Radeon HD 7870 XT and GeForce GT 640 - video card comparison
Passmark - benchmark score Radeon HD 7870 XT vs GeForce GT 640
Radeon HD 7870 XT
4603
GeForce GT 640
1209
Radeon HD 7870 XT
GeForce GT 640
Architecture
GCN 1.0 (2012−2020)
Kepler (2012−2018)
GPU code name
Tahiti
GK107
Market segment
Desktop
Desktop
Release date
November 2012
June 2012
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
None
Boost clock speed
975 MHz
-
Core clock speed
925 MHz
902 MHz
Floating-point performance
2,995 gflops
692.7 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
1,270 million
Pipelines / CUDA cores
1536
384
Power consumption (TDP)
185 Watt
65 Watt
Texture fill rate
93.60
28.86
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
6000 MHz
1782 MHz
Memory bandwidth
192.0 GB/s
28.51 GB/s
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (11_1)
12 (11_0)
CUDA
-
3.0
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.2.131
1.1.126