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AMD Radeon HD 7770 GHz Edition Video Card Review
Author: Gabriel Torres 55,673 views
Type: Reviews Last Updated: February 14, 2012
Page: 3 of 14
The AMD Radeon HD 7770 GHz Edition (Cont’d)

The Radeon HD 7770 GHz Edition uses a standard aluminum cooler with a 80 mm fan.

AMD Radeon HD 7770
click to enlarge
Figure 4: Video card cooler

In Figure 5, you can see the video card with its cooler removed. It uses a voltage regulator with three phases for the GPU and one phase for the memory chips. The phases for the GPU uses ferrite-core coils, but the phase for the memory uses an iron-core coil. All capacitors used on this video card are solid.

AMD Radeon HD 7770
click to enlarge
Figure 5: AMD Radeon HD 7770 GHz Edition

The reviewed video card uses four Hynix H5GQ2H24MFR-T2C GDDR5 chips, each one storing 2 Gbit of data, making the 1 GB of memory available on this video card. Each chip is connected to the GPU through a 32-bit lane, creating the 128-bit datapath that is available. These chips can run up to 5 GHz. On this video card, they are accessed at 4.5 GHz, leaving an 11% margin for you to increase the memory clock still within specifications. Of course, you can always try to push the memory clock above its specs.

AMD Radeon HD 7770
click to enlarge
Figure 6: Memory chips

Before seeing the performance results, let’s recap the main features of this video card.

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