Power Consumption (Idle and Gaming)
In order to get an idea of a GPU's power draw, we run our Unigine Valley 1.0 benchmark, which is our most GPU limited test. We use a watt meter to measure the maximum total system power draw during the test, and also take an idle reading at the Windows desktop (3,840 x 2,160).
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Asus GeForce GTX 970 DirectCU Mini 4GB
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AMD Radeon R9 Nano 4GB
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Nvidia GeForce GTX 980 4GB
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Sapphire Radeon R9 380 Nitro 4GB
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Sapphire Radeon R9 390 Nitro 8GB
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Sapphire Vapor-X R9 290X 4GB OC (reference clocks)
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Nvidia GeForce GTX 980 Ti 6GB
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AMD Radeon R9 Fury X 4GB
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Sapphire Radeon R9 Fury Tri-X 4GB
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MSI Radeon R9 390X Gaming 8GB
System Power Draw in Watts (lower is better)
Thermal Performance (Idle and Gaming)
Thermal output is also measured using Unigine's Valley 1.0 benchmark, as its DirectX 11 features will stress all parts of a modern GPU. The GPU is installed in a closed, but fairly well ventilated case (Corsair Graphite 760T) with HDD cages removed and the case fans at full speed. We leave all GPU fan profiles and settings as they come and leave the benchmark running for ten minutes so that temperatures plateau. We record the peak GPU temperature using GPU-Z, and present the data as the delta T (the difference between the GPU temperature and the ambient temperature in our labs). We also take an idle reading at the Windows desktop (3,840 x 2,160).
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AMD Radeon R9 Fury X 4GB
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Sapphire Radeon R9 390 Nitro 8GB
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Sapphire Radeon R9 380 Nitro 4GB
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Sapphire Vapor-X R9 290X 4GB OC (reference clocks)
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Asus GeForce GTX 970 DirectCU Mini 4GB
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Sapphire Radeon R9 Fury Tri-X 4GB
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AMD Radeon R9 Nano 4GB
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MSI Radeon R9 390X Gaming 8GB
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Nvidia GeForce GTX 980 4GB
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Nvidia GeForce GTX 980 Ti 6GB
Delta T in °C (lower is better)
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