CPU Power Loss: 63.9 Watts Under Full Load
Our measurement confirms AMD’s TDP specifications. Under full load of all four CPU cores with Prime95, we measured a power consumption of 63.95 W. Our measurement also includes the power loss of the voltage stabilizers, so the Phenom X4 9100e actually consumes even less power.
In response to the many inquiries of our readers, we included Intel’s Core 2 Quad Q9450 in the power measurements. As we could only get hold of a 45 nm Intel CPU, the Core 2 Extreme QX9770, we simulated the Core 2 Quad Q9450. The freely selectable multiplier was set to 8.0 and the FSB to 333 MHz; the CPU’s core voltage was 1.2875 V. Our Core 2 Extreme QX9770 was a sample with C0 stepping.
Compared to the Phenom X3, which has one CPU core less, the low-power Phenom’s power consumption is approximately 10.5 W lower. Though the clock rate of the 9100e is 300 MHz below that of the Phenom X3, it also consumes less power at the same clock rate.
Compared to the other Phenom X4 CPUs, AMD’s Phenom 9100e succeeds in saving the power consumption equivalent of one CPU core.