GeForce 840M vs GeForce GTX 660
Summary
GeForce 840M
100%
GeForce GTX 660
279%
Relative performance
Reasons to consider GeForce 840M |
| 107 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the GeForce GTX 660 . |
| This is a much newer product, it might have better long term support. |
| Supports PhysX |
| Supports G-Sync |
| Supports ShadowPlay (allows game streaming/recording with minimum performance penalty) |
| Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications |
Reasons to consider GeForce GTX 660 |
| Around 179% higher average synthetic performance. |
| Supports PhysX |
| Supports G-Sync |
| Supports ShadowPlay (allows game streaming/recording with minimum performance penalty) |
| Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications |
HWBench recommends GeForce GTX 660
The GeForce GTX 660 is the better performing card based on the synthetic benchmarks used (1 benchmarks).
Core Configuration
| GeForce 840M | | GeForce GTX 660 | |
|---|
| GPU Name | GM108 (N15S-GT) | vs | GK106 (GK106-400-A1) |
| Fab Process | 28 nm | vs | 28 nm |
| Die Size | 0 mm² | vs | 221 mm² |
| Transistors | unknown | vs | 2,540 million |
| Shaders | 384 | vs | 960 |
| Compute Units | 3 | vs | 5 |
| Core clock | 1029 MHz | vs | 980 MHz |
| ROPs | 8 | vs | 24 |
| TMUs | 16 | vs | 80 |
Memory Configuration
| GeForce 840M | | GeForce GTX 660 | |
|---|
| Memory Type | DDR3 | vs | GDDR5 |
| Bus Width | 64 bit | vs | 192 bit |
| Memory Speed | 1001 MHz
2002 MHz effective | vs | 1502 MHz
6008 MHz effective |
| Memory Size | 1024 Mb | vs | 2048 Mb |
Additional details
| GeForce 840M | | GeForce GTX 660 | |
|---|
| TDP | 33 watts | vs | 140 watts |
| Release Date | 12 Mar 2014 | vs | 6 Sep 2012 |
GeForce 840M
8.23 GP/s
GeForce GTX 660
19.60 GP/s
GigaPixels - higher is better
GeForce 840M
16.46 GT/s
GeForce GTX 660
78.40 GT/s
GigaTexels - higher is better
GeForce 840M
16.02 GB/s
GeForce GTX 660
144.00 GB/s
GB/s - higher is better
GeForce 840M
790.30 GFLOPs
GeForce GTX 660
1882.00 GFLOPs
GFLOPs - higher is better
GeForce 840M
2430
GeForce GTX 660
6800
Points (higher is better)