Radeon R9 M290X and GeForce 840M - video card comparison
Passmark - benchmark score Radeon R9 M290X vs GeForce 840M
Radeon R9 M290X
3360
GeForce 840M
1121
Radeon R9 M290X
GeForce 840M
Architecture
GCN (2011−2017)
Maxwell (2014−2018)
GPU code name
Neptune
N15S-GT
Market segment
Laptop
Laptop
Release date
January 2014
March 2014
Bus support
PCIe 3.0 x16
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
None
-
Boost clock speed
900 MHz
1124 MHz
Compute units
20
-
Core clock speed
850 MHz
1029 MHz
Floating-point performance
2,304 gflops
863.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,800 million
-
Pipelines / CUDA cores
1280
384
Power consumption (TDP)
100 Watt
33 Watt
Texture fill rate
72.00
17.98
Memory type
GDDR5
DDR3
Maximum RAM amount
4 GB
4 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
1200 MHz
2000 MHz
Memory bandwidth
153.6 GB/s
16.02 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
Eyefinity
1
-
DirectX
DirectX® 11
12 (11_0)
CUDA
-
+
Mantle
+
-
OpenCL
Not Listed
1.2
OpenGL
4.4
4.5
Shader Model
5.1
5.1
Vulkan
-
1.1.126
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
GameWorks
-
+
GPU Boost
-
2.0
HD3D
+
-
Optimus
-
+
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-