Radeon HD 7970 GHz Edition and Radeon HD 6990M Rebrand - video card comparison
Radeon HD 7970 GHz Edition
Radeon HD 6990M Rebrand
Architecture
GCN 1.0 (2012−2020)
TeraScale 2 (2009−2015)
GPU code name
Tahiti
Broadway
Market segment
Desktop
Desktop
Release date
June 2012
July 2011
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
1x 6-pin + 1x 8-pin
-
Boost clock speed
1050 MHz
-
Core clock speed
-
800 MHz
Floating-point performance
4,301 gflops
1,280.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
4,313 million
1,040 million
Pipelines / CUDA cores
2048
800
Power consumption (TDP)
250 Watt
100 Watt
Texture fill rate
134.4
32.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
1 GB
Memory bus width
384 Bit
128 Bit
Memory clock speed
1500 MHz
4400 MHz
Memory bandwidth
288 GB/s
70.4 GB/s
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
1
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
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
-
-