Radeon R9 390 and GeForce GT 640M - video card comparison
Passmark - benchmark score Radeon R9 390 vs GeForce GT 640M
Radeon R9 390
9182
GeForce GT 640M
943
Radeon R9 390
GeForce GT 640M
Architecture
GCN 2.0 (2013−2017)
Kepler (2012−2018)
GPU code name
Grenada
N13P-GS
Market segment
Desktop
Laptop
Release date
June 2015
March 2012
Bus support
PCIe 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
-
Bridgeless CrossFire
1
-
Boost clock speed
1000 MHz
645 MHz
Core clock speed
-
Up to 625 MHz
CUDA cores
-
384
Floating-point performance
5,120 gflops
480.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
1,270 million
Pipelines / CUDA cores
2560
384
Power consumption (TDP)
275 Watt
32 Watt
Texture fill rate
160.0
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
0 MB
2 GB
Memory bus width
512 Bit
128bit
Memory clock speed
1000 MHz
1800 - 4000 MHz
Memory bandwidth
384 GB/s
Up to 64.0 GB/s
High bandwidth memory (HBM)
-
-
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
Eyefinity
1
-
Number of Eyefinity displays
6
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DisplayPort support
+
-
DirectX
DirectX® 12
12 API
CUDA
-
+
Mantle
+
-
OpenCL
2.0
1.1
OpenGL
4.6
4.5
Shader Model
6.3
5.1
Vulkan
+
1.1.126
3D Blu-Ray
-
+
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
HD3D
-
-
Optimus
-
+
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-