ATI Radeon HD 4870 Mac Edition: GPU Specs & Benchmarks
The Radeon HD 4870 Mac Edition is a graphics card by ATI, built on the 55 nm process and based on the RV770 graphics processor (GPU). The video card specifications and performance tests (benchmarks) are listed below.
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Graphics Processor (GPU)
- GPU Name
- RV770
- Model number
- RV770 XT Mac
(215-0669080) - Architecture
- TeraScale
- Foundry
- TSMC
- Process Size
- 55 nm
- Transistors
- 956 million
- Die Size
- 256 mm²
Graphics Card
- Release Date
- Jan 6th, 2009
- Family
- Radeon R700
(HD 4800) - Production
- End-of-life
- Predecessor
- Radeon R600
- Bus Interface
- PCIe 2.0 x16
Memory
- Memory Size
- 512 MB
- Memory Type
- GDDR5
- Memory Bus
- 256 bit
- Bandwidth
- 108.8 GB/s
Performance
- Pixel fillrate
- 12.00 GPixel/s
- Texture fillrate
- 30.00 GTexel/s
- FP32 (float) performance
- 1,200 GFLOPS
- FP64 (double) performance
- 240.0 GFLOPS (1:5)
Clock Speeds
- Memory Clock
- 850 MHz
3.4 Gbps effective - GPU Clock
- 750 MHz
Render Config
- Shading Units
- 800
- TMUs
- 40
- ROPs
- 16
- Compute Units
- 10
- L1 Cache
- 16 KB (per CU)
- L2 Cache
- 256 KB
Board Design
- Slot Width
- Dual-slot
- Length
- 250 mm
9.8 inches - Thermal design power (TDP)
- 150 W
- Suggested PSU
- 450 W
- Display Connectors
- 1x DVI
1x mini-DisplayPort - Power Connectors
- 2x 6-pin
- Board Number
- B771
API support
- DirectX
- 10.1 (10_1)
- OpenGL
- 3.3
- OpenCL
- 1.1
- Vulkan
- N/A
- Shader Model
- 4.1
