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
T400
CORE STATE
TU117
VRAM
2 GB
CLOCK SPEED
1425 MHz
TDP
30 W
BUS WIDTH
64 bit
ARCHITECTURE
Turing
PROCESS
12 nm
LAUNCH DATE
2021
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
840M
T400
Core Specs
Shading Units
384
384
0.0%
Shaders
384
384
0.0%
TMUs
16
24
+50.0%
ROPs
8
16
+100.0%
SM Count
—
6
Clocks
Base Clock
1029 MHz
420 MHz
Boost Clock
1124 MHz
1425 MHz
Memory Clock
1001 MHz
2 Gbps effective
1250 MHz
10 Gbps effective
Memory
Memory Size
2 GB
2 GB
VRAM (MB)
2,048
2,048
0.0%
Memory Type
DDR3
GDDR6
Memory Bus
64 bit
64 bit
Bandwidth
16.02 GB/s
80.00 GB/s
Cache
L1 Cache
64 KB (per SMM)
64 KB (per SM)
L2 Cache
1024 KB
1024 KB
Performance
Pixel Rate
8.992 GPixel/s
22.80 GPixel/s
Texture Rate
17.98 GTexel/s
34.20 GTexel/s
FP32 (TFLOPS)
863.2 GFLOPS
1,094.4 GFLOPS
FP64 (TFLOPS)
26.98 GFLOPS (1:32)
34.20 GFLOPS (1:32)
FP16 (TFLOPS)
—
2.189 TFLOPS (2:1)
Power
TDP
33 W
30 W
TDP (W)
33
30
-9.1%
Suggested PSU
—
200 W
Power Connectors
None
None
Architecture
Architecture
Maxwell
Turing
GPU Name
GM108S
TU117
Generation
GeForce 800M
Quadro Turing
(Tx000)
Process Size
28 nm
12 nm
Transistors
1,020 million
4,700 million
Die Size
77 mm²
200 mm²
Foundry
TSMC
TSMC
Density
13.2M / mm²
23.5M / 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
7.5
Shader Model
6.7 (5.1)
6.8
Physical
Slot Width
IGP
Single-slot
Outputs
Portable Device Dependent
3x mini-DisplayPort 1.4a
Bus Interface
PCIe 3.0 x8
PCIe 3.0 x16
Other
Production
End-of-life
End-of-life
Predecessor
GeForce 700M
Quadro Volta
Successor
GeForce 900M
Workstation Ampere