GeForce GT 645M and Radeon HD 7550M - video card comparison
Passmark - benchmark score GeForce GT 645M vs Radeon HD 7550M
GeForce GT 645M
957
Radeon HD 7550M
478
GeForce GT 645M
Radeon HD 7550M
Architecture
Kepler (2012−2018)
Terascale 2 (2009−2015)
GPU code name
N13P-GS
Thames-LP / Pro
Market segment
Laptop
Laptop
Release date
March 2012
January 2012
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Boost clock speed
-
550 MHz
Core clock speed
Up to 710 MHz
450 MHz
CUDA cores
384
-
Floating-point performance
544.5 gflops
480.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
716 million
Pipelines / CUDA cores
384
400
Power consumption (TDP)
32 Watt
14 Watt
Texture fill rate
22.7 billion/sec
12.00
Memory type
DDR3\GDDR5
GDDR5 / DDR3
Maximum RAM amount
2 GB
1 GB
Memory bus width
128bit
64 Bit
Memory clock speed
1800 MHz
3200 / 1800 MHz
Memory bandwidth
Up to 64.0 GB/s
28.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
11.2 (11_0)
CUDA
+
-
OpenCL
1.1
1.2
OpenGL
4.5
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
N/A
3D Blu-Ray
+
-
Optimus
+
-