GeForce GTX 980M and GeForce GTX 645 OEM - video card comparison
GeForce GTX 980M
GeForce GTX 645 OEM
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM204
GK106
Market segment
Laptop
Desktop
Release date
October 2014
April 2013
Bus support
PCI Express 3.0
-
Interface
MXM-B (3.0)
PCIe 3.0 x16
Supplementary power connectors
None
None
SLI options
+
-
Boost clock speed
1127 MHz
-
Core clock speed
1038 MHz
824 MHz
CUDA cores
1536
-
Floating-point performance
3,462 gflops
949.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,200 million
2,540 million
Pipelines / CUDA cores
1536
576
Power consumption (TDP)
unknown
65 Watt
Texture fill rate
51.84
39.55
Memory type
GDDR5
GDDR5
Maximum RAM amount
8 GB
1 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
2500 MHz
4000 MHz
Memory bandwidth
160 GB/s
64 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x DisplayPort
VGA аnalog display support
+
-
DisplayPort Multimode (DP++) support
+
-
HDMI
+
+
G-SYNC support
+
-
DirectX
12 (12_1)
12 (11_0)
CUDA
+
3.0
OpenCL
1.1
1.2
OpenGL
4.5
4.6
Shader Model
6.4
5.1
Vulkan
1.1.126
1.1.126
Ansel
+
-
BatteryBoost
+
-
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-
H.264, VC1, MPEG2 1080p video decoder
+
-
Optimus
+
-