Radeon HD 7970 GHz Edition and Radeon RX 640 - video card comparison
Radeon HD 7970 GHz Edition
Radeon RX 640
Architecture
GCN 1.0 (2012−2020)
Polaris (2016−2019)
GPU code name
Tahiti
Polaris 12
Market segment
Desktop
Laptop
Release date
June 2012
August 2019
Bus support
PCIe 2.1 x16
-
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
1x 6-pin + 1x 8-pin
None
Boost clock speed
1050 MHz
1218 MHz
Core clock speed
-
1218 MHz
Floating-point performance
4,301 gflops
-
Manufacturing process technology
28 nm
14 nm
Number of transistors
4,313 million
2,200 million
Pipelines / CUDA cores
2048
640
Power consumption (TDP)
250 Watt
50 Watt
Texture fill rate
134.4
38.98
Memory type
GDDR5
GDDR5
Maximum RAM amount
3 GB
4 GB
Memory bus width
384 Bit
64 Bit
Memory clock speed
1500 MHz
6000 MHz
Memory bandwidth
288 GB/s
112.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
1
-
HDMI
+
+
DisplayPort support
-
-
DirectX
DirectX® 11
12 (12_0)
Mantle
-
-
OpenCL
1.2
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.4
Vulkan
-
1.2.131
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
+
HD3D
-
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-