Asus Radeon HD 4870 Matrix

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Asus' iTracker Application

The most exciting and innovative feature of this Matrix card is the functionality provided by Asus' iTracker application. It allows the user to change GPU and memory clock speeds, voltages, and fan control settings.


iTracker Default profile page.

iTracker comes with four preset modes — Optimized, Gaming, Default, and Power Saving, with both 2D and 3D settings available. Surprisingly frequency and voltage manipulation hasn't been crippled as the GPU clock has a range of 250 MHz to 950 MHz and memory can be adjusted from 900 MHz to 2200 MHz. GPU and memory voltages can be tweaked from 1.000V to 1.6000V and 1.300V to 1.800V respectively. We recommend only making minor adjustments and testing for stability after each change. Caution should be used when this amount of control is allowed.

iTracker Modes: Clock Speeds & Voltages
iTracker
Mode
GPU
Clock
Memory
Clock
GPU Voltage
Memory Voltage
Optimized 2D
500 MHz
950 MHz
1.273V
1550V
Optimized 3D
800 MHz
950 MHz
1.367V
1.550V
Gaming 2D
770 MHz
950 MHz
1.316V
1.550V
Gaming 3D
800 MHz
950 MHz
1.367V
1.550V
Default 2D
770 MHz
920 MHz
1.316V
1.520V
Default 3D
770 MHz
920 MHz
1.316V
1.520V
Power Saving 2D
500 MHz
500 MHz
1.273V
1.450V
Power Saving 3D
770 MHz
500 MHz
1.316V
1.450V

Incidentally, the Power Saving mode actually lowers the memory clock lower than iTracker allows if you do it manually. Also, undervolting the GPU below 1.230V and the memory below 1.440V caused artifacts to appear occasionally on the screen, even when we set the clocks to the lowest possible. For testing we used the Power Saving mode, but altered the 3D settings so they matched those of the Optimized and Gaming modes. During video playback the clock speeds locked to the default 770 / 920 MHz regardless of the profile used.

While the card has two fans, iTracker can only change how fast the smaller, auxiliary fan (the one over the VRM section of the board) spins. Unfortunately, the fan does not spin up below 40% speed, so the fan starts at a very high minimum speed of 3000 RPM. This means it can only be turned completely off or made to spin faster.


iTracker Information page.

iTracker is also an excellent for monitoring. It displays the video card's clock speeds, voltages, temperatures and fan speeds. It, along with power consumption measurements confirmed that both voltage controls were actually functioning and not just for show.



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