Radeon R9 390 X2 and Radeon HD 4750 - video card comparison
Radeon R9 390 X2
Radeon HD 4750
Architecture
GCN 2.0 (2013−2017)
TeraScale (2005−2013)
GPU code name
Grenada
RV740
Market segment
Desktop
Desktop
Release date
September 2015
September 2009
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
4x 8-pin
1x 6-pin
Core clock speed
1000 MHz
730 MHz
Floating-point performance
2x 5,120 gflops
934.4 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
6,200 million
826 million
Pipelines / CUDA cores
2560
640
Power consumption (TDP)
580 Watt
100 Watt
Texture fill rate
160.0
23.36
Memory type
GDDR5
GDDR5
Maximum RAM amount
8 GB
512 MB
Memory bus width
512 Bit
128 Bit
Memory clock speed
5400 MHz
3200 MHz
Memory bandwidth
345.6 GB/s
51.2 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x S-Video
HDMI
+
-
DirectX
12 (12_0)
10.1 (10_1)
OpenCL
2.0
1.1
OpenGL
4.6
3.3
Shader Model
6.3
4.1
Vulkan
1.2.131
N/A