jun 2007 at 13:29

MrSeanKon said:
First system's data:
Frequency1=2.9GHz, Vcore1=1.45Volts and temperature at full load 43C.
For frequency2=3GHz, Vcore2=1.53Volts the temperature is 47C.

Second system (similarly):
Frequency1=2.5GHz, Vcore1=1.4Volts, temperature1=36C.
Frequency2=2.7GHz, Vcore2=1.6Volts, temperature2=42C.

Which system has better cooling?

Bold means better cooled.

The ambient temp does matter in internal as that will be the air which is drawn into the case, deciding what the minimum temp is. If the ambient is 40c for one and 20c for the other then one of them can potentially be 20c lower (obviously ignoring resistance of the cooler during the transfer of heat).

Chris Beard · 28 Jun 2007 at 15:19

Where did this question come from?

Full answer:
Temp is roughly v*v*f*c where c is a constant of a known value, v is votage and f is frequency. Hence increases in voltage have a much bigger impact than increases in frequency. System that is cooler with higher voltage is cooled better. This is the second system listed.