GeForce GTX 645 OEM and Radeon Sky 700 - video card comparison
GeForce GTX 645 OEM
Radeon Sky 700
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
GK106
Tahiti
Market segment
Desktop
Desktop
Release date
April 2013
March 2013
Bus support
-
PCIe 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
1x 8-pin
Core clock speed
824 MHz
900 MHz
Floating-point performance
949.2 gflops
3,226 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2,540 million
4,313 million
Pipelines / CUDA cores
576
1792
Power consumption (TDP)
65 Watt
225 Watt
Texture fill rate
39.55
100.8
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
6 GB
Memory bus width
128 Bit
384 Bit
Memory clock speed
4000 MHz
5500 MHz
Memory bandwidth
64 GB/s
176 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DisplayPort
DisplayPort count
-
1
Dual-link DVI support
-
1
HDMI
+
-
DirectX
12 (11_0)
12 (11_1)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2.131