Radeon R9 M385X and GeForce GT 640M LE - video card comparison
Passmark - benchmark score Radeon R9 M385X vs GeForce GT 640M LE
Radeon R9 M385X
2053
GeForce GT 640M LE
720
Radeon R9 M385X
GeForce GT 640M LE
Architecture
GCN (2011−2017)
Fermi / Kepler (2012)
GPU code name
Strato-XT-M3
N13P-LP
Market segment
Laptop
Laptop
Release date
June 2015
March 2012
Bus support
PCIe 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Boost clock speed
1100 MHz
-
Core clock speed
1100 MHz
Up to 500 MHz
CUDA cores
-
Up to 384
Floating-point performance
1,971 gflops
384.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,080 million
585 million
Pipelines / CUDA cores
896
384
Power consumption (TDP)
-
20 Watt
Texture fill rate
61.60
Up to 16.0 billion/sec
Memory type
GDDR5
DDR3\DDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
128 Bit
128bit
Memory clock speed
1500 MHz
1800 - 4000 MHz
Memory bandwidth
76.8 GB/s
Up to 28.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
Eyefinity
1
-
HDMI
-
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
DirectX® 12
12 API
CUDA
-
+
Mantle
+
-
OpenCL
Not Listed
1.1
OpenGL
4.4
4.5
Shader Model
6.3
5.1
Vulkan
-
N/A
3D Blu-Ray
-
+
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
Optimus
-
+
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-