ATI Radeon HD 4770: ATI's First 40nm GPU

Graphics Cards
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Some of the card's inner workings can be revealed by taking a look at the BIOS. We used GPU-Z to extract the board's BIOS and Radeon BIOS Editor to examine its contents.

ATI HD 4870 1GB: BIOS Clock/voltage settings.

According to the BIOS, the card is set to 750/850 MHz and 1.263V during boot up and downclocks to 500/800 MHz when UVD is active. Displayed in green, yellow and red are the card's three clock/power modes during regular use. When idle and during video playback, our card downclocked to 500/800 MHz according to GPU-Z.

The BIOS' fan settings were not accessible.


These recordings were made with a high resolution, lab quality, digital recording system inside SPCR's own 11 dBA ambient anechoic chamber, then converted to LAME 128kbps encoded MP3s. We've listened long and hard to ensure there is no audible degradation from the original WAV files to these MP3s. They represent a quick snapshot of what we heard during the review.

These recordings are intended to give you an idea of how the product sounds in actual use — one meter is a reasonable typical distance between a computer or computer component and your ear. The recording contains stretches of ambient noise that you can use to judge the relative loudness of the subject. Be aware that very quiet subjects may not be audible — if we couldn't hear it from one meter, chances are we couldn't record it either!

The recording starts with 5~10 seconds of room ambiance, followed by 5~10 seconds of the VGA test system without a video card installed, and then the actual product's noise at various levels. For the most realistic results, set the volume so that the starting ambient level is just barely audible, then don't change the volume setting again.

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