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AMD Phenom II X6 1055T & 1090T Six-Core Processors Review

Author: MAC
Date: April 26, 2010
Product Name: AMD Phenom II X6 1055T & 1090T Processors
 
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Power Consumption / Temperature Testing



Power Consumption



For this section, every energy saving feature was enabled in the respective BIOSes and the Windows Vista power plan was changed from High Performance to Balanced.

For our idle test, we let the system idle for 15 minutes and measured the peak wattage through our UPM EM100 power meter.

For our CPU load test, we ran Prime 95 In-place large FFTs on all available threads for 15 minutes, measuring the peak wattage via the UPM EM100 power meter.

For our overall system load test, we ran Prime 95 In-place large FFTs on all available threads for 15 minutes, while simultaneously loading the GPU with OCCT v3.1.0 GPU:OCCT stress test at 1680x1050@60Hz in full screen mode.


As you can see, AMD have done a remarkably good job of keeping power consumption in check.
Despite 50% more cores, and 50% more cache, the two Phenom II X6 chips utilize just a tiny bit more power than the Phenom II X4's in both idle and load conditions. As we stated previously, that is a testament to GlobalFoundries' manufacturing prowess, since they managed to fit six highly clocked cores under a very reasonable power envelope utilizing the 45nm process.

As impressed as we are with the power consumption, these new processors certainly don't take the performance-per-watt crown from the Lynnfield-based chips, much less the 32nm i7-980X über-processor.


Temperature Testing



For the temperature testing, we used both the stock AMD CPU cooler and a Thermalright Ultra-120 Extreme (TRUE). The system was left to idle for 15 minutes, and then we ran Prime 95 In-place large FFTs for 15 minutes. The ambient temperature was 23°C/73.4°F. Keep in mind that the thermal sensors in most modern processors are not really accurate at measuring idle temperatures, hence the very small delta between the room temp and the idle results.


First and foremost we have to restate the fact that it is difficult to get accurate temperature readings from AMD Phenom II X6 processors since their internal diodes are way off the mark. Using trusted programs like Core Temp or AMD's own OverDrive utility will gave us sub-ambient temps at idle and full load temps that never exceeded 32C. Having said that, A.O.D does have a 'CPU Temperature' reading in the 'Board Status' section that seems slightly more accurate than the individual core temperature readings in the 'CPU Status' section. In our opinion, the above temperatures are still probably 10-15C lower than actual. Nevertheless, these new six-core processors do appear to run very cool indeed, we really couldn't feel much heat radiating from the heatsinks.
 
 
 

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