Radeon R9 390 X2 and Radeon 780M - video card comparison
Radeon R9 390 X2
Radeon 780M
Architecture
GCN 2.0 (2013−2017)
RDNA 3
GPU code name
Grenada
Phoenix
Market segment
Desktop
Laptop
Release date
September 2015
January 2023
Interface
PCIe 3.0 x16
PCIe 4.0 x8
Supplementary power connectors
4x 8-pin
None
Boost clock speed
-
3000 MHz
Core clock speed
1000 MHz
1500 MHz
Floating-point performance
2x 5,120 gflops
-
Manufacturing process technology
28 nm
4 nm
Number of transistors
6,200 million
25,390 million
Pipelines / CUDA cores
2560
768
Power consumption (TDP)
580 Watt
54 Watt (35 - 54 Watt TGP)
Texture fill rate
160.0
139.2
Memory type
GDDR5
System Shared
Maximum RAM amount
8 GB
System Shared
Memory bus width
512 Bit
System Shared
Memory clock speed
5400 MHz
System Shared
Memory bandwidth
345.6 GB/s
-
Shared memory
-
+
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
Portable Device Dependent
HDMI
+
-
DirectX
12 (12_0)
12 Ultimate (12_2)
OpenCL
2.0
2.1
OpenGL
4.6
4.6
Shader Model
6.3
6.7
Vulkan
1.2.131
1.3