ASUS Radeon HD 7770 DirectCU 1 GB Review 5

ASUS Radeon HD 7770 DirectCU 1 GB Review

Value & Conclusion »


The overclocks 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, that's why our results here can only serve as a guideline for what you can expect from your card.

Maximum stable clocks of our card are 1185 MHz core (6% overclock) and 1510 MHz Memory (31% overclock).

Great GPU overclocking. 1185 MHz is the highest clock we have seen on the six cards reviewed today. Unfortunately memory OC does not work so well. 1510 MHz is the lowest result seen today.

Overclocked Performance

Using these clock frequencies we ran a quick test of Call of Duty 4 to evaluate the gains from overclocking.

Actual 3D performance gained from overclocking is 9.8%.


Temperatures are low across the board, everything good here.

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.

GPU Voltage
Desktop300 MHz150 MHz0.90 V
Multi-Monitor300 MHz1150 MHz0.98 V
Blu-ray Playback1120 MHz1150 MHz1.01 V
3D Load1120 MHz1150 MHz1.02 V

CCC Overdrive Limits
Core1300 MHz
Memory1300 MHz
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