ATI RADEON HD 4890 1024MB
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Card design
| HIS RADEON HD 4890 1024MB |
- GPU: RADEON HD 4890 (RV790)
- Interface: PCI-Express x16
- GPU frequencies (ROPs/Shaders): 850/850 MHz (nominal)
- Memory frequencies (physical (effective)): 975 (3900) MHz (nominal)
- Memory bus width: 256-bit
- Vertex processors: -
- Pixel processors: -
- Unified processors: 800
- Texture processors: 40 (BLF/TLF)
- ROPs: 16
- Dimensions: 260x100x33 mm (the last figure is the maximum thickness)
- PCB color: red
- RAMDACs/TDMS: integrated into GPU
- Output connectors: 2xDVI (2xDual-Link/HDMI), S-Video
- VIVO: not available
- TV-out: integrated into GPU
- Multi-GPU operation: Hardware CrossFire
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| Sapphire RADEON HD 4890 1024MB |
- GPU: RADEON HD 4890 (RV790)
- Interface: PCI-Express x16
- GPU frequencies (ROPs/Shaders): 850/850 MHz (nominal -- 850/850 MHz)
- Memory frequencies (physical (effective)): 975 (3900) MHz (nominal -- 975 (3900) MHz)
- Memory bus width: 256bit
- Vertex processors: -
- Pixel processors: -
- Unified processors: 800
- Texture processors: 40 (BLF/TLF)
- ROPs: 16
- Dimensions: 260x100x33 mm (the last figure is maximum thickness of the graphics card).
- PCB color: red
- RAMDACs/TDMS: integrated into GPU.
- Output connectors: 2xDVI (2xDual-Link/HDMI), S-Video.
- VIVO: not available
- TV-out: integrated into GPU.
- Multi-GPU operation: CrossFire (Hardware).
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| Powercolor RADEON HD 4890 1024MB |
- GPU: RADEON HD 4890 (RV790)
- Interface: PCI-Express x16
- GPU frequencies (ROPs/Shaders): 850/850 MHz (nominal -- 850/850 MHz)
- Memory frequencies (physical (effective)): 975 (3900) MHz (nominal -- 975 (3900) MHz)
- Memory bus width: 256bit
- Vertex processors: -
- Pixel processors: -
- Unified processors: 800
- Texture processors: 40 (BLF/TLF)
- ROPs: 16
- Dimensions: 260x100x33 mm (the last figure is maximum thickness of the graphics card).
- PCB color: red
- RAMDACs/TDMS: integrated into GPU.
- Output connectors: 2xDVI (2xDual-Link/HDMI), S-Video.
- VIVO: not available
- TV-out: integrated into GPU.
- Multi-GPU operation: CrossFire (Hardware).
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HIS RADEON HD 4890 1024MB
Sapphire RADEON HD 4890 1024MB
Powercolor RADEON HD 4890 1024MB |
Each graphics card has 1024 MB of GDDR5 SDRAM allocated in 8 Qimonda memory chips on the front side of the PCB. These memory chips are designed for the maximum frequency of 1000 (4000) MHz. |
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| Comparison with the reference design, front view |
| Powercolor RADEON HD 4890 1024MB |
Reference card ATI RADEON HD 4870 |
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| Sapphire RADEON HD 4890 1024MB |
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| HIS RADEON HD 4890 1024MB |
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| Comparison with the reference design, back view |
| Powercolor RADEON HD 4890 1024MB |
Reference card ATI RADEON HD 4870 |
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| Sapphire RADEON HD 4890 1024MB |
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| HIS RADEON HD 4890 1024MB |
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All three cards are apparently the same reference products manufactured at third-party plants. Partners just buy ready products from the company and add stickers, markings, bundles, packages and support (warranty, etc).
In its turn, the reference RV790 looks very much like the previous RADEON HD 4870. There are only minor differences in the power supply unit and improvements in memory circuitry, since the core has been modified. In fact, only the PCB layout has been optimized.
All cards have original TV-Out interfaces that require a special adapter to output video to a TV set via S-Video or RCA.
All cards require additional power, so each is bundled with a molex to 6-pin adapter, even though all modern PSUs have with such cables.
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)
The HDTV review is available here.
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