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On the example of PowerColor Radeon HD 7770 1024MB 128-bit DDR5 (1000/1000/4500 MHz).

Features:

• GPU: Radeon HD 7770 (Cape Verde XT)
• Interface: PCIe 3.0 x16
• GPU clock rate (ROPs/shaders): 1000/1000 MHz (standard)
• Memory clock rate, physical (effective): 1125 (4500) MHz (standard)
• Memory bus: 128-bit
• Stream processors: 640
• Texture units: 40 (BLF/TLF/ANIS)
• ROP units: 16
• Dimensions: 210x114x38 mm
• Board color: red
• Display connectors: Dual-Link DVI-I, HDMI, 2 x Mini DisplayPort
• Multi-GPU mode: hardware CrossFireX

This card features its own audio codec, so nothing else is required to output audio to HDMI.

This card has one 6-pin supplementary power connector.

This card can work with three monitors simultaneously.

There's also a very interesting feature called "ZeroCore Power," which is basically card's ability to hybernate when monitor turns off after a period of inactivity. Usually, a graphics card remains in the same 2D mode, at same clock rates. With ZeroCore Power, any Radeon HD 7000 considerably reduces clock rates, consuming just 3W, then stops the fan. Moreover, in a CrossFire configuration, as soon as cards go out of the 3D mode, only the first card continues to work while the remaining ones go into the aforementioned hybernation. A very nice feature we'd say!

Maximum resolutions and frequencies:

• 240 Hz maximum refresh rate
• 2560 x 1600 @ 60Hz max. digital resolution
• 2048 x 1536 @ 85Hz max. VGA resolution

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