GeForce GT 640M vs GeForce 800M
Summary
Reasons to consider GeForce GT 640M |
| Higher theoretical gaming performance, based on specifications. |
| 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| Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications |
Reasons to consider GeForce 800M |
| This is a much newer product, it might have better long term support. |
| Supports PhysX |
| Based on an outdated architecture (Nvidia Fermi), there are no performance optimizations for current games and applications |
HWBench recommends GeForce GT 640M
Based on theoretical specifications.
Core Configuration
| GeForce GT 640M | | GeForce 800M | |
|---|
| GPU Name | GK107 (N13P-GS) | vs | GF117 (N14M-GL) |
| Fab Process | 28 nm | vs | 28 nm |
| Die Size | 118 mm² | vs | 116 mm² |
| Transistors | 1,270 million | vs | 585 million |
| Shaders | 384 | vs | 48 |
| Compute Units | 2 | vs | 1 |
| Core clock | 625 MHz | vs | 738 MHz |
| ROPs | 16 | vs | 8 |
| TMUs | 32 | vs | 8 |
Memory Configuration
| GeForce GT 640M | | GeForce 800M | |
|---|
| Memory Type | DDR3 | vs | DDR3 |
| Bus Width | 128 bit | vs | 64 bit |
| Memory Speed | 900 MHz
1800 MHz effective | vs | 900 MHz
1800 MHz effective |
| Memory Size | 2048 Mb | vs | 1024 Mb |
Additional details
| GeForce GT 640M | | GeForce 800M | |
|---|
| TDP | 32 watts | vs | 15 watts |
| Release Date | 22 Mar 2012 | vs | 17 Mar 2014 |
GeForce GT 640M
5.00 GP/s
GeForce 800M
1.47 GP/s
GigaPixels - higher is better
GeForce GT 640M
20.00 GT/s
GeForce 800M
5.90 GT/s
GigaTexels - higher is better
GeForce GT 640M
28.80 GB/s
GeForce 800M
14.40 GB/s
GB/s - higher is better
GeForce GT 640M
480.00 GFLOPs
GeForce 800M
141.70 GFLOPs
GFLOPs - higher is better