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
P104-100
CORE STATE
GP104
VRAM
4 GB
CLOCK SPEED
1733 MHz
TDP
—
BUS WIDTH
256 bit
ARCHITECTURE
Pascal
PROCESS
16 nm
LAUNCH DATE
2017
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
3dmark_3dmark_steel_nomad_dx12
DETAILED SPECIFICATIONS
SPECIFICATION
840M
P104-100
Core Specs
Shading Units
384
1,920
+400.0%
Shaders
384
1,920
+400.0%
TMUs
16
120
+650.0%
ROPs
8
64
+700.0%
SM Count
—
15
Clocks
Base Clock
1029 MHz
1607 MHz
Boost Clock
1124 MHz
1733 MHz
Memory Clock
1001 MHz
2 Gbps effective
1251 MHz
10 Gbps effective
Memory
Memory Size
2 GB
4 GB
VRAM (MB)
2,048
4,096
+100.0%
Memory Type
DDR3
GDDR5X
Memory Bus
64 bit
256 bit
Bandwidth
16.02 GB/s
320.3 GB/s
Cache
L1 Cache
64 KB (per SMM)
48 KB (per SM)
L2 Cache
1024 KB
2 MB
Performance
Pixel Rate
8.992 GPixel/s
110.9 GPixel/s
Texture Rate
17.98 GTexel/s
208.0 GTexel/s
FP32 (TFLOPS)
863.2 GFLOPS
6.655 TFLOPS
FP64 (TFLOPS)
26.98 GFLOPS (1:32)
208.0 GFLOPS (1:32)
FP16 (TFLOPS)
—
104.0 GFLOPS (1:64)
Power
TDP
33 W
—
TDP (W)
33
—
Suggested PSU
—
200 W
Power Connectors
None
1x 8-pin
Architecture
Architecture
Maxwell
Pascal
GPU Name
GM108S
GP104
Generation
GeForce 800M
Mining GPUs
Process Size
28 nm
16 nm
Transistors
1,020 million
7,200 million
Die Size
77 mm²
314 mm²
Foundry
TSMC
TSMC
Density
13.2M / mm²
22.9M / mm²
API Support
DirectX
12 (11_0)
12 (12_1)
OpenGL
4.6
4.6
Vulkan
1.4
1.4
OpenCL
3.0
3.0
CUDA
5.0
6.1
Shader Model
6.7 (5.1)
6.8
Physical
Slot Width
IGP
Dual-slot
Length
—
267 mm
10.5 inches
Outputs
Portable Device Dependent
No outputs
Bus Interface
PCIe 3.0 x8
PCIe 1.0 x4
Other
Production
End-of-life
End-of-life
Predecessor
GeForce 700M
—
Successor
GeForce 900M
—