Radeon HD 6770 and GeForce GT 640M - video card comparison
Passmark - benchmark score Radeon HD 6770 vs GeForce GT 640M
Radeon HD 6770
1286
GeForce GT 640M
946
Radeon HD 6770
GeForce GT 640M
Architecture
TeraScale 2 (2009−2015)
Kepler (2012−2018)
GPU code name
Juniper
N13P-GS
Market segment
Desktop
Laptop
Release date
January 2011
March 2012
Bus support
PCIe 2.0 x16
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
-
Boost clock speed
900 MHz
645 MHz
Core clock speed
-
Up to 625 MHz
CUDA cores
-
384
Floating-point performance
1,360.0 gflops
480.0 gflops
Manufacturing process technology
40 nm
28 nm
Number of transistors
1,040 million
1,270 million
Pipelines / CUDA cores
800
384
Power consumption (TDP)
108 Watt
32 Watt
Texture fill rate
34.00
Up to 20.0 billion/sec
Memory type
GDDR5
DDR3\GDDR5
Maximum RAM amount
1 GB
2 GB
Memory bus width
128 Bit
128bit
Memory clock speed
1050 MHz
1800 - 4000 MHz
Memory bandwidth
76.8 GB/s
Up to 64.0 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
1
-
HDMI
+
+
HDCP
-
+
Maximum VGA resolution
-
Up to 2048x1536
DisplayPort support
-
-
DirectX
DirectX® 11
12 API
CUDA
-
+
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.4
4.5
Shader Model
5.0
5.1
Vulkan
-
1.1.126
3D Blu-Ray
-
+
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
HD3D
-
-
Optimus
-
+
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-