The new Radeon HD 7770 (a.k.a. “Cape Verde XT”) is a mainstream graphics chip based on the latest graphics architecture from AMD, dubbed “Graphics Core Next” or simply “GCN,” which supports the new PCI Express 3.0 connection and the latest DirectX version (11.1). Let’s see how the Super Overclocked Edition from XFX fared in our tests.

For a detailed explanation of the new features present on this latest architecture, please read our Radeon HD 7970 review.

XFX released four different video cards based on the Radeon HD 7770. In the table below, we compare the differences between them. All of them have 1 GB of GDDR5 memory with a 128-bit interface. The “Core Edition” and the “Double Dissipation Edition” use the stock clocks, while the other two models come overclocked.

Model Part Number Core Clock Memory Clock (Effective) Memory Transfer Rate Cooler Price
Core Edition FX-777A-ZNF4 1 GHz 4.5 GHz 72 GB/s One Fan USD 160
Double Dissipation FX-777A-ZDF4 1 GHz 4.5 GHz 72 GB/s Two Fans USD 170
Black Edition FX-777A-ZDB4 1,095 MHz 4.98 GHz 79.68 GB/s Two Fans USD 180
Super Overclocked FX-777A-ZDSC 1.12 GHz 5.2 GHz 83.2 GB/s Two Fans USD 185

In the table below, we compare the main specifications of the video cards included in our review. The prices listed below do not include rebates and are for the models with the clock and memory configurations listed below. Prices were researched at on the day we published this review, except for the Radeon HD 7770 and the XFX Radeon HD 7770 Super Overclocked, which are the prices advertised by AMD and XFX, respectively.

Video Card Core Clock Shader Clock Memory Clock (Effective) Memory Interface Memory Transfer Rate Memory Shaders DirectX Price
XFX Radeon HD 7770 Super Overclocked 1.12 GHz 1.12 GHz 5.2 GHz 128-bit 83.2 GB/s 1 GB GDDR5 640 11.1 USD 185
Radeon HD 7770 1 GHz 1 GHz 4.5 GHz 128-bit 72 GB/s 1 GB GDDR5 640 11.1 USD 150
Radeon HD 6850 775 MHz 775 MHz 4 GHz 256-bit 128 GB/s 1 GB GDDR5 960 11 USD 140 – 170
GeForce GTX 460 675 MHz 1,350 MHz 3.6 GHz 256-bit 115.2 GB/s 1 GB GDDR5 336 11 USD 140 – 150

You can compare the specs of these video cards with other video cards by taking a look at our “AMD ATI Chips Comparison Table” and “NVIDIA Chips Comparison Table” tutorials.

Today, only the LGA2011 Core i7 processors (“Sandy Bridge-E”) have a PCI Express 3.0 controller. In our Radeon HD 7970 review, we discovered that, at this time, there is no difference between using a PCI Express 2.0 or a PCI Express 3.0 connection. Since the reviewed video card is a mainstream product, we decided to use a different testing platform, based on a Core i5-2500K processor.

Now let’s take a complete look at the XFX Radeon HD 7770 Super Overclocked Edition.


Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.