GeForce 840M and Radeon R7 (Bristol Ridge) - video card comparison
Passmark - benchmark score GeForce 840M vs Radeon R7 (Bristol Ridge)
GeForce 840M
1121
Radeon R7 (Bristol Ridge)
777
GeForce 840M
Radeon R7 (Bristol Ridge)
Architecture
Maxwell (2014−2018)
GCN 1.2 (2015−2016)
GPU code name
N15S-GT
Bristol Ridge
Market segment
Laptop
Laptop
Release date
March 2014
June 2016
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x8
-
Boost clock speed
1124 MHz
900 MHz
Core clock speed
1029 MHz
-
Floating-point performance
863.2 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
-
2410 Million
Pipelines / CUDA cores
384
512
Power consumption (TDP)
33 Watt
12-45 Watt
Texture fill rate
17.98
-
Memory type
DDR3
-
Maximum RAM amount
4 GB
-
Memory bus width
64 Bit
64/128 Bit
Memory clock speed
2000 MHz
-
Memory bandwidth
16.02 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
-
DirectX
12 (11_0)
12 (FL 12_0)
CUDA
+
-
OpenCL
1.2
-
OpenGL
4.5
-
Shader Model
5.1
-
Vulkan
1.1.126
-
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-