GeForce GTX 980 Mobile and GeForce GT 640M - video card comparison
GeForce GTX 980 Mobile
GeForce GT 640M
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
N16E-GXX
N13P-GS
Market segment
Laptop
Laptop
Release date
September 2014
March 2012
Bus support
PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
MXM-B (3.0)
PCIe 3.0 x16
SLI options
+
-
Boost clock speed
1216 MHz
645 MHz
Core clock speed
1064 MHz
Up to 625 MHz
CUDA cores
2048
384
Floating-point performance
4,358 gflops
480.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,200 million
1,270 million
Pipelines / CUDA cores
2048
384
Power consumption (TDP)
100-200 Watt
32 Watt
Texture fill rate
144 billion/sec
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
7.0 GB/s
1800 - 4000 MHz
Memory bandwidth
224 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
Dual Link DVI-I, HDMI 2.0, 3x DisplayPort 1.2
No outputs
Multi monitor support
4 displays
-
VGA аnalog display support
+
-
DisplayPort Multimode (DP++) support
+
-
HDMI
+
+
HDCP
+
+
Maximum VGA resolution
2048x1536
Up to 2048x1536
G-SYNC support
+
-
Audio input for HDMI
Internal
-
DirectX
12 (12_1)
12 API
CUDA
+
+
OpenCL
1.2
1.1
OpenGL
4.5
4.5
Shader Model
6.4
5.1
Vulkan
1.1.126
1.1.126
3D Blu-Ray
-
+
BatteryBoost
+
-
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-
H.264, VC1, MPEG2 1080p video decoder
+
-
Optimus
+
+