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i3DSpeed, August 2011

AMD Radeon HD 6990 2x2048 MB 2x256-bit DDR5 (830/830/5000 MHz)

Andrey Vorobiev; September 8, 2011.

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On the example of a reference AMD Radeon HD 6990 2x2048 MB 2x256-bit DDR5 (830/830/5000 MHz).

Features:

  • GPU: 2 x Radeon HD 6970 (Cayman)
  • Interface: PCIe 2.1 x16
  • GPU clock rate (ROPs/shaders): 830/880 MHz (standard)
  • Memory clock rate, physical (effective): 1250 (5000) MHz (standard)
  • Memory bus: 2 x 256-bit
  • Stream processors: 2 x 1536
  • Texture units: 2 x 96 (BLF/TLF/ANIS)
  • ROP units: 2 x 32
  • Dimensions: 330x100x33 mm
  • Board color: black
  • Display connectors: Dual-Link DVI, 4 x Mini DisplayPort 1.2
  • Multi-GPU mode: hardware CrossFireX


This card has two BIOS chips and a selector switch. One BIOS offers a regular mode, the other stores an overclocked profile. This should also help fix unsuccessful firmware upgrades. BIOS1 is selected by default.

This card has two 8-pin supplementary power connectors.

Each new DisplayPort 1.2 interface allows outputting signal to three monitors by means of a special hub (twelve monitors in total).

Maximum resolutions and frequencies:

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

We thank AMD for the provided graphics card.

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