GPU Comparison
GEFORCE
NVIDIA GeForce 840M
CORE STATE
GM108S
VRAM
2 GB
CLOCK SPEED
1124 MHz
TDP
33 W
BUS WIDTH
64 bit
ARCHITECTURE
Maxwell
PROCESS
28 nm
LAUNCH DATE
2014
VS
GEFORCE
GeForce GT 755M
CORE STATE
GK107
VRAM
2 GB
CLOCK SPEED
1020 MHz
TDP
50 W
BUS WIDTH
128 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
geekbench_metal
DETAILED SPECIFICATIONS
SPECIFICATION
840M
GT 755M
Core Specs
Shading Units
384
384
0.0%
Shaders
384
384
0.0%
TMUs
16
32
+100.0%
ROPs
8
16
+100.0%
Clocks
Base Clock
1029 MHz
980 MHz
Boost Clock
1124 MHz
1020 MHz
Memory Clock
1001 MHz
2 Gbps effective
1350 MHz
5.4 Gbps effective
Memory
Memory Size
2 GB
2 GB
VRAM (MB)
2,048
2,048
0.0%
Memory Type
DDR3
GDDR5
Memory Bus
64 bit
128 bit
Bandwidth
16.02 GB/s
86.40 GB/s
Cache
L1 Cache
64 KB (per SMM)
16 KB (per SMX)
L2 Cache
1024 KB
256 KB
Performance
Pixel Rate
8.992 GPixel/s
8.160 GPixel/s
Texture Rate
17.98 GTexel/s
32.64 GTexel/s
FP32 (TFLOPS)
863.2 GFLOPS
783.4 GFLOPS
FP64 (TFLOPS)
26.98 GFLOPS (1:32)
32.64 GFLOPS (1:24)
Power
TDP
33 W
50 W
TDP (W)
33
50
+51.5%
Power Connectors
None
None
Architecture
Architecture
Maxwell
Kepler
GPU Name
GM108S
GK107
Generation
GeForce 800M
GeForce 700M
Process Size
28 nm
28 nm
Transistors
1,020 million
1,270 million
Die Size
77 mm²
118 mm²
Foundry
TSMC
TSMC
Density
13.2M / mm²
10.8M / mm²
API Support
DirectX
12 (11_0)
12 (11_0)
OpenGL
4.6
4.6
Vulkan
1.4
1.2.175
OpenCL
3.0
3.0
CUDA
5.0
3.0
Shader Model
6.7 (5.1)
6.5 (5.1)
Physical
Slot Width
IGP
MXM Module
Outputs
Portable Device Dependent
Portable Device Dependent
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
GeForce 700M
GeForce 600M
Successor
GeForce 900M
GeForce 800M