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XFX Radeon HD 7770 1 GB Black Edition: Super Overclocked (FX-777A-ZDSC)

XFX has as many as five different Radeon HD 7770 models in their product lineup today, and XFX Radeon HD 7770 Black Edition: Super Overclocked is the fastest of them. Moreover, it is one of the two fastest Radeon HD 7770 based graphics cards with factory overclocking in the market (the second one is PowerColor PCS+ HD7770 GHz Edition: its GPU clock frequency is 30 MHz higher, but its effective memory frequency is 200 MHz lower).

The XFX graphics card boxes stand out among those of other products: they are very narrow and vertically oriented:


At the same time, they are just as informative and reliable as any other boxes. The graphics card’s accessories set is quite common, but contains everything you might need for proper use of this graphics card:

Besides, there is a cardboard door tag for a gamer’s room. The card is made in China and is priced at $149. As far as we know, this particular XFX graphics card comes with lifetime warranty.

The compact XFX Radeon HD 7770 Black Edition looks very stylish:


In the center of the silver-and-black casing there are “XFX” letters, with a fan on each side. The fan impellers have nice matt finish and the whole thing looks really cool.

In terms of connectivity, XFX Radeon HD 7770 Black Edition can’t boast anything special. It has one DVI-I (Dual-Link) out, one HDMI version 1.4a and two mini DisplayPort version 1.2 ports:

Just like the MSI card, the ventilation grid on the bracket has “XFX’ letters stenciled:

CrossFireX and power connectors are in their traditional spots:


The PCB is a copy of the reference Radeon HD card, only the textolite finish is matt:

Note that Radeon HD 7770 GHz Edition has a 3+1+1 voltage regulator circuitry, where three phases service the graphics processor, one phase – the memory and another one – the PLL. The GPU voltage is software controlled:

The small “Cape Verde XT” GPU die is only 123 mm2 big. The die on our specific graphics card was made on the first week of 2012:

XFX Radeon HD 7770 Black Edition: Super Overclocked is overclocked by 120 MHz and works at 1120 MHz in 3D mode. In 2D mode its frequency drops to 300 MHz.

Once again we see the same Hynix H5GQ2H24MFR T2C memory with theoretical effective frequency of 5000 MHz:

XFX engineers also overclocked the video memory to 5200 MHz, which is 400 MHz higher than the nominal clock for the reference Radeon HD 7770. I would like to remind you that these graphics cards have a 128 bit memory bus.

All specifications of the XFX graphics card are revealed in the following GPU-Z screenshot:

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