Temperatures
We also tested the Vortex II feature that lets you adjust the distance of the fan from the card by rotating it. No matter what configuration, we only saw very tiny differences that can barely be measured and certainly have no impact on everyday use.
GPU Temperature Comparison |
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| Idle | Load |
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PowerColor HD 7870 Vortex | 37°C | 68°C |
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Sapphire HD 7870 Flex | 34°C | 63°C |
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MSI HD 7870 HAWK | 32°C | 76°C |
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MSI HD 7870 TF III OC | 37°C | 69°C |
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ASUS HD 7870 DC II | 33°C | 75°C |
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AMD HD 7870 | 29°C | 69°C |
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Important: GPU temperature will vary depending on clock speed, voltage settings,
cooler design, and production variances. This table just serves to provide
a list of typical temperatures for similar cards, determined during TPU review.
Clock Profiles
Modern graphics cards have several clock profiles that are selected to balance power draw and performance requirements.
The following table lists the clock settings for important performance scenarios, and the GPU voltage that we measured. We performed the measurement on the pins of a coil or a capacitor near the GPU voltage regulator.
| Core Clock | Memory Clock | GPU Voltage (measured) |
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Desktop | 300 MHz | 150 MHz | 0.82 V |
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Multi-Monitor | 400 MHz | 1250 MHz | 1.26 V |
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Blu-ray Playback | 1150 MHz | 1250 MHz | 1.25 V |
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3D Load | 1150 MHz | 1250 MHz | 1.22 V |
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CCC Overdrive Limits |
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Core | 1400 MHz |
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Memory | 1450 MHz |
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