GeForce 840M and Radeon HD 6450 - video card comparison
Passmark - benchmark score GeForce 840M vs Radeon HD 6450
GeForce 840M
1121
Radeon HD 6450
203
GeForce 840M
Radeon HD 6450
Architecture
Maxwell (2014−2018)
TeraScale 2 (2009−2015)
GPU code name
N15S-GT
Caicos
Market segment
Laptop
Desktop
Release date
March 2014
April 2011
Bus support
PCI Express 2.0, PCI Express 3.0
PCIe 2.0 x8
Interface
PCIe 3.0 x8
PCIe 2.0 x16
Supplementary power connectors
-
None
Boost clock speed
1124 MHz
750 MHz
Core clock speed
1029 MHz
-
Floating-point performance
863.2 gflops
200.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
-
370 million
Pipelines / CUDA cores
384
160
Power consumption (TDP)
33 Watt
30 Watt
Texture fill rate
17.98
5.000
Memory type
DDR3
GDDR5
Maximum RAM amount
4 GB
1 GB
Memory bus width
64 Bit
64 Bit
Memory clock speed
2000 MHz
800 MHz
Memory bandwidth
16.02 GB/s
25.6 GB/s
Memory bandwidth
-
8.5-12.8 GB/x (DDR3) or 25.6-28.8 GB/s (GDDR5)
Shared memory
-
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x VGA
Eyefinity
-
1
Number of Eyefinity displays
-
4
HDMI
-
+
DisplayPort support
-
+
DirectX
12 (11_0)
DirectX® 11
CUDA
+
-
Mantle
-
-
OpenCL
1.2
1.2
OpenGL
4.5
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
GameWorks
+
-
GPU Boost
2.0
-
HD3D
-
-
Optimus
+
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-