GeForce GT 640M and Radeon HD 6450 - video card comparison
Passmark - benchmark score GeForce GT 640M vs Radeon HD 6450
GeForce GT 640M
946
Radeon HD 6450
203
GeForce GT 640M
Radeon HD 6450
Architecture
Kepler (2012−2018)
TeraScale 2 (2009−2015)
GPU code name
N13P-GS
Caicos
Market segment
Laptop
Desktop
Release date
March 2012
April 2011
Bus support
PCI Express 2.0, PCI Express 3.0
PCIe 2.0 x8
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
-
None
Boost clock speed
645 MHz
750 MHz
Core clock speed
Up to 625 MHz
-
CUDA cores
384
-
Floating-point performance
480.0 gflops
200.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
370 million
Pipelines / CUDA cores
384
160
Power consumption (TDP)
32 Watt
30 Watt
Texture fill rate
Up to 20.0 billion/sec
5.000
Memory type
DDR3\GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128bit
64 Bit
Memory clock speed
1800 - 4000 MHz
800 MHz
Memory bandwidth
-
8.5-12.8 GB/x (DDR3) or 25.6-28.8 GB/s (GDDR5)
Memory bandwidth
Up to 64.0 GB/s
25.6 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x VGA
Eyefinity
-
1
Number of Eyefinity displays
-
4
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DisplayPort support
-
+
DirectX
12 API
DirectX® 11
CUDA
+
-
Mantle
-
-
OpenCL
1.1
1.2
OpenGL
4.5
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
-
3D Blu-Ray
+
-
AppAcceleration
-
-
CrossFire
-
1
Enduro
-
-
HD3D
-
-
Optimus
+
-
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-