Radeon HD 7870 and GeForce GT 640M - video card comparison
Passmark - benchmark score Radeon HD 7870 vs GeForce GT 640M
Radeon HD 7870
4779
GeForce GT 640M
946
Radeon HD 7870
GeForce GT 640M
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Pitcairn XT
N13P-GS
Market segment
Desktop
Laptop
Release date
March 2012
March 2012
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 6-pin
-
Boost clock speed
-
645 MHz
Core clock speed
1000 MHz
Up to 625 MHz
CUDA cores
-
384
Floating-point performance
-
480.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
2800 Million
1,270 million
Pipelines / CUDA cores
1280
384
Power consumption (TDP)
175 Watt
32 Watt
Texture fill rate
80.00
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
128bit
Memory clock speed
4800 MHz
1800 - 4000 MHz
Memory bandwidth
153.6 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DirectX
12 (11_1)
12 API
CUDA
-
+
OpenCL
1.2
1.1
OpenGL
4.6
4.5
Shader Model
5.1
5.1
Vulkan
1.2.131
1.1.126
3D Blu-Ray
-
+
Optimus
-
+