Radeon R9 M275 and GeForce GT 640M - video card comparison
Passmark - benchmark score Radeon R9 M275 vs GeForce GT 640M
Radeon R9 M275
1147
GeForce GT 640M
943
Radeon R9 M275
GeForce GT 640M
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Venus
N13P-GS
Market segment
Laptop
Laptop
Release date
August 2014
March 2012
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Boost clock speed
925 MHz
645 MHz
Core clock speed
925 MHz
Up to 625 MHz
CUDA cores
-
384
Floating-point performance
1,184 gflops
480.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,500 million
1,270 million
Pipelines / CUDA cores
640
384
Power consumption (TDP)
-
32 Watt
Texture fill rate
37.00
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
4500 MHz
1800 - 4000 MHz
Memory bandwidth
64 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
-
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
12 (11_1)
12 API
CUDA
-
+
OpenCL
1.2
1.1
OpenGL
4.6
4.5
Shader Model
5.1
5.1
Vulkan
1.2.131
1.1.126
3D Blu-Ray
-
+
Optimus
-
+