Radeon R9 390 and GeForce GTX 745 OEM - video card comparison
Radeon R9 390
GeForce GTX 745 OEM
Architecture
GCN 2.0 (2013−2017)
Maxwell (2014−2018)
GPU code name
Grenada
GM107
Market segment
Desktop
Desktop
Release date
June 2015
February 2014
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
None
Bridgeless CrossFire
1
-
Boost clock speed
1000 MHz
-
Core clock speed
-
1033 MHz
Floating-point performance
5,120 gflops
793.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
1,870 million
Pipelines / CUDA cores
2560
384
Power consumption (TDP)
275 Watt
55 Watt
Texture fill rate
160.0
24.79
Memory type
GDDR5
DDR3
Maximum RAM amount
0 MB
4 GB
Memory bus width
512 Bit
128 Bit
Memory clock speed
1000 MHz
1800 MHz
Memory bandwidth
384 GB/s
28.8 GB/s
High bandwidth memory (HBM)
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x VGA
Eyefinity
1
-
Number of Eyefinity displays
6
-
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
5.0
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.3
5.1
Vulkan
+
1.1.126
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-