Radeon HD 4890 and Radeon HD 6790 - video card comparison
Passmark - benchmark score Radeon HD 4890 vs Radeon HD 6790
Radeon HD 4890
1552
Radeon HD 6790
1664
Radeon HD 4890
Radeon HD 6790
Architecture
TeraScale (2005−2013)
Terascale 2 (2009−2015)
GPU code name
RV790
Barts
Market segment
Desktop
Desktop
Release date
April 2009
April 2011
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
2x 6-pin
Core clock speed
850 MHz
840 MHz
Floating-point performance
1,360.0 gflops
1,344.0 gflops
Manufacturing process technology
55 nm
40 nm
Number of transistors
959 million
1,700 million
Pipelines / CUDA cores
800
800
Power consumption (TDP)
190 Watt
150 Watt
Texture fill rate
34.00
33.60
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
1 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
3900 MHz
1050 MHz
Memory bandwidth
124.8 GB/s
134.4 GB/s
Display Connectors
2x DVI, 1x S-Video
2x DVI, 1x HDMI, 1x DisplayPort
HDMI
-
+
DirectX
10.1 (10_1)
11.2 (11_0)
OpenCL
1.1
1.2
OpenGL
3.3
4.4
Shader Model
4.1
5.0
Vulkan
N/A
N/A