Radeon HD 7950 and Radeon HD 8490 OEM - video card comparison
Radeon HD 7950
Radeon HD 8490 OEM
Architecture
GCN 1.0 (2012−2020)
TeraScale 2 (2009−2015)
GPU code name
Tahiti
Caicos
Market segment
Desktop
Desktop
Release date
January 2012
July 2013
Bus support
PCIe 3.0 x16
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
None
Boost clock speed
1250 MHz
-
Compute units
28
-
Core clock speed
-
875 MHz
Floating-point performance
2,867 gflops
280.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
4,313 million
370 million
Pipelines / CUDA cores
1792
160
Power consumption (TDP)
200 Watt
35 Watt
Texture fill rate
89.60
7.000
Memory type
GDDR5
DDR3
Maximum RAM amount
3 GB
1 GB
Memory bus width
384 Bit
64 Bit
Memory clock speed
1250 MHz
1800 MHz
Memory bandwidth
240 GB/s
14.4 GB/s
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
1x DVI, 1x DisplayPort
Eyefinity
1
-
Number of Eyefinity displays
6
-
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
+
-