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Lantic HD 4855 1 GB
- A4855D5-1GDVH-TOP
- Graphics Processor
- RV770
- Cores
- 640
- TMUs
- 32
- ROPs
- 16
- Memory Size
- 1024 MB
- Memory Type
- GDDR5
- Bus Width
- 256 bit
GPU
Graphics Processor
Graphics Card
- Release Date
- Jan 3rd, 2010
- Generation
-
Radeon R700
(HD 4800)
- Predecessor
- Radeon R600
- Successor
- Evergreen
- Production
- End-of-life
- Bus Interface
- PCIe 2.0 x16
Clock Speeds
- GPU Clock
575 MHz
625 MHz (+9%)
- Memory Clock
-
900 MHz
3.6 Gbps effective
Memory
- Memory Size
-
512 MB
1024 MB
- Memory Type
- GDDR5
- Memory Bus
- 256 bit
- Bandwidth
- 115.2 GB/s
Render Config
- Shading Units
- 640
- TMUs
- 32
- ROPs
- 16
- Compute Units
- 8
- L1 Cache
- 16 KB (per CU)
- L2 Cache
- 256 KB
Theoretical Performance
- Pixel Rate
-
9.200 GPixel/s
10.00 GPixel/s
- Texture Rate
-
18.40 GTexel/s
20.00 GTexel/s
- FP32 (float)
-
736.0 GFLOPS
800.0 GFLOPS
- FP64 (double)
-
147.2 GFLOPS
160.0 GFLOPS (1:5)
Board Design
- Slot Width
- Dual-slot
- TDP
- 110 W
- Suggested PSU
- 300 W
- Outputs
- 1x DVI
1x HDMI 1.3a
1x VGA
- Power Connectors
- 1x 6-pin
Graphics Features
- DirectX
- 10.1 (10_1)
- OpenGL
- 3.3
- OpenCL
- 1.1
- Vulkan
- N/A
- Shader Model
- 4.1
Card Notes
| Lantic Exclusive Rebranded HD 4830 with a HD 4870 PCB |
RV770 GPU Notes
| Mobile Variant: M98 Codename: Wekiva Graphics/Compute: GFX3 Display Core Engine: 3.1 Unified Video Decoder: 2.0 Latest Drivers: Windows XP / 8: Catalyst Software Suite 13.1 / 13.4 Beta Windows Vista / 7: Catalyst Software Suite 13.9 |
Other retail boards based on this design (2)
| Name | GPU Clock | Memory Clock | Other Changes |
|---|---|---|---|
| 575 MHz | 900 MHz | ||
|
Lantic HD 4855 1 GB
|
625 MHz | 900 MHz | 1024 MB |
Nov 24th, 2024 19:49 EST
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