GeForce GTX 980 Ti and GeForce GT 645M - video card comparison
Passmark - benchmark score GeForce GTX 980 Ti vs GeForce GT 645M
GeForce GTX 980 Ti
14228
GeForce GT 645M
957
GeForce GTX 980 Ti
GeForce GT 645M
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM200
N13P-GS
Market segment
Desktop
Laptop
Release date
June 2015
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)
600 Watt
-
Supplementary power connectors
6-pin + 8-pin
-
SLI options
+
-
Boost clock speed
1075 MHz
-
Core clock speed
1000 MHz
Up to 710 MHz
CUDA cores
2816
384
Floating-point performance
6,060 gflops
544.5 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
8,000 million
1,270 million
Pipelines / CUDA cores
2816
384
Power consumption (TDP)
250 Watt
32 Watt
Texture fill rate
176 billion/sec
22.7 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
6 GB
2 GB
Memory bus width
384 Bit
128bit
Memory clock speed
7.0 GB/s
1800 MHz
Memory bandwidth
336.5 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
-
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
-
+
GameStream
+
-
GameWorks
+
-
GeForce ShadowPlay
+
-
GPU Boost
2.0
-
Optimus
-
+