GeForce GTX 285M and GeForce 840M - video card comparison
Passmark - benchmark score GeForce GTX 285M vs GeForce 840M
GeForce GTX 285M
655
GeForce 840M
1121
GeForce GTX 285M
GeForce 840M
Architecture
G9x (2007−2010)
Maxwell (2014−2018)
GPU code name
N10E-GTX1
N15S-GT
Market segment
Laptop
Laptop
Release date
March 2009
March 2014
Bus support
PCI-E 2.0
PCI Express 2.0, PCI Express 3.0
Interface
MXM-B (3.0)
PCIe 3.0 x8
SLI options
2-way
-
MXM Type
MXM 3.0 Type-B
-
Boost clock speed
-
1124 MHz
Core clock speed
576 MHz
1029 MHz
CUDA cores
128
-
Floating-point performance
384.0 gflops
863.2 gflops
Gigaflops
576
-
Manufacturing process technology
55 nm
28 nm
Number of transistors
754 million
-
Pipelines / CUDA cores
128
384
Power consumption (TDP)
75 Watt
33 Watt
Texture fill rate
38 billion/sec
17.98
Memory type
GDDR3
DDR3
Maximum RAM amount
1 GB
4 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
Up to 1020 MHz
2000 MHz
Memory bandwidth
61 GB/s
16.02 GB/s
Shared memory
-
-
Display Connectors
Single Link DVIVGALVDSHDMIDual Link DVIDisplayPort
No outputs
HDMI
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
S/PDIF
-
DirectX
11.1 (10_0)
12 (11_0)
CUDA
+
+
OpenCL
1.1
1.2
OpenGL
2.1
4.5
Shader Model
4.0
5.1
Vulkan
N/A
1.1.126
GameWorks
-
+
GPU Boost
-
2.0
Optimus
-
+
Power management
8.0
-