GeForce GT 755M and GeForce GT 640M - video card comparison
Passmark - benchmark score GeForce GT 755M vs GeForce GT 640M
GeForce GT 755M
1739
GeForce GT 640M
943
GeForce GT 755M
GeForce GT 640M
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
N14P-
N13P-GS
Market segment
Laptop
Laptop
Release date
June 2013
March 2012
Bus support
PCI Express 3.0, PCI Express 2.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
SLI-ready
-
-
Boost clock speed
-
645 MHz
Core clock speed
980 MHz
Up to 625 MHz
CUDA cores
-
384
Floating-point performance
752.6 gflops
480.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
1,270 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
50 Watt
32 Watt
Texture fill rate
31.36
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
128 Bit
128bit
Memory clock speed
5400 MHz
1800 - 4000 MHz
Memory bandwidth
86.4 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Standard memory configuration
GDDR5
-
Display Connectors
No outputs
No outputs
eDP 1.2 signal support
Up to 3840x2160
-
LVDS signal support
Up to 1920x1200
-
VGA аnalog display support
Up to 2048x1536
-
DisplayPort Multimode (DP++) support
Up to 3840x2160
-
HDCP content protection
+
-
HDMI
+
+
7.1 channel HD audio on HDMI
+
-
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
12 API
12 API
CUDA
+
+
OpenCL
1.1
1.1
OpenGL
4.5
4.5
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126
3D Blu-Ray
-
+
3D Vision / 3DTV Play
+
-
Blu-Ray 3D Support
+
-
H.264, VC1, MPEG2 1080p video decoder
+
-
Optimus
+
+
TrueHD and DTS-HD audio bitstreaming
+
-