Overclocking
The overclocking results listed in this section were achieved with the default fan and voltage settings as defined in the VGA BIOS. Please note that every single sample overclocks differently which is why our results here can only serve as a guideline for what you can expect from your card.
Overclocking with the normal 925 MHz BIOS did not work. The second GPU was stuck at 925 MHz all the time, even with ULPS disabled. Switching to the 1000 MHz turbo BIOS fixed that, and all our OC results are with that BIOS.
The maximum stable clocks of our card are 1085 MHz core (9% overclock) and 1740 MHz memory (27% overclock).
Its Overclocking potential is quite nice, but wouldn't be possible if we hadn't fixed its too low cooler-mounting pressure.
Maximum Overclock Comparison |
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| Max. GPU Clock | Max. Memory Clock | Max. OC Perf. |
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PowerColor HD 7990 Devil 13 | 1085 MHz | 1740 MHz | 147.1 FPS |
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GTX 690 | 1090 MHz | 1805 MHz | 149.2 FPS |
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HD 7970 | 1075 MHz | 1715 MHz | |
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HD 7970 GHz | 1185 MHz | 1635 MHz | 78.0 FPS |
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Important: Each GPU (including each GPU of the same make and model) will
overclock slightly differently based on random production variances. This table
just serves to provide a list of typical overclocks for similar cards, determined
during TPU review.
Using these clock frequencies, we ran a quick test of
Battlefield 3 to evaluate the gains from overclocking.
Actual 3D performance gained from overclocking is 16.7%.