iXBT Labs - Computer Hardware in Detail






i3DSpeed, October 2008

ATI RADEON HD 3850 256MB DDR3 (670/1660 MHz)

Andrey Vorobiev; November 12, 2008.

On the example of the reference ATI RADEON HD 3850 256MB DDR3 (670/1660 MHz).


  • GPU: RADEON 3850 (RV670)
  • 256 MB GDDR3 SDRAM in 8 Samsung chips on the front side; 900 (1800) MHz peak clock rate
  • Interface: PCI-Express x16
  • GPU (ROPs/Shaders) clock rate: 670/670 MHz (nominal)
  • Memory clock rate, physical (effective): 830 (1660) MHz (nominal)
  • Bus width: 256-bit
  • Vertex processors: -
  • Pixel processors: -
  • Unified processors: 320
  • Texture processors: 16 (BLF/TLF)
  • ROPs: 16
  • Size: 220x100x15 mm (the latter is max. width)
  • PCB color: red
  • RAMDACs/TDMS: on the separate NVIO chip
  • Outputs: 2 x DVI (Dual-Link/HDMI), TV-out (integrated into GPU)
  • VIVO: -
  • Multi-GPU: Hardware CrossFire

This card features an audio codec that is output via a DVI-to-HDMI adapter.

This card features an original TV-Out interface, so an adapter is required to output video via S-Video or RCA. Such adapters are usually bundled.

This card requires a DVI-to-D-Sub adapter to be connected to an analog monitor with a D-Sub interface.

Maximum resolutions and frequencies:

  • 240 Hz maximum refresh rate
  • 2048 x 1536 x 32bit @ 85Hz Max - analog interface
  • 2560 x 1600 @ 60Hz Max - digital interface (all Dual-Link DVIs)

MPEG2 playback (DVD-Video) was analyzed back in 2002 and little has changed since that time. Modern graphics cards do not load CPUs during video playback by more than 25%.

The HDTV review is available here.

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