GeForce GTX 980M and GeForce GT 640M - video card comparison
Passmark - benchmark score GeForce GTX 980M vs GeForce GT 640M
GeForce GTX 980M
7565
GeForce GT 640M
943
GeForce GTX 980M
GeForce GT 640M
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM204
N13P-GS
Market segment
Laptop
Laptop
Release date
October 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
Supplementary power connectors
None
-
SLI options
+
-
Boost clock speed
1127 MHz
645 MHz
Core clock speed
1038 MHz
Up to 625 MHz
CUDA cores
1536
384
Floating-point performance
3,462 gflops
480.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,200 million
1,270 million
Pipelines / CUDA cores
1536
384
Power consumption (TDP)
unknown
32 Watt
Texture fill rate
51.84
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
8 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
2500 MHz
1800 - 4000 MHz
Memory bandwidth
160 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
VGA аnalog display support
+
-
DisplayPort Multimode (DP++) support
+
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
G-SYNC support
+
-
DirectX
12 (12_1)
12 API
CUDA
+
+
OpenCL
1.1
1.1
OpenGL
4.5
4.5
Shader Model
6.4
5.1
Vulkan
1.1.126
1.1.126
3D Blu-Ray
-
+
Ansel
+
-
BatteryBoost
+
-
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-
H.264, VC1, MPEG2 1080p video decoder
+
-
Optimus
+
+