GeForce 840M and Radeon HD 6750M Mac Edition - video card comparison
GeForce 840M
Radeon HD 6750M Mac Edition
Architecture
Maxwell (2014−2018)
TeraScale 2 (2009−2015)
GPU code name
N15S-GT
Whistler
Market segment
Laptop
Desktop
Release date
March 2014
April 2011
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x8
MXM-A (3.0)
Boost clock speed
1124 MHz
-
Core clock speed
1029 MHz
598 MHz
Floating-point performance
863.2 gflops
574.1 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
-
716 million
Pipelines / CUDA cores
384
480
Power consumption (TDP)
33 Watt
35 Watt
Texture fill rate
17.98
14.35
Memory type
DDR3
GDDR5
Maximum RAM amount
4 GB
512 MB
Memory bus width
64 Bit
128 Bit
Memory clock speed
2000 MHz
3176 MHz
Memory bandwidth
16.02 GB/s
50.82 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
11.2 (11_0)
CUDA
+
-
OpenCL
1.2
1.2
OpenGL
4.5
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
N/A
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-