Radeon HD 8790M and GeForce GT 640 - video card comparison
Passmark - benchmark score Radeon HD 8790M vs GeForce GT 640
Radeon HD 8790M
1344
GeForce GT 640
1209
Radeon HD 8790M
GeForce GT 640
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Mars XTX
GK107
Market segment
Laptop
Desktop
Release date
November 2012
June 2012
Interface
MXM-A (3.0)
PCIe 3.0 x16
Supplementary power connectors
None
None
Boost clock speed
900 MHz
-
Core clock speed
850 MHz
902 MHz
Floating-point performance
691.2 gflops
692.7 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
950 million
1,270 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
unknown
65 Watt
Texture fill rate
21.60
28.86
Memory type
GDDR5
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
4500 MHz
1782 MHz
Memory bandwidth
64 GB/s
28.51 GB/s
Shared memory
-
-
Display Connectors
No outputs
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