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
Radeon HD 4870 Mac Edition
ATI Radeon HD 4870 Mac Edition: GPU Specs & Benchmarks