Home GPU Comparison NVIDIA GeForce GTX 680M vs NVIDIA GeForce 840A

NVIDIA GeForce GTX 680M vs NVIDIA GeForce 840A

NVIDIA GeForce GTX 680M
VS
NVIDIA GeForce 840A
NVIDIA GeForce GTX 680M
NVIDIA GeForce 840A
We compared two Mobile platform GPUs: 4GB VRAM GeForce GTX 680M and 2GB VRAM GeForce 840A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GTX 680M 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (115.2GB/s vs 16.02GB/s)
960 additional rendering cores
NVIDIA GeForce 840A 's Advantages
Released 1 years and 9 months late
Boost Clock has increased by 48% (1124MHz vs 758MHz)
Lower TDP (33W vs 100W)

Score

Benchmark

FP32 (float)
GeForce GTX 680M +136%
2.038 TFLOPS
GeForce 840A
0.863 TFLOPS
GeForce GTX 680M
VS
GeForce 840A

Graphics Card

Jun 2012
Release Date
Mar 2014
GeForce 600M
Generation
GeForce 800A
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 3.0 x8

Clock Speeds

719 MHz
Base Clock
1029 MHz
758 MHz
Boost Clock
1124 MHz
900 MHz
Memory Clock
1001 MHz

Memory

4GB
Memory Size
2GB
GDDR5
Memory Type
DDR3
256bit
Memory Bus
64bit
115.2GB/s
Bandwidth
16.02GB/s

Render Config

-
-
-
-
-
-
1344
Shading Units
384
112
TMUs
16
32
ROPs
8
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
64 KB (per SMM)
512 KB
L2 Cache
1024 KB
-
-
-

Theoretical Performance

21.22 GPixel/s
Pixel Rate
8.992 GPixel/s
84.90 GTexel/s
Texture Rate
17.98 GTexel/s
-
-
-
2.038 TFLOPS
FP32 (float)
863.2 GFLOPS
84.90 GFLOPS
FP64 (double)
26.98 GFLOPS

Board Design

100W
TDP
33W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
-

Graphics Processor

GK104
GPU Name
GM108
N13E-GTX-A2
GPU Variant
-
Kepler
Architecture
Maxwell
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
3.54 billion
Transistors
Unknown
294 mm²
Die Size
Unknown

Graphics Features

12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.3
3.0
CUDA
5.0
5.1
Shader Model
5.1

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