AMD Radeon RX 640 Mobile vs AMD Radeon HD 8970 OEM
GPU Specs Compare
Graphics Card
Release Date
May 2019
Jan 2013
Generation
Mobility Radeon
Sea Islands
Type
Mobile
Desktop
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x16
Clock Speeds
Base Clock
1082 MHz
-
Boost Clock
1218 MHz
-
Memory Clock
1500 MHz
1375 MHz
Memory
Memory Size
2GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
64bit
384bit
Bandwidth
48.00GB/s
264.0GB/s
Render Config
Compute Units
10
32
Shading Units
640
2048
TMUs
40
128
ROPs
16
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
768 KB
Theoretical Performance
Pixel Rate
19.49 GPixel/s
29.60 GPixel/s
Texture Rate
48.72 GTexel/s
118.4 GTexel/s
FP16 (half)
1.559 TFLOPS
-
FP32 (float)
1.559 TFLOPS
3.789 TFLOPS
FP64 (double)
97.44 GFLOPS
947.2 GFLOPS
Graphics Processor
GPU Name
Polaris 23
Tahiti
GPU Variant
Polaris 23 XT
Tahiti XT(215-0821060)
Architecture
GCN 4.0
GCN 1.0
Foundry
GlobalFoundries
TSMC
Process Size
14 nm
28 nm
Transistors
2.2 billion
4.313 billion
Die Size
103 mm²
352 mm²
Board Design
TDP
50W
250W
Outputs
No outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
None
1x 6-pin + 1x 8-pin
Suggested PSU
-
600 W
Graphics Features
DirectX
12 (12_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.1
1.2
Vulkan
1.2
1.2
Shader Model
6.4
5.1