i3DSpeed, February 2009
ATI RADEON HD 4870 X2 2x1024MB DDR5 (750/750/3600 MHz)
Andrey Vorobiev; March 9, 2009.
On the example of the reference ATI RADEON HD 4870 X2 2x1024MB DDR5 (750/750/3600 MHz).
- GPU: 2 x RADEON HD 4870 (RV770)
- 2 x 1024 MB GDDR5 SDRAM in 16 Qimonda chips on both sides; 1000 (4000) MHz peak clock rate
- Interface: PCI-Express x16
- GPU (ROPs/Shaders) clock rate: 2 x 750/750 MHz (nominal)
- Memory clock rate, physical (effective): 900 (3600) MHz (nominal)
- Bus width: 2 x 256-bit
- Vertex processors: -
- Pixel processors: -
- Unified processors: 2 x 800
- Texture processors: 2 x 40 (BLF/TLF)
- ROPs: 2 x 16
- Size: 275x100x33 mm (the latter is max. width)
- PCB color: black
- RAMDACs/TDMS: integrated into GPU
- 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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