Radeon HD 7970 and Radeon HD 2900 XT - video card comparison
Passmark - benchmark score Radeon HD 7970 vs Radeon HD 2900 XT
Radeon HD 7970
5405
Radeon HD 2900 XT
679
Radeon HD 7970
Radeon HD 2900 XT
Architecture
GCN (2011−2017)
TeraScale (2005−2013)
GPU code name
Tahiti XT
R600
Market segment
Desktop
Desktop
Release date
December 2011
May 2007
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 1.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
1x 6-pin + 1x 8-pin
Boost clock speed
925 MHz
-
Core clock speed
-
743 MHz
Floating-point performance
3,789 gflops
475.5 gflops
Manufacturing process technology
28 nm
80 nm
Number of transistors
4,313 million
720 million
Pipelines / CUDA cores
2048
320
Power consumption (TDP)
300 Watt
215 Watt
Texture fill rate
118.4
11.89
Memory type
GDDR5
GDDR3
Maximum RAM amount
6 GB
512 MB
Memory bus width
384 Bit
512 Bit
Memory clock speed
1375 MHz
1656 MHz
Memory bandwidth
264 GB/s
106.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
2x DVI, 1x S-Video
Eyefinity
+
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
10.0 (10_0)
Mantle
-
-
OpenCL
1.2
N/A
OpenGL
4.6
3.3
Shader Model
5.1
4.0
Vulkan
-
N/A
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-