AMD Radeon HD 6990 Launch Day: a 500W and $700 Dual-GPU Graphics Card for The Fanatic!

AMD Radeon HD 6990

Radeon HD 6990 Overview

Ecco fatto, AMD has launched the fastest graphics card on the market: the Radeon HD 6990. This power (processing power and above all power consumption) monster is made up of two Cayman GPUs (the GPU of the HD 6970) on a single PCB. AMD’s Radeon HD 6990 features dual-BIOS capabilities. This feature is controlled by the Unlocking Switch, which toggles between the factory-supported Performance BIOS of 375W (BIOS1), and an Extreme Performance BIOS (BIOS2) that can potentially unlock higher clock speeds and up to 450W of mind-blowing performance.

Radeon HD 6990 features:

  • GPU: Antilles (two Cayman) @ 830MHz/1120mV or 880MHz/1.175mV, 40nm
  • Shader processors: 3072 (2×1536), VLIW4 design
  • Memory: 4GB (2x2GB) GDDR5 @ 1250MHz real speed or 5000MHz effective, 2×256-bit
  • Texture units: 192 (2×96)
  • Z/Stencil ROPs: 2×64
  • Color ROPs: 2×32
  • VRM: 2×4-phase for the GPUs and 2 phases for the memory
  • Power connectors: two 8-pin
  • TDP: 375W or 450W (OC mode)
  • Idle power consumption: 37W
  • 3D APIs: OpenGL 4.1 and Direct3D 11
  • GPU computing: OpenCL 1.1, DirectCompute 11
  • Price: USD $700
    • AMD Radeon HD 6990, GPU-Z

      AMD Radeon HD 6990

      AMD Radeon HD 6990

      HD 6990 performances

      AMD Radeon HD 6990, global performance

      AMD Radeon HD 6990, 3DMark11
      3DMark11 – source

      HD 6990 power consumption and temperature

      AMD Radeon HD 6990 GPU temperature
      HD 6990 and FurMark 1.9.0source

      According to AnandTech tests, HD 6990 power consumption (card alone) with Crysis is aournd 335W while under FurMark, the power draw reaches 461W
      (I computed the power consumption with (P_load – P_idle) * 0.9). The max GPU temperature is 88°C under Crysis anf 94°C under FurMark.

      AMD Radeon HD 6990 GPU VRM
      Radeon HD 6990 GPU GPU VRM – source

      AMD Radeon HD 6990 PowerTune Throttling

      The HD 6990 has a dual-BIOS switch. And according to AnandTech, the nice news for overclockers is there is no PowerTune limit on position 1. Then you can reach 500W under FurMark.

      AMD Radeon HD 6990 dual bios switch settings

      Radeon HD 6990 Tests and Reviews

      You have the money and you want the best card…”

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4 thoughts on “AMD Radeon HD 6990 Launch Day: a 500W and $700 Dual-GPU Graphics Card for The Fanatic!”

  1. Leith

    I think that PCI Express 3 will need to increase the power draw limits!

    At this rate we will soon have PCs that need a 3 phase power supply!

  2. DrBalthar

    I am sorry to say but this card is a first fail on AMD side since the 2×00 and 3×00 series

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