Radeon HD 7850 and Radeon HD 7970M Crossfire - video card comparison
Radeon HD 7850
Radeon HD 7970M Crossfire
Architecture
GCN 1.0 (2012−2020)
GCN (2011−2017)
GPU code name
Pitcairn
Wimbledon XT
Market segment
Desktop
Laptop
Release date
March 2012
May 2012
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
-
Supplementary power connectors
1x 6-pin
-
Boost clock speed
1000 MHz
-
Core clock speed
-
850 MHz
Floating-point performance
1,761 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,800 million
-
Pipelines / CUDA cores
1024
2560
Power consumption (TDP)
130 Watt
200 Watt
Texture fill rate
55.04
-
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
-
Memory bus width
256 Bit
2x 256 Bit
Memory clock speed
1200 MHz
4800 MHz
Memory bandwidth
153.6 GB/s
-
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
-
Eyefinity
1
-
HDMI
+
-
DisplayPort support
-
-
DirectX
12
11.1
Mantle
-
-
OpenCL
1.2
-
OpenGL
4.6
-
Shader Model
5.1
-
Vulkan
+
-
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-