Radeon R9 390 and GeForce 840M - video card comparison
Passmark - benchmark score Radeon R9 390 vs GeForce 840M
Radeon R9 390
9182
GeForce 840M
1121
Radeon R9 390
GeForce 840M
Architecture
GCN 2.0 (2013−2017)
Maxwell (2014−2018)
GPU code name
Grenada
N15S-GT
Market segment
Desktop
Laptop
Release date
June 2015
March 2014
Bus support
PCIe 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
1 x 6-pin, 1 x 8-pin
-
Bridgeless CrossFire
1
-
Boost clock speed
1000 MHz
1124 MHz
Core clock speed
-
1029 MHz
Floating-point performance
5,120 gflops
863.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
6,200 million
-
Pipelines / CUDA cores
2560
384
Power consumption (TDP)
275 Watt
33 Watt
Texture fill rate
160.0
17.98
Memory type
GDDR5
DDR3
Maximum RAM amount
0 MB
4 GB
Memory bus width
512 Bit
64 Bit
Memory clock speed
1000 MHz
2000 MHz
Memory bandwidth
384 GB/s
16.02 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
+
-
DisplayPort support
+
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
+
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.6
4.5
Shader Model
6.3
5.1
Vulkan
+
1.1.126
AppAcceleration
-
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
GameWorks
-
+
GPU Boost
-
2.0
HD3D
-
-
Optimus
-
+
PowerTune
+
-
TrueAudio
+
-
VCE
+
-
ZeroCore
-
-