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i3DSpeed, August 2010

ATI RADEON HD 4850 1024MB DDR3 (625/625/2000 MHz)

Andrey Vorobiev; September 2, 2010.

On the example of Sapphire RADEON HD 4850 1024MB DDR3 (625/625/2000 MHz).

Price: Newegg, Amazon.

Features:

  • GPU: RADEON HD 4850 (RV770)
  • Memory: 1024MB GDDR3 SDRAM in 8 Hynix chips on the front side of the PCB; 1200 (2400) MHz peak clock rate
  • Interface: PCIe x16
  • GPU clock rate (ROPs/Shaders): 625/625 MHz (standard)
  • Memory clock rate, physical (effective): 990 (1980) MHz (the standard is 1000 (2000) MHz)
  • Bus width: 256-bit
  • Stream processors: 800
  • TMUs: 40 (BLF/TLF)
  • ROPs: 16
  • Size: 220x100x16 mm
  • PCB color: blue
  • RAMDACs/TDMS: integrated into GPU
  • Outputs: 2 x DVI (Dual-Link/HDMI), TV-out (integrated into GPU)
  • Multi-GPU: Hardware CrossFire


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

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.

We thank Sapphire for the provided graphics card.

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