Radeon HD 6790 and Radeon HD 4850 - video card comparison
Passmark - benchmark score Radeon HD 6790 vs Radeon HD 4850
Radeon HD 6790
1664
Radeon HD 4850
1057
Radeon HD 6790
Radeon HD 4850
Architecture
Terascale 2 (2009−2015)
Terascale 1 (2008−2010)
GPU code name
Barts
RV770
Market segment
Desktop
Desktop
Release date
April 2011
June 2008
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
1x 6-pin
Core clock speed
840 MHz
625 MHz
Floating-point performance
1,344.0 gflops
1,000.0 gflops
Manufacturing process technology
40 nm
55 nm
Number of transistors
1,700 million
956 million
Pipelines / CUDA cores
800
800
Power consumption (TDP)
150 Watt
110 Watt
Texture fill rate
33.60
25.00
Memory type
GDDR5
GDDR3
Maximum RAM amount
1 GB
512 MB
Memory bus width
256 Bit
256 Bit
Memory clock speed
1050 MHz
993 MHz
Memory bandwidth
134.4 GB/s
63.55 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x S-Video
HDMI
+
-
DirectX
11.2 (11_0)
10.1 (10_1)
OpenCL
1.2
1.1
OpenGL
4.4
3.3
Shader Model
5.0
4.1
Vulkan
N/A
N/A