Radeon HD 7850 and Radeon HD 7970 - video card comparison
Passmark - benchmark score Radeon HD 7850 vs Radeon HD 7970
Radeon HD 7850
3976
Radeon HD 7970
5405
Radeon HD 7850
Radeon HD 7970
Architecture
GCN 1.0 (2012−2020)
GCN (2011−2017)
GPU code name
Pitcairn
Tahiti XT
Market segment
Desktop
Desktop
Release date
March 2012
December 2011
Bus support
PCIe 2.1 x16
PCIe 2.1 x16
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
1x 6-pin + 1x 8-pin
Boost clock speed
1000 MHz
925 MHz
Floating-point performance
1,761 gflops
3,789 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,800 million
4,313 million
Pipelines / CUDA cores
1024
2048
Power consumption (TDP)
130 Watt
300 Watt
Texture fill rate
55.04
118.4
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
6 GB
Memory bus width
256 Bit
384 Bit
Memory clock speed
1200 MHz
1375 MHz
Memory bandwidth
153.6 GB/s
264 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
1
+
HDMI
+
+
DisplayPort support
-
-
DirectX
12
DirectX® 11
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
+
-
AppAcceleration
-
-
CrossFire
1
1
Enduro
-
-
FreeSync
1
1
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-