Radeon R6 M255DX and GeForce GT 420M - video card comparison
Passmark - benchmark score Radeon R6 M255DX vs GeForce GT 420M
Radeon R6 M255DX
623
GeForce GT 420M
417
Radeon R6 M255DX
GeForce GT 420M
Architecture
GCN (2011−2017)
Fermi (2010−2014)
GPU code name
Jet UL(T) DDR3
N11P-GE
Market segment
Laptop
Laptop
Release date
June 2014
September 2010
Interface
IGP
PCIe 2.0 x16
Boost clock speed
940 MHz
-
Core clock speed
855 / 514 MHz
500 MHz
CUDA cores
-
96
Floating-point performance
-
192 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
690 million
585 million
Pipelines / CUDA cores
576
96
Power consumption (TDP)
-
23 Watt
Texture fill rate
17.10
6.0 billion/sec
Memory type
DDR3
(G)DDR3
Maximum RAM amount
System Shared
1 GB
Memory bus width
System Shared
128 Bit
Memory clock speed
System Shared
800 MHz
Memory bandwidth
-
25.6 GB/s
Shared memory
+
-
Display Connectors
No outputs
No outputs
Eyefinity
+
-
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
N/A
AppAcceleration
+
-