A atitude de "postar" num forum as verdades é um pouco ingrata e de má etica, mas é a verdade.
Já li tudo e estou totalmente de acordo com a Asetek, é vergonhoso as jogadas de marketing que a Nventiv têm feito relativamente ao seu produto topo de gama, a Mach2...
Curiosamente no outro dia tive a brincar com uma e reparei em muita coisa:
- Qualidade de construção inferior;
- Leitura de temperatura mt incorrecta;
- Oscilação de temperatura enorme;
- Preço excessivo para o que se paga (tendo em conta que uma Mach2 custa -30/45% a fabricar que uma Mach1 original).
Quanto a questão em discussão, acho que é um assunto extremamente interessante, e realmente é verdade o que se fala, a Xtreme é um forum Pró-Prometeia!
Quanto ao assunto em essencial:
---------------------------- summary of test report -------------------------
According to nVENTIV’s claims on their web site , the MACHII should be capable of: “cooling a CPU with full load down to approximately –45 degrees”
Further down this site under "cooling performance" It’s stated that: “The nVENTIV Mach II is optimised for maintaining below -50C”
Under “Power Consumption” It’s stated: “The Compressor consumes 170W at full CPU workload”
Test set up
In order to test the actual values a standard MACHII unit was set up with an external PC running Windows XP with Prometeia Control Centre 1.21 installed and connected via the a USB cable to the MACHII unit. Instead of installing the evaporator on the CPU in the PC, the evaporator was installed on a thermal CPU-dummy, capable of varying the load on the evaporator. The installation is showed on the picture below. All temperatures were recorded with a TM ELECTRONICS MM2020 digital thermometer with type-K sensors. The accuracy is 0.1% ±0.2°C (Documentation here ). The sensor is located inside the CPU-kit and attached to the evaporator.
Temperatures at 0W evaporator-load.
The system was powered up, and the true 0W temperature of the MACHII evaporator was –41.6°C, while the Prometeia Control Centre showed -57°C. The difference between the true temperature, and the Control Centre is 15.4°C, which equals a 37% error.
Temperatures at 100W evaporator-load.
100W is applied to the CPU-dummy that is attached to the evaporator, which equals a slightly overclocked CPU at full load. The actual temperature was –24.3°C, while the Prometeia Control Centre showed -37°C. The difference between the true temperature, and the Control Centre is 12.7°C, which equals a 52% error.
Power consumption.
The MACHII unit uses a Danfoss NL11F compressor. As is can be seen in the datasheet for this compressor, at a -23°C evaporator temperature the compressor uses at least 50W more of power than specified by nVENTIV. Furthermore the total power consumption of the MACHII was measured. The total power consumption of the unit was measured to366W
Conclusion
When you buy an nVENTIV MACHII unit, you get the impression, that the unit is capable of sustaining a temperature at below -50°C under normal use, and -45°C under full CPU-load. Furthermore you expect the power consumption to be 170W. These are the specs listed at nVENTIV’S web site.
As shown, those claims are very wrong, and far from the truth. The Prometeia software/display shows as much as 50% wrong, and the total power consumption is 115% higher than listed on nVENTIV’S web site.
-------------------------summary of test report end ----------------
Como podem ver, existe um erro enorme de leitura da temperatura, para além de indicarem que o consumo electrico da prometeia é um, e na realidade é o Dobro do anunciado.
Relativamente ao produto novo da Asetek, estou ansioso por experimentar um, e quem sabe, ficar com um!
O kit de cpu da Asetek sempre foi muito facil de instalar, este parece ser facílimo, para além de que este não é preciso forçar a manga, já que é ajustavem 360ºc!
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