Power And Temperature
Both of the platforms tested for this article employ an 84 W host processor. The GeForce GTX 770 peaks in the 195 W range, though, while the new GeForce GTX 970 has a lower 145 Watt TDP.
The numbers suggest we should see a ~50 Watt difference between the two under a graphics load, but in reality there's a whopping 90 Watt gap. It's likely that the overclocked GeForce GTX 770 in our previous build had some extra TDP headroom from the factory.
When it comes to temperatures, the GPU results aren't particularly surprising, with the GeForce GTX 970 sporting a much smaller cooling area compared to the larger 770. The difference under a CPU load is quite large though, but keep in mind that the previous build benefited from one of the best air-coolers that money can buy.