GeForce 840M and Mobility Radeon HD 2600 - video card comparison
GeForce 840M
Mobility Radeon HD 2600
Architecture
Maxwell (2014−2018)
RV6xx (2007−2010)
GPU code name
N15S-GT
M76
Market segment
Laptop
Laptop
Release date
March 2014
May 2007
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x8
MXM-II
Boost clock speed
1124 MHz
-
Core clock speed
1029 MHz
500 MHz
Floating-point performance
863.2 gflops
120 gflops
Manufacturing process technology
28 nm
65 nm
Number of transistors
-
390 million
Pipelines / CUDA cores
384
120
Power consumption (TDP)
33 Watt
-
Texture fill rate
17.98
4.000
Memory type
DDR3
DDR2, GDDR3
Maximum RAM amount
4 GB
256+ MB
Memory bus width
64 Bit
128 Bit
Memory clock speed
2000 MHz
600 MHz
Memory bandwidth
16.02 GB/s
12.8 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
10.0 (10_0)
CUDA
+
-
OpenCL
1.2
N/A
OpenGL
4.5
3.3
Shader Model
5.1
4.0
Vulkan
1.1.126
N/A
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-