Radeon HD 5850 and GeForce GTX 645 OEM - video card comparison
Radeon HD 5850
GeForce GTX 645 OEM
Architecture
Terascale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
Cypress
GK106
Market segment
Desktop
Desktop
Release date
September 2009
April 2013
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
None
Core clock speed
725 MHz
824 MHz
Floating-point performance
2,088.0 gflops
949.2 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
2,154 million
2,540 million
Pipelines / CUDA cores
1440
576
Power consumption (TDP)
151 Watt
65 Watt
Texture fill rate
52.20
39.55
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
1 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
2000 MHz
4000 MHz
Memory bandwidth
128.0 GB/s
64 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
11.2 (11_0)
12 (11_0)
CUDA
-
3.0
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126