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ATI Radeon HD 4870 X2
- Graphics Processor
- R700 x2
- Cores
- 800 x2
- TMUs
- 40 x2
- ROPs
- 16 x2
- Memory Size
- 1024 MB x2
- Memory Type
- GDDR5
- Bus Width
- 256 bit x2
GPU
I/O
Back
PCB Front
PCB Back
Recommended Gaming Resolutions:
- 1280x720
- 1366x768
- 1600x900
The Radeon HD 4870 X2 was a high-end graphics card by ATI, launched on August 12th, 2008. Built on the 55 nm process, and based on the R700 graphics processor, in its R700 XT variant, the card supports DirectX 10.1. Since Radeon HD 4870 X2 does not support DirectX 11 or DirectX 12, it might not be able to run all the latest games. The R700 graphics processor is an average sized chip with a die area of 256 mm² and 956 million transistors. Radeon HD 4870 X2 combines two graphics processors to increase performance. It features 800 shading units, 40 texture mapping units, and 16 ROPs, per GPU. ATI has paired 2,048 MB GDDR5 memory with the Radeon HD 4870 X2, which are connected using a 256-bit memory interface per GPU (each GPU manages 1,024 MB). The GPU is operating at a frequency of 750 MHz, memory is running at 900 MHz (3.6 Gbps effective).
Being a dual-slot card, the ATI Radeon HD 4870 X2 draws power from 1x 6-pin + 1x 8-pin power connector, with power draw rated at 286 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 4870 X2 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card's dimensions are 267 mm x 111 mm x 38 mm, and it features a dual-slot cooling solution. Its price at launch was 550 US Dollars.
Being a dual-slot card, the ATI Radeon HD 4870 X2 draws power from 1x 6-pin + 1x 8-pin power connector, with power draw rated at 286 W maximum. Display outputs include: 2x DVI, 1x S-Video. Radeon HD 4870 X2 is connected to the rest of the system using a PCI-Express 2.0 x16 interface. The card's dimensions are 267 mm x 111 mm x 38 mm, and it features a dual-slot cooling solution. Its price at launch was 550 US Dollars.
Graphics Processor
Graphics Card
- Release Date
- Aug 12th, 2008
- Generation
-
Radeon R700
(HD 4800)
- Predecessor
- Radeon R600
- Successor
- Evergreen
- Production
- End-of-life
- Launch Price
- 550 USD
- Bus Interface
- PCIe 2.0 x16
- Reviews
- 79 in our database
Relative Performance
Based on TPU review data: "Performance Summary" at 1920x1080, 4K for RTX 3080 and faster.
Clock Speeds
- GPU Clock
- 750 MHz
- Memory Clock
-
900 MHz
3.6 Gbps effective
Memory
- Memory Size
- 1024 MB
- Memory Type
- GDDR5
- Memory Bus
- 256 bit
- Bandwidth
- 115.2 GB/s
Render Config
- Shading Units
- 800
- TMUs
- 40
- ROPs
- 16
- Compute Units
- 10
- L1 Cache
- 16 KB (per CU)
- L2 Cache
- 256 KB
Theoretical Performance
- Pixel Rate
- 12.00 GPixel/s
- Texture Rate
- 30.00 GTexel/s
- FP32 (float)
- 1,200.0 GFLOPS
- FP64 (double)
- 240.0 GFLOPS (1:5)
Board Design
- Slot Width
- Dual-slot
- Length
- 267 mm
10.5 inches
- Width
- 111 mm
4.4 inches
- Height
- 38 mm
1.5 inches
- TDP
- 286 W
- Suggested PSU
- 600 W
- Outputs
- 2x DVI
1x S-Video
- Power Connectors
- 1x 6-pin + 1x 8-pin
- Board Number
- 109-B50937-00
Graphics Features
- DirectX
- 10.1 (10_1)
- OpenGL
- 3.3
- OpenCL
- 1.1
- Vulkan
- N/A
- Shader Model
- 4.1
Card Notes
| This is a dual GPU card that features two RV770XT chips and a PCI-E lane arbiter chip made by PLX. The card features a total of 2 GB GDDR5 memory. |
R700 GPU Notes
| 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 |
Retail boards based on this design (7)
| Name | GPU Clock | Memory Clock | Other Changes |
|---|---|---|---|
| 790 MHz | 915 MHz | ||
| 750 MHz | 950 MHz | Triple-slot, 1x DVI 1x HDMI 1x DisplayPort 1x VGA | |
| 790 MHz | 950 MHz | Triple-slot, 1x DVI 1x HDMI 1x DisplayPort 1x VGA | |
| 750 MHz | 900 MHz | ||
| 750 MHz | 900 MHz | ||
| 750 MHz | 900 MHz | ||
| 800 MHz | 1000 MHz | Single-slot |
Jul 20th, 2025 13:23 EDT
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