Radeon HD 4890 and Radeon HD 4870 Mac Edition - video card comparison
Radeon HD 4890
Radeon HD 4870 Mac Edition
Architecture
TeraScale (2005−2013)
TeraScale (2005−2013)
GPU code name
RV790
RV770
Market segment
Desktop
Desktop
Release date
April 2009
January 2009
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
2x 6-pin
Core clock speed
850 MHz
750 MHz
Floating-point performance
1,360.0 gflops
1,200.0 gflops
Manufacturing process technology
55 nm
55 nm
Number of transistors
959 million
956 million
Pipelines / CUDA cores
800
800
Power consumption (TDP)
190 Watt
150 Watt
Texture fill rate
34.00
30.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
512 MB
Memory bus width
256 Bit
256 Bit
Memory clock speed
3900 MHz
3400 MHz
Memory bandwidth
124.8 GB/s
108.8 GB/s
Display Connectors
2x DVI, 1x S-Video
1x DVI, 1x mini-DisplayPort
DirectX
10.1 (10_1)
10.1 (10_1)
OpenCL
1.1
1.1
OpenGL
3.3
3.3
Shader Model
4.1
4.1
Vulkan
N/A
N/A