GeForce GTX 980 and GeForce GT 640M - video card comparison
Passmark - benchmark score GeForce GTX 980 vs GeForce GT 640M
GeForce GTX 980
11458
GeForce GT 640M
946
GeForce GTX 980
GeForce GT 640M
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM204
N13P-GS
Market segment
Desktop
Laptop
Release date
September 2014
March 2012
Bus support
PCI Express 3.0
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Recommended system power (PSU)
500 Watt
-
Supplementary power connectors
2x 6-pins
-
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
4,981 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)
165 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
+
+