Watercooled Dual2.5GHz-PowerMac is LOUD!
German Computer magazine c't tested the 2.5GHz PowerMac in its latest issue. According to the review there it gives a good 25% performance increase, somteimes even more - thus scaling perfectly with 25% more clock frequency. But soundwise it is about TWICE as loud as the Dual 2.0 GHz Powermac (5.1 Sone vs. 2.5 Sone, with Sone scaling linear). They say that the noise itself is not that disturbing due to the frequencies, but still... i'm a little bit disappointed
So the watercooling unfortunately does NOT give noise reduction, but noise increase instead! However, if i recall that article correctly they said one of the main reason was that compared to the 2.0-Dualie the fans on the 2.5PM start earlier and run faster to shuffle out all that heat from the housing. So the watercooling system itself (like pumps etc.) is not to blame.
If anyone wants more information, let me know and i can look it up (the test was roughly 2 A4 pages in length).
Ciao
Neodym
(waiting for the next PM revision)
Sped said:I don't think you can separate the two. To say the liquid cooling system was not necessary for cooling and then to say only a few sentences later that Apple balances silence and specs is contradictory. You make the point brilliantly that the liquid system is for cooling AND noise.
German Computer magazine c't tested the 2.5GHz PowerMac in its latest issue. According to the review there it gives a good 25% performance increase, somteimes even more - thus scaling perfectly with 25% more clock frequency. But soundwise it is about TWICE as loud as the Dual 2.0 GHz Powermac (5.1 Sone vs. 2.5 Sone, with Sone scaling linear). They say that the noise itself is not that disturbing due to the frequencies, but still... i'm a little bit disappointed
So the watercooling unfortunately does NOT give noise reduction, but noise increase instead! However, if i recall that article correctly they said one of the main reason was that compared to the 2.0-Dualie the fans on the 2.5PM start earlier and run faster to shuffle out all that heat from the housing. So the watercooling system itself (like pumps etc.) is not to blame.
If anyone wants more information, let me know and i can look it up (the test was roughly 2 A4 pages in length).
Ciao
Neodym
(waiting for the next PM revision)