Radeon HD 7990 and Radeon HD 6850 - video card comparison
Passmark - benchmark score Radeon HD 7990 vs Radeon HD 6850
Radeon HD 7990
5732
Radeon HD 6850
2030
Radeon HD 7990
Radeon HD 6850
Architecture
GCN 1.0 (2012−2020)
TeraScale 2 (2009−2015)
GPU code name
Malta
Barts
Market segment
Desktop
Desktop
Release date
April 2013
October 2010
Bus support
-
AGP
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 8-pin
1x 6-pin
Boost clock speed
1000 MHz
-
Core clock speed
950 MHz
-
Floating-point performance
2x 4,096 gflops
1,488.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
4,313 million
1,700 million
Pipelines / CUDA cores
2048
960
Power consumption (TDP)
375 Watt
127 Watt
Texture fill rate
128.0
37.20
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
1 GB
Memory bus width
384 Bit
256 Bit
Memory clock speed
6000 MHz
-
Memory bandwidth
288.0 GB/s
128.0 GB/s
Display Connectors
1x DVI, 4x mini-DisplayPort
2x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
-
1
HDMI
-
+
DisplayPort support
-
-
DirectX
12 (11_1)
DirectX® 11
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
1.2.131
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-