Radeon R9 270X and GeForce 840M - video card comparison
Passmark - benchmark score Radeon R9 270X vs GeForce 840M
Radeon R9 270X
5036
GeForce 840M
1121
Radeon R9 270X
GeForce 840M
Architecture
GCN (2011−2017)
Maxwell (2014−2018)
GPU code name
Curacao XT
N15S-GT
Market segment
Desktop
Laptop
Release date
October 2013
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
2 x 6-pin
-
Boost clock speed
1050 MHz
1124 MHz
Core clock speed
-
1029 MHz
Floating-point performance
2,688 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)
180 Watt
33 Watt
Texture fill rate
84.00
17.98
Memory type
GDDR5
DDR3
Maximum RAM amount
4 GB
4 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
-
2000 MHz
Memory bandwidth
179.2 GB/s
16.02 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
-
DisplayPort support
+
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
+
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.6
4.5
Shader Model
5.1
5.1
Vulkan
+
1.1.126
AppAcceleration
+
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
GameWorks
-
+
GPU Boost
-
2.0
HD3D
+
-
LiquidVR
1
-
Optimus
-
+
PowerTune
-
-
TressFX
1
-
TrueAudio
+
-
UVD
+
-
ZeroCore
-
-