GeForce GTX 680MX Mac Edition vs GeForce 840A
We compared two Mobile platform GPUs: 2GB VRAM GeForce GTX 680MX Mac Edition and 2GB VRAM GeForce 840A to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce GTX 680MX Mac Edition 's Advantages
Larger VRAM bandwidth (160.0GB/s vs 16.02GB/s)
1152 additional rendering cores
GeForce 840A 's Advantages
Released 1 years and 5 months late
Boost Clock1124MHz
Lower TDP (33W vs 122W)
Score
Benchmark
FP32 (float)
GeForce GTX 680MX Mac Edition
+155%
2209
GeForce 840A
863
Graphics Card
Oct 2012
Release Date
Mar 2014
GeForce 600M
Generation
GeForce 800A
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x8
Clock Speeds
-
Base Clock
1029 MHz
-
Boost Clock
1124 MHz
1250 MHz
Memory Clock
1001 MHz
Memory
2GB
Memory Size
2GB
GDDR5
Memory Type
DDR3
256bit
Memory Bus
64bit
160.0GB/s
Bandwidth
16.02GB/s
Render Config
1536
Shading Units
384
128
TMUs
16
32
ROPs
8
16 KB (per SMX)
L1 Cache
64 KB (per SMM)
512 KB
L2 Cache
1024 KB
Theoretical Performance
23.01 GPixel/s
Pixel Rate
8.992 GPixel/s
92.03 GTexel/s
Texture Rate
17.98 GTexel/s
2.209 TFLOPS
FP32 (float)
863.2 GFLOPS
92.03 GFLOPS
FP64 (double)
26.98 GFLOPS
Board Design
122W
TDP
33W
No outputs
Outputs
No outputs
Graphics Processor
GK104
GPU Name
GM108
N13E-GTX2-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
