Radeon HD 7850 and Radeon HD 6790 - video card comparison
Passmark - benchmark score Radeon HD 7850 vs Radeon HD 6790
Radeon HD 7850
3976
Radeon HD 6790
1664
Radeon HD 7850
Radeon HD 6790
Architecture
GCN 1.0 (2012−2020)
Terascale 2 (2009−2015)
GPU code name
Pitcairn
Barts
Market segment
Desktop
Desktop
Release date
March 2012
April 2011
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin
2x 6-pin
Boost clock speed
1000 MHz
-
Core clock speed
-
840 MHz
Floating-point performance
1,761 gflops
1,344.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
2,800 million
1,700 million
Pipelines / CUDA cores
1024
800
Power consumption (TDP)
130 Watt
150 Watt
Texture fill rate
55.04
33.60
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
1200 MHz
1050 MHz
Memory bandwidth
153.6 GB/s
134.4 GB/s
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
1
-
HDMI
+
+
DisplayPort support
-
-
DirectX
12
11.2 (11_0)
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
+
N/A
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-