MSI Radeon HD 7970 Lightning 3 GB Review 51

MSI Radeon HD 7970 Lightning 3 GB Review

Value & Conclusion »

Temperatures



Idle temperatures are great, combined with the low noise this is a winning combination.

Load temps look to be well optimized and still leave some headroom for heavy overclocking and overvolting. Given these temps, it looks like the super-noisy fan is just a result of the increased power draw caused by the high clock speeds. MSI simply had no choice other than to make the fan run so fast, to keep the card at acceptable temperature levels.

GPU Temperature Comparison
IdleLoad
MSI HD 7970 Lightning39°C76°C
AMD HD 797045°C78°C
AMD HD 795043°C75°C
MSI HD 7950 TwinFrozr III32°C59°C
GeForce GTX 68045°C85°C
Important: GPU temperature will vary depending on clocks, voltage,
cooler design and production variances. This table just serves to provide
a list of typical temperatures for similar cards, reached 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 measure on the pins of a coil or capacitor near the GPU voltage regulator.

Core
Clock
Memory
Clock
GPU Voltage
(measured)
Desktop300 MHz150 MHz0.86 V
Multi-Monitor500 MHz1400 MHz1.18 V
Blu-ray Playback500 MHz1375 MHz0.96 V
3D Load1070 MHz1400 MHz1.15 V

CCC Overdrive Limits
Core1300 MHz
Memory1600 MHz
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