PowerColor HD 6850 PCS+ 1 GB Review 11

PowerColor HD 6850 PCS+ 1 GB Review

Value & Conclusion »

Overclocking

To find the maximum overclock of our card we used a combination of GPUTool and our benchmarking suite.
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.



The overclocks of our card are 950 MHz core (16% overclock) and 1160 MHz Memory (5% overclock). Those clock frequencies are pretty much spot on for what I'd expect for any typical HD 6850 card.

Overclocked Performance

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


The actual 3D performance gained from overclocking is 11.2%.

Temperatures


Temperatures are in a perfectly safe range. Personally I would have preferred a higher idle temp but less noise from the cooler. Also there seems a bit of extra headroom left in the "load" temperature.

Voltage Tuning

PowerColor's voltage regulator does not offer voltage control via I2C, so we could not test voltage tuning. Extremely motivated overclockers could still do a soldering voltmod, but that would void the warranty.

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 major 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)
Desktop100 MHz150 MHz0.97 V
Blu-ray Playback300 MHz1100 MHz1.15 V
3D Load820 MHz1100 MHz1.17 V

CCC Overdrive Limits
Core1000 MHz
Memory1250 MHz
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