GeForce GT 640M LE and HD Graphics 4000 - video card comparison
Passmark - benchmark score GeForce GT 640M LE vs HD Graphics 4000
GeForce GT 640M LE
720
HD Graphics 4000
468
GeForce GT 640M LE
HD Graphics 4000
Architecture
Fermi / Kepler (2012)
Gen. 7 Ivy Bridge (2011−2012)
GPU code name
N13P-LP
Ivy Bridge
Market segment
Laptop
Laptop
Release date
March 2012
March 2011
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 2.0 x16
PCIe 1.0 x16
Boost clock speed
-
1350 MHz
Core clock speed
Up to 500 MHz
350 MHz
CUDA cores
Up to 384
-
Floating-point performance
384.0 gflops
33.6 gflops
Manufacturing process technology
28 nm
22 nm
Number of transistors
585 million
1,200 million
Pipelines / CUDA cores
384
16
Power consumption (TDP)
20 Watt
unknown
Texture fill rate
Up to 16.0 billion/sec
20.80
Memory type
DDR3\DDR5
System Shared
Maximum RAM amount
2 GB
System Shared
Memory bus width
128bit
64/128 Bit
Memory clock speed
1800 - 4000 MHz
System Shared
Memory bandwidth
Up to 28.8 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
11.1 (11_0)
CUDA
+
-
OpenCL
1.1
1.2
OpenGL
4.5
4.0
Shader Model
5.1
5.0
Vulkan
N/A
1.1.80
3D Blu-Ray
+
-
Optimus
+
-
Quick Sync
-
+