AMD Phenom II X6 1075T, X4 970BE and Athlon II X4 645 processor review

Processors 196 Page 6 of 18 Published by


Power Consumption and Temperatures

Power Consumption and Temperatures

The two Phenom II processors tested today both have a respectable TDP (peak wattage) of 125 Watts, the Propus based Athlon II X4 processors have a TDP of 95 Watts.

Today's setup uses the ASUS Crosshair IV Formula motherboard on which we seated a dedicated graphics card (Radeon HD 5870), you'll notice that the end-result overall for idle and peak wattage remains good.

Have a look below to see how we measure and traumatize the processor. As you can see, once we stress all four CPU cores with Prime95 (stress test), our power consumption maxes out at 152 Watts for the Athlon II X4 645 and 175 Watts for the Phenom II X4 970.

We notice our test platform peak out at roughly 185 Watts power consumption when we stress the six CPU cores of the Phenom II X6 1075T. Our system idles merely at roughly 100 Watts depending on the OS energy saving setting. This is a complete PC with a high-end graphics card inserted (but GPU not stressed).

CPU + R5870 IDLE (Balanced) Idle (High perf)  100% CPU
890FX + Athlon II X4 645     73 88 152
890GX + X4 965 75 96 164
890FX + X4 970 81 92 175
890FX + X6 1055T 85 104 183
890FX + X6 1075T 87 109 182
890FX + X6 1095T 87 107 187
H55 +Core i7 870 115 170 218
X58 + Core i7 980X 139 150 272

When we place a couple of platforms in a chart and look at peak power consumption, we see the 890FX + Phenom II X6 1075T push onwards to 182 Watts when fully stressed, not bad really. Let's put the processor under heavy load and see how temperatures behave as well. BTW bear in mind that these tests are all very motherboard dependant and results can (and will) vary per PC.

Processor temperatures while idle remain below 30 Degrees C / 86 F based on air cooling for all three processors. We are cooling the processors with an OCZ Vendetta heatpipe based cooler only.

Peak temperatures remain really good as well, the temperatures of the Phenom II X6 1075T processor are just phenomenal at under 45 Degrees C. The same can be said for the X4 970 with nearly the same temperatures. This one with four cores stressed under Prime95 software only reached 43 Degrees C, similar to the Athlon II X4 645.

Let's go the next page and see where we end with our overclock.

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